Parallel type

An accurate, simple and compact analog-to-digital converter has been found. The converter comprises A voltage divider circuit including a plurality of stepped voltage dividing points separated by a plurality of resistors for dividing the input voltage received from the analog input terminal; A group...     

An EMP resistant A/D converter having no triggered circuits, the digital code word being formed by sampling the analog function on a periodic basis, selectively quantizing the levels sampled into channels providing the digits of the output code through a discrete fiber optic delay medium for each digit...     

This encoder comprises a series of resistors for determining the reference voltages, and comparators having at least one pair of outputs A and B. First inputs of said comparators are connected respectively to said resistors and second inputs of said comparators are connected to the voltage to be encoded...     

A procedure for the parallel conversion of an analog signal to a cyclic binary code with one comparison to a threshold per channel, or bit, in which each channel is composed of an analog function generator, characterized by the fact that the transfer function of said generator is constructed in a piecewise-linear...     

An analog to digital converter used for converting such an analog signal having dc parts of a constant level periodically as a television picture signal, comprising a plurality of comparators comparing the analog signal with several reference voltage levels, and at least one dc clamper clamping the reference...     

In an analog to digital converter in which each sampled portion of an incoming video or other analog signal is converted to a digital character in a plurality of parallel conversions occurring serially; the range of the voltage level reference signals of descending magnitude which are applied to comparators...     

An analog-to-digital converter of the type using a plurality of voltage comparators, each, in response to an applied reference voltage and an analog voltage to be digitized, producing one of two logic signals depending on which of the applied voltages is the greater includes apparatus for altering the...     

Noise induced hunting is eliminated in successive ranged digital/analog converter bias correction circuits by means of a digital hysteresis circuit. The digital hysteresis circuit comprehends a first up/down counter that counts to its extremums from a pre-set intermediate state in response to enable...     

An automatic fastener selection apparatus for sensing the composite thickness of a plurality of workpieces, determining which one of a plurality fastener sizes is appropriate for joining the workpieces together, and generating a dispensing signal representing the appropriate fastener size. Sensing apparatus...     

In an analog to digital converting device having plural converting stages provided for converting an analog signal to a multi-bit digital signal, the lowest or just preceding converting stages, wherein analog signals to be converted are quantized by minute steps and can be regarded as similar to Gaussian...     

An indicator arrangement includes comparators for parallel comparison of an analog input voltage with digitalizing standard voltages to digitalize the input voltage and an indicator for indicating digitalized output. The arrangement is provided with a controller periodically switched between a first...     

An analog signal is converted into an n bit digital signal by n comparator circuits which compare the analog input to 2.sup.n -1 reference inputs. Each comparator output alternates as the analog signal increases through the reference levels. Logic circuitry including n-1 exclusive-OR gates decodes the...     

An analog-digital converter supplying a digital output signal in natural or reflected binary code, having an input stage, n consecutive conversion stages comprising two parallel channels of identical structure, in each of which there are two current paths in accordance with the result of a comparison...     

An analog to digital converter device is disclosed. The device includes a plurality of serially connected stages representing bits, each stage including generally a source of current or fluid and a second current or fluid source of opposite polarity, a current or flow direction controlled voltage or...     

Combining integrated injection logic (I.sup.2 L) and linear circuitry permits fabrication of a highly dense analog-to-digital (A-to-D) converter. The heart of the A-to-D converter is a linear-I.sup.2 L plurality of high density variable current sources which are proportional to each other. These variable...     

Digital information transmission system components including at least one unit arranged to transmit signal elements in parallel, at least one unit arranged to receive signal elements in parallel, and a corresponding plurality of signal transmission paths connected between such units to each convey a...     

In a parallel analog-to-digital converter wherein the comparator inputs are switched between +1/2 the voltage corresponding to the least significant bit and -1/2 said voltage. There is provided a bipolar differential amplifier-like circuit with a resistor connecting the collectors of the two transistors...     

For the dynamic compensation of the offset voltage in such converters each non-inverting comparator input (+) is connected via a first transfer transistor (T11, T12, T1p) to the signal input (SE) and via a second transfer transistor (T21, T22, T2p) to the associated voltage divider tap of the voltage...     

Apparatus for decreasing effect of transition of more significant bits in D/A converter reference of A/D converter. A pair of D/A converters are connected in tandem to eliminate transition of more significant bits of half scale. Also, three D/A converters are connected in parallel with each being offset...     

A circuit of a monolithically integrable MOS-comparator has a capacitor, a signal input and a reference input of the comparator being alternatingly connected to the capacitor via respective first and second clock-controlled transfer transistors, a first amplifier stage having a control input and an output,...     

