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7443176 Test mode and test method for a temperature tamper detection circuit  
An integrated circuit temperature sensor includes a sensor to determine whether the integrated circuit is currently exposed to a relatively low or high temperature. A measured voltage across the...
7362248 Temperature tamper detection circuit and method  
A sensing circuit determines whether an integrated circuit is currently exposed to one of a relatively low or a relatively high temperature. A selection circuit selects a measured voltage across...
7317409 Apparatus and method for interfacing time-variant signals  
An improved apparatus and method for interfacing a time variant waveform between two hardware environments. In one aspect, the invention comprises a circuit for accurately simulating the output of...
7236111 Linearizing methods and structures for amplifiers  
Methods and structures are provided to enhance the linearity of amplifiers such as those which include a complementary common-collector amplifier stage. The methods and structures configure this...
7116253 Radio frequency digital-to-analog converter  
A radio frequency digital-to-analog converter with a programmable current output. In exemplary aspects of the invention, improved apparatus and methods for providing (i) current mirror matching,...
7030790 Systems and methods for auto gain control in Bi-CMOS digital to analog converters  
The accuracy of output power in a digital-to-analog converter (DAC) is critical in certain applications. When bi-CMOS technology is used to implement a DAC, a number of factors affect the gain...
6888485 Digital-analog converter  
A digital-analog converter for mobile radiotelephone base stations includes a D flip-flop and a modulator. The D flip-flop is clocked by a clock signal and a digital input signal is fed to an input...
6744391 System for sampling a signal in an electronic instrument using a unipolar A/D converter  
The system includes a unipolar A/D converter, which samples analog signal inputs thereto, the A/D converter being used in a protective relay for electric power systems. The unipolar A/D converter...
6674380 Digital-phase to digital amplitude translator with first bit off priority coded output for input to unit weighed digital to analog converter  
Differential heating is avoided by a digital to analog converter for generating analog cyclical waveforms having a period. The cyclical waveforms are generated by conversion of a sequence of step...
6492929 Analogue to digital converter and method of analogue to digital conversion with non-uniform sampling  
An analogue to digital converter generating at least two threshold levels and a comparator for comparing each of the levels with the input signal and generating a primary digital output signal to...
6369743 Differential amplifier, comparator, and A/D converter  
An OTA circuit is disposed between a differential pair composed of NMOS transistors and an NMOS follower transistor that composes an output buffer circuit. The OTA circuit generates a compensation...
6346902 Analog to digital converter  
An analog to digital converter has a differential input arrangement with a static reference ladder and comparators for comparing the differential input signal with respective reference voltages...
6246353 Integrated-circuit structures and methods for correction of temperature and process-induced parameter errors  
Integrated-circuit structures and methods are provided for generating an error signal that represents temperature and process-induced signal changes in transistor parameters. In particular, a...
5990817 A/D conversion device having a programmