Matches 301 - 350 out of 371 < 1 2 3 4 5 6 7 8 >
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4633222 Clock shaping circuit and method  
Clock shaping means responsive to the frequency of an incoming clock signal (CL I ) produce asymmetrical clocking signals whose high to low ratio varies as a function of the frequency of CL I . The...
4633220 Decoder using pass-transistor networks  
A matrix comprised of pass transistor cells (81 through 96) forms an address decoder circuit (80). By using pass transistor cells in a matrix format, a decoder which consumes a minimum of power and...
4622536 Ratio independent cyclic A/D and D/A conversion using a reciprocating reference approach  
An algorithmic analog-to-digital and digital-to-analog converter 10 combines the techniques of switched capacitor cyclic conversion by using first and second amplifiers 31, 32 with capacitors C 1 ,...
4618848 Analog to digital converter circuit  
A circuit for converting analog to digital data uses a CMOS multiplexer, an analog to digital converter and an operational amplifier buffer controlled by a single chip microprocessor. An FET shunt...
4596979 Fast response digital-to-analog converter  
A digital-to-analog converter for high speed applications including slew rate limited waveform generation such as raster scanning is described. The converter includes a binary current ladder for...
4594577 Current mirror digital to analog converter  
An integrated circuit digital to analog converter comprised of MOS current mirrors and utilizing additional MOS devices to provide transmission gates and control means. Each transmission gate 36 is...
4587477 Binary scaled current array source for digital to analog converters  
A binary scaled current source in which a set of binary switches M 1 , . . . , M n controllably switch a current I to a selected one of a set of n outputs. Each switch M k is controlled by an...
4558242 Extended reference range, voltage-mode CMOS D/A converter  
A CMOS D/A converter for use in a voltage-mode and having complementary-driven switch pairs for V ref and A gnd respectively. The "ON" gate voltage of the A gnd switch is adjusted in accordance...
4553132 Apparatus for matching FET switches as for a video digital-to-analog converter  
A digital-to-analog converter includes a plurality of pairs of complementary conductivity field-effect transistors (FETs) coupled for applying reference potentials to a resistive ladder network in...
4551705 Programmable integrated circuit AC resistor network  
A monolithic integrated circuit D-to-A converter and programmable AC resistor network and current source is disclosed in which an array of FET cells formed on a semiconductor body is divided into a...
4551709 Integrable digital/analog converter  
Integrable digital/analog converter, comprising a reference d-c voltage or current source having two terminals, a conductor network having an input connected to the first terminal of the reference...
4547763 MOS Parallel A/D converter  
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)...
4531113 Capacitor array  
A capacitor array for a companded pulse code modulation voice codec includes a first plurality of capacitors having a common capacitance C each. A plurality of switching means individually and...
4523179 Integratable D/A converter  
A D/A converter having a feedback capacitor C1 between the inverting input and output of an operational amplifier A1 having a virtual ground on the inverting input. First switch means is...
4517551 Digital to analog converter circuit  
A digital to analog converter which provides positive and negative analog output signals in response to a digital input number is disclosed. The input number has n bits including a sign bit and n-1...
4489309 Pipelined charge coupled to analog to digital converter  
A pipelined charge coupled analog to digital converter which provides a plurality of serially arranged pipelined stages that are connected to pass signal and reference charge packets from stage to...
4449118 Switching circuitry as for a flash A/D converter  
A flash type A/D converter has a plurality of transistor switch means for alternately connecting respective ones of a plurality of reference potentials or input signal to a plurality of summing...
4420743 Voltage comparator using unequal gate width FET's  
The threshold comparator includes a switching FET including a gate electrode and a load FET connected in series across a source of potential where the load FET is configured to provide a saturation...
4393370 Digital to analog converter using matrix of current sources  
A semiconductor circuit having an improved current switching function is disclosed. The circuit comprises at least one current switch unit including a current source, a current output node, a field...
4383188 Voltage-controlled constant current source  
An integrating analog-to-digital converter for converting an input signal having an amplitude representing an analog quantity into a digital signal representing the quantity wherein the input...
4366470 Converter  
A converter includes a voltage selector which employs IGFETs as voltage switching elements, and a controller which controls the IGFETs. Each of the IGFETs in the voltage selector is made either the...
4354175 Analog/digital converter utilizing a single column of analog switches  
An analog switch for an analog-to-digital converter which permits an analog voltage level to be read from a series resistor ladder network and be compared to an external analog signal by a...
4353057 System for digitizing transient signals  
A system for digitizing transient signals comprises a plurality of high-speed sampling gates connected in parallel to a common input terminal, these gates working in interleaved relationship into...
4348658 Analog-to-digital converter using half range technique  
In a successive-approximation charge-redistribution analog-to-digital converter which includes a binary weighted capacitive ladder network, an unknown analog input voltage is sampled only on the...
4331892 Monolithic integrated circuit for a digital-to-analog converter  
A monolithic integrated digital-to-analog converter is provided wherein the resistors are replaced by insulated-gate field-effect transistors thus avoiding any detrimental effects of variation...
4323887 CMOS Analog to digital converter with selectable voltage follower buffering  
An analog to digital converter is fabricated using CMOS construction and uses a successive approximation register to develop the bits in a digital word. A digital to analog converter converts the...
4311988 Programmable A-law and μ-law DAC  
A companded stacked DAC is provided which can be used in an A-law or μ-law conversion merely by selection. The companded DAC is inherently monotonic and can be integrated with field effect...
4293848 MOS Analog-to-digital converter  
An MOS, integrated circuit, analog-to-digital converter powered by a single power supply potential and suitable for converting an analog signal equal to that power supply potential is described....
4281319 Digital-to-analog converter  
A bipolar converter for analog and digital conversion is based on a single-ended MOS chip having a grounded substrate. The MOS chip includes a 2 N R ladder and an on-chip output polarity switch...
4256983 Voltage-to-frequency converter having a constant frequency mode of operation  
A combination of integrating and logic means in an electrical circuit responds to inputs from a variable analog control signal and from a constant frequency train of digital pulses. The magnitude...
4250493 Analog-to-digital converter employing constant-current circuit incorporating MISFET  
The constant-current circuit consists of two MISFETs connected in series and a gate bias circuit for these MISFETs. The drain voltage of the first MISFET is maintained substantially constant by the...
4250494 Charge transfer analog-to-digital converter with precise charge control  
A charge transfer analog-to-digital converter is provided with means to establish the potential across a large storage well at a comparator threshold voltage at the initiation of a cycle. Charge...
4209781 MOS Digital-to-analog converter employing scaled field effect devices  
A digital-to-analog driver capable of driving a speaker or other voice coil means and implementable using field effect semiconductor devices is disclosed. A plurality of switching field effect...
4198608 Glitch detector and trap  
A glitch detector and trap circuit is disclosed for removing a glitch generated by a digital-to-analog (D/A) converter due to an error in one or more bits of the input digital signal. The analog...
4180807 Charge transfer circuit with voltage threshold compensating means  
A charge transfer circuit of the type including first and second capacitors separated by a charge transfer MOSFET is disclosed. The disclosure includes the description of a circuit which...
4178585 Analog-to-digital converter  
An analog-to-digital converter comprising a capacitor for storing an analog input signal, a constant current discharging circuit coupled with the capacitor for discharging the charge stored...
4156233 Charge transfer circuit with leakage current compensating means  
A monolithic analog to digital converter having leakage current compensating circuitry is disclosed. First and second charge storage capacitors are formed in a single semi-conductor substrate. An...
4145689 A/D Converter  
An analog-to-digital converter is described wherein an analog signal is converted to a digital equivalent thereof in a structure suitable for implementation in MOS form. The analog signal is...
4144527 Dual-slope analog to digital converter  
A time-independent, dual-slope analog to digital converter is disclosed. During a first integration period, a predetermined number of charge packets having a first polarity and a magnitude...
4144526 Circuit arrangement and operating process for converting an analogue signal into a digital signal  
A circuit arrangement and process is provided for converting an analogue signal into a digital signal or converting a digital signal into an analogue signal. The circuit arrangement has first and...
4138665 Preamplifier for analog to digital converters  
A preamplifier using charge transfer techniques is formed on the same chip as a charge transfer analog to digital converter. The preamplifier then couples low level output sensors directly to the...
4132908 Digital-to-analog conversion with deglitch  
A deglitch circuit is provided to connect a source of changing voltage or current to a utilization device to eliminate unwanted voltage excursion contemporaneous with changes in amplitude. The...
4121205 Digital to analog converter with power amplification  
A power amplifier has an input terminal supplied with a PCM (pulse code modulated) signal and a plurality of power supplies, each producing a voltage weighted according to the order of bits of the...
4091378 Arrangement, in particular an analog-digital/digital-analog converter and method of operation thereof  
An arrangement, particularly an analog-digital/digital-analog converter having a resistance line or chain, and a plurality of voltage comparators, each preferably comprising an insulator-layer,...
4083045 MOS analog to digital converter  
An MOS analog to digital converter circuit is provided in which an MOS enhanced capacitor is interposed between a buffer circuit responsive to an analog input and a digital output. The capacitance...
4074259 Process for analog/digital conversion  
A programmable analog-to-digital conversion system having a response characteristic which may be shaped as desired by selectively supplying digital control signals to a field effect transistor...
4070667 Charge transfer analog-to-digital converter  
A charge transfer analog-to-digital converter is described wherein an analog signal is converted to a digital equivalent thereof in a structure suitable to be implemented in MOS form. A dual slope...
4064506 Current mirror amplifiers with programmable current gains  
A current mirror amplifier in which at least one of the mirroring transistors is a composite transistor in which the number of simple transistors parallelled to form the composite transistor can be...
4058808 High performance analog to digital converter for integrated circuits  
An analog to digital converter suitable for fabrication according to integrated circuitry technology. The voltage to be converted is applied to a storage capacitor which is pulse discharged in...
4045793 Digital to analog converter  
An MOS digital to analog converter on a semiconductor chip includes N digital inputs and a single analog output. The digital inputs control circuitry which switches in various combinations of 2 0 ...
Matches 301 - 350 out of 371 < 1 2 3 4 5 6 7 8 >