An analog-to-digital converter for converting an analog input voltage signal to a digital output voltage signal of m upper bits and n lower bits includes at least (2.sup.m+n -1) resistors connected in a series circuit to a voltage source for establishing respective reference voltages; at least (2.sup.m...     

For the dynamic compensation of the offset voltage in such converters each non-inverting comparator input (+) is connected via a first transfer transistor (T11, T12, T1p) to the signal input (SE) and via a second transfer transistor (T21, T22, T2p) to the associated voltage divider tap of the voltage...     

A latched comparator circuit is disclosed in which a voltage comparator circuit of a differential construction composing a part of the latched comparator circuit is substituted for by a plurality of differential amplifying circuits connected in parallel to the prior stage thereof and which are supplied...     

An analog-to-digital converter for converting an analog input signal to a digital output signal with m upper bits and n lower bits includes 2.sup.m+n -1 resistors establishing 2.sup.m+n reference voltages for comparison with an amplitude of the analog input signal, 2.sup.m -1 voltage comparing circuits...     

An analog-to-digital converter circuit is disclosed employing a plurality of comparators each having the same reference voltage input. At each comparator stage plus and minus binary "bit weights" are developed. Selection of either the positive or negative bit weights at a stage allows a binary fraction...     

A parallel analog-to-digital converter employing a novel binary encoding technique to reduce the errors arising from multiple one-to-zero transitions in comparator outputs. An analog signal to be converted is applied in conventional fashion to any array of comparators, from which are obtained an array...     

An analog-to-digital converter in the form of an integrated circuit providing a plurality of parallel-connected sub-converters, each producing one bit of the output word. For any sub-converter, an elongate P-type diffusion (20) serves as the base of a multiple-emitter NPN transistor. The same diffusion...     

A parallel analog-to-digital converter circuit comprises a plurality of level comparator circuits and a plurality of detectors. The level comparator circuits compare the level of one analog input signal with a plurality of reference levels. Any two or more level comparator circuits which receive consecutive...     

An analog to digital flash converter provides a multiple bit, parallel output arranged in more significant to less significant bits. The converter includes a voltage to current converter for providing an analog signal as an input current to a plurality of parallel converter stages. A reference signal...     

An integrated semiconductor circuit for an analog-to-digital converter according to the parallel method, includes a multiplicity of identical comparators and a multiplicity of NOR gates. The comparators are addressable in a staggered manner at reference inputs thereof by a respective reference voltage...     

An analog-to-digital converter includes a voltage divider (ST) having n series-connected resistors (R.sub.v ; v=1, 2, . . . n), divider points between the resistors (R.sub.v) and an end receiving a d-c reference voltage (U.sub.R) versus a base point potential, n identical comparators (K.sub.v) each having...     

An arrangement for reducing error in an interleaved analog-to-digital signal conversion system. The arrangement provides matching and adjustment certainty as the basis for such error reduction.

An analog-to-digital converter including a reference voltage generator for generating coarse and fine reference voltages, a first group of comparators for comparing an analog input voltage with the coarse reference voltages, a second group of comparators and an encoder for encoding outputs of the comparators....     

An improved analog to digital converter is provided in which high and low order bytes of the digital output can be sequentially generated by a single flash converter circuit. Upon the generation of the high order byte, a high byte equivalent voltage is subtracted from the analog input voltage and the...     

A parallel comparison type A/D converter comprises a voltage divider having 2.sup.N divider junctions connected in series between a reference voltage terminal and a ground potential terminal, 2.sup.N comparators for receiving as reference voltages the outputs of the respective divider junctions, a position...     

A multi-step A/D converter of the successive approximation type utilizes a single three-position switchable current-output DAC in combination with a voltage divider, a plurality of comparators, a decoder, a successive approximation register and a control logic module to provide a high speed, high resolution...     

A continuous time domain parallel analog to digital converter is provided for accomplishing the general successive rectification algorithm I.sub.out =2.vertline.I.sub.in .vertline.-I.sub.ref. One stage of the continuous parallel converter comprises a complimentary transistor pair and three current mirrors....     

In an analog-to-digital converter circuit comprising a comparison circuit per tap of a potential divider. The comparison circuits are arranged in groups each controlling a respective differential amplifier. In a group only one output of each comparison circuit is connected to an output of the subsequent...     

An analog-to-digital converter includes: a N-tap ACT delay line for containing an injected analog signal, the N taps being spaced from one another along the delay line; means for generating a surface acoustic wave (SAW) into the delay line, wherein the SAW collects the injected signal into charge packets...     

In a serial-parallel A/D converter, at least two sets of comparators are provided for the conversion of the low-order bits and are operated in a cyclic fashion. Since the subsequent input can be subjected to the A/D conversion without waiting for the determination of the low-order bits, the conversion...     

In an analog-to-digital converter of a parallel comparison type having a plurality of comparators for comparing an analog input voltage with different reference voltages and converting a comparison result into a digital output by means of an encoder, a plurality of comparators each having a different...     

This flash analog-to-digital converter (ADC) offers the fastest possible high resolution conversion as the quantization level of the input signal is determined in a straightforward structure, whereby no feedback exists. For instance, a 16-bit flash ADC employs approximately 555 rather than 65,535 comparators...     

A comparator bank of an A/D converter comprising a plurality of comparators arranged into rows in a folded-back shape and a supply voltage line and a ground line in parallel with each other and connected to the comparators to provide reference potentials thereto according to a distribution shape which...     

The invention centers around a system for interpolating between multiple pairs of main complementary signals to generate further pairs of complementary signals. An input circuit (10) supplies the main signals. The interpolation is done with two strings (12) of a selected number of impedance elements...     

A voltage-to-frequency converter comprising a triwave generator responsive to an input signal to produce an output triangular signal the frequency of which corresponds to the magnitude of the input signal, and a voltage-slope-to-periodic-function (VSTPF) generator which receives the output of the triwave...     

A parallel (flashed) type analog-to-digital converter is provided which is fabricated on a single integrated-circuit chip. An input analog voltage is compared with respective reference voltages by a number of comparators. A change position of an output pattern (for example, a thermometer format signal)...     

First and second reference voltages of different value are introduced to opposite ends of a first line disposed on an IC chip and made from a suitable material (e.g. ion-implanted polysilicon). An input voltage having a value between such reference voltages is provided on a second line on the chip. The...     

A semiconductor integrated circuit includes a plurality of comparators for comparing an analog input with reference voltage or voltages, holding means for holding a digital value, and control means for controlling the outputs of the plurality of comparators by a control signal responsive to the digital...     

A flash type AD converter includes a group of comparators divided into blocks each including 2.sup.N comparators (N=1, 2, ---), each comparing an input signal with one of a plurality of reference signals, each having individually different voltage levels. One of the comparators may correspond to a level...     

A subranging analogue to digital converter comprising a first analogue to digital converter for receiving an analogue input signal to be converted, a digital to analogue converter the input of which is coupled in series to the output of the first analogue to digital converter and a second analogue to...     

Wideband amplifier having a differential amplifier or single-ended amplifier and having a capacitaqnce compensation circuit is disclosed. The amplifier detects the voltage variations of a signal input node or a signal output node, generates a compensation current equal in magnitude and opposite in direction...     

Input and reference voltages are respectively applied to the control elements of first and second transistors. This causes a substantially constant current to be divided between the first and second transistors in first time periods. In second time periods alternating with the first periods, the reference...     

A serial-parallel type AD converter comprises a first parallel type AD converting portion determining a higher order bit of a digital signal, a second parallel type AD converting portion determining a lower order bit of the digital signal and error correcting circuit. In the first parallel type Ad converting...     

An analog/digital converter circuit including a capacitor having a first end, to which an analog voltage is applied, and a second end, an input buffer circuit having an input terminal, connected to the second end of said capacitor, and an output terminal, a reference voltage generating circuit for generating...     

A semiconductor integrated circuit which is comprised of the following; a plurality of comparators which respectively compare analog values inputted for multiplication with individual reference voltages respectively, multiplication means which controls values outputted from those plural comparators by...     

An analog/digital converter operating on the principle of charge distribution includes a capacitor network having dual-weighted capacitors including two smallest capacitors. The capacitors each have two terminals. A comparator has a first input connected to one of the terminals of each of the capacitors...     

The apparatus comprises a parallel analog-to-digital converter comprising a matrix of differentially coupled transistor pairs wherein the base of one transistor of each differential pair is coupled to a reference voltage and the base of the other transistor of each differential pair is coupled to the...     

A substantially constant current is divided between two lines in accordance with the relative values of an input voltage and a reference voltage respectively introduced to such lines. The currents through the first and second lines respectively charge first and second capacitances. The charges in the...     

In a cyclic averaging analog to digital converter, reference voltages having a plurality of levels, each of which is inputted to one of a plurality of comparators in a flash type analog to digital converter, are shifted cyclically by a small voltage, and the outputs of the flash type analog to digital...     

In an analog-digital converter working at microwave frequencies, the input signal is addressed in parallel to bit levels which are in cascade with one another. Each bit level has a transducer which converts the voltage into a current, and compares this current with a calibrated source. The resultant...     

An analog-to-digital converter having: (1) a quantization stage which received an analog input signal and has separate output terminals for different threshold levels; (2) a discriminator stage for exclusively using the highest threshold output terminal of the quantization stage to produce on a a corresponding...     

A parallel type A/D converter includes circuitry for generating plural reference voltages, comparators for comparing the plural reference voltages with an input voltage, logic circuits for logically processing the outputs of comparators, and an encoder circuit for encoding the outputs from the logic...     

Disclosed is a parallel analog-to-digital converter in which a plurality of comparators are divided into a plurality of groups each consisting of a predetermined number of comparators, and outputs of at least these comparators belonging to the same group are added in an analog or digital fashion. Whether...     

Method and apparatus for sampling an analog voltage and providing a digital representation of the sampled voltage by binary switching individual resistive networks in parallel with a reference leg of a comparator circuit and combining binary switching signals with the comparator output signal.

A first film disposed in a first direction on an integrated circuit chip and having uniformly spaced taps provides progressively increasing resistance values. A second film disposed on the chip in a direction opposite to the first direction at a position displaced in any direction from the first film...     

To provide for a higher speed operation, lower cost and less complexity in terms of manufacturing, the present invention analog-to-digital converter has feedforwards, from the more significant comparators, to the less significant comparators. As the respective outputs of the comparators change state,...     

A parallel analog-to-digital converter having reference-voltage generating means dividing the fundamental reference voltage into exponential reference voltages according to an exponential scale, and further dividing each voltage between two consecutive exponential reference voltages into a plurality...     

This invention relates to a flash-successive approximation analog-to-digital converter combining the low speed, high resolution successive approximation method of conversion with the high speed, low resolution flash method of conversion, which provides the advantages of higher conversion speed with no...     

A resolution enhancement circuit comprises a voltage divider used to add multiples of two position representing quadrature signals into a plurality of adder output signals having zero crossings during the cycle of the quadrature signals, a digitizer creating a plurality digital signals based on the individual...     

This multi-flash analog-to-digital converter (ADC), in particular dual flash ADC, has extremely high speed and resolution. The final resolution of a comparator/multiplexer section can be effectively doubled. For instance, a 16-bit ADC can employ 300 rather than 255 comparators. A monolithic integration...     

High speed conversion of an analog input signal to a digital output signal is performed by applying the analog input to an input of a unity gain amplifier. During a first pass, an output signal produced by the amplifier is applied to inputs of each of a plurality of comparators. A first group of successively...     

A successive approximation analog-to-digital converter whose susceptibility to errors is reduced by the use of overlapping measurement ranges in the successive conversion steps.

First terminals are equally spaced on a substantially uniformly resistive thin film at or near a first side edge of the film at progressive positions downwardly from the top of the film. Near the bottom of the film, second terminals are preferably equally spaced progressively inwardly from the first...     

An asynchronous, rapid, neural network analog-to-digital converter. This converter requires only two different resistance values in R2R resistor ladders, and does not require both positive and negative biases. An average of n/2 steps is required for an n-bit conversion.

An analog/digital converter supplying logic words constituted by P high order bits and Q low order bits, comprises: a divider (2), 2.sup.P high weight comparators (5), 2.sup.Q low weight comparators (11), and a selector (14). The high weight comparators have their second inputs (E21) enabled by the clock...     

This multi-flash analog-to-digital converter (ADC), in particular dual flash ADC, has extremely high speed and resolution. The final resolution of a comparator/multiplexer section can be effectively doubled. For instance, a 16-bit ADC can employ 300 rather than 255 comparators. A monolithic integration...     

An architecture for a digital-to-analog converter or an analog-to-digital converter comprises a segmented voltage divider comprising a first resistive voltage divider providing a multiplicity of equal selectable voltage segments any one of which may be coupled directly across a second resistive voltage...     

An analog-to-digital converter comprises plural amplifiers, a first group of transistors for input, a second group of transistor for biasing, a third group of transistors for feedback and plural inverters. The first group of transistors are PMOS transistors, and the second and third groups of transistors...     

A full flash analog-to-digital converter has a plurality of comparators for comparing an analog input voltage with respective reference voltages, a first-stage encoder for generating low-order bits based on output signals from the comparators, and a second-stage encoder for generating high-order bits...     

A logic analyzer is provided with probes (20) deriving the signals to be tested which are introduced into a digitizer (22) provided with comparators which carry out a digitization according to a logic system having two states. It comprises a change-over circuit (21) arranged between the probe and the...     

An N-bit interpolation analog/digital circuit comprises a first stage of p comparators (C.sub.1. . . C.sub.p). The outputs of the comparators are combined in a plurality of groups, which are connected so that the combined output (S.sub.1a, S.sub.1b) of each group has the shape of a signal periodically...     

An analog-to-digital converter (ADC) having two cascaded A/D stages of the parallel type wherein the analog signal is compared with a set of threshold reference voltages. The first stage develops a set of most-significant bits and produces two analog residue signals: a normal residue corresponding to...     

Analog-to-digital converter operating in parallel having an analog signal input and a number of digital signal outputs, comprising a plurality of comparators having each two inputs and one output, one input being connected to an impedance network for supplying this one input with its own predetermined...     

An analog-digital converter includes a differential amplifier having collector resistances each being in the form of a resistance line. Node points between resistance segments of the resistance lines are in the form of output terminals. Comparators with a balanced input are provided in the same amount...     

An analog-to-digital converter (ADC) having two cascaded A/D stages of the parallel type wherein the analog signal is compared with a set of threshold reference voltages. The first stage develops a set of most-significant bits and produces two analog residue signals: a normal residue corresponding to...     

An A/D converter includes a resistor network generating a reference voltage, a level detector for detecting the level of an input analogue signal with a reference voltage from the resistor network as a reference, and an encoder for providing a digital signal by encoding the output of the level detector....     

A priority encoder using a MOS array and neural network concepts is composed of an input side neuron group, an output side neuron group, a synapse group, a bias group and inverters. The encoder is simple in its construction and fast in its operating speed compared with the conventional priority encoders...     

A coding circuit forming a 1-from-N code from an X-from-N code includes partial circuits in which each position of the X-from-N code forms an input value of a partial circuit. Each partial circuit is formed of three emitter-coupled transistor pairs, a current source connected to reference potential,...     

A flash-type analog-to-digital converter (ADC) uses only 2.sup.n-m comparators coupled to the analog input line to generate a n-bit digital output signal. Each pair of these actual comparators are coupled, in parallel, to 2.sup.m pseudocomparators which provide values representing comparisons of the...     

By making a folded waveform of a folding circuit sharp, the number of elements used in an ADC is reduced and less power consumption is achieved. A folding circuit is composed of a plurality of master-comparator latches, a pair of wiring means for master-to-slave connection, and a slave latch. By means...     

An N-bit asynchronous successive approximation analog-to-digital converter is provided for converting an analog signal to a binary coded representation thereof. The analog-to-digital converter employs N inverting amplifiers. Each of the inverting amplifiers receives a scaled analog input signal and provides...     

A analog-to-digital converter includes: an analog signal input, a reference voltage source, a portion for the combined processing of the analog signal and reference voltage, and a coding portion for supplying a digital output signal which is a function of the results of this processing. The processing...     

An A-D converter of an image signal comprises a weighing circuit for performing a different weighing for each quantization step of A/D conversion. The different weighing is performed in accordance with gamma or white compression characteristics of the image signal.

A folding circuit includes a differential resistance ladder and a plurality of comparators coupled to the differential resistance ladder in a manner which substantially reduces capacitive loading on the differential ladder. In addition, the folding circuit has a minimum number of output resistors to...     

In an analog signal comparator circuit, first and second inversion output currents to the first and second reference values of input analog signals, a plurality of the first and second dividually inversion outputs divided the first and second non-inversion output currents, and the first and second dividually...     

Link capacitors are used to establish connection between joining-points of coupling capacitors and inverters in an inverter chopper comparator array, in order to reduce injected electric charge variation due to feedthrough. Some of the comparators in the comparator array, arranged at each end thereof,...     

An analog-to-digital converter (ADC) having two cascaded A/D stages of the parallel type wherein the analog signal is compared with a set of threshold reference voltages. The first stage develops a set of most-significant bits and produces two analog residue signals: a normal residue corresponding to...     

The invention concerns precision analogue-digital converters. For the fine conversion, supplying the low order bits (B0 to Bk) for an analogue voltage Vin to be converted, three ordinary differential amplifiers (ADA, ADB, ADC) are used connected to three voltage references VR(i-1), VR(i), VR(i+1). These...     

There are provided n signal processing units for sampling an analog signal based on n [references] reference voltages, k intermediate signal processing units for comparing two intermediate signals outputted from two adjacent signal processing units in n signal processing units, and an encoder for coding...     

An analog/digital converter providing a high conversion speed and resolution while greatly reducing the number of circuit elements. The A/D converter in a first embodiment is a 6-bit resolution flash A/D converter made up of a 3-bit lower A/D conversion section and a 3-bit upper A/D conversion section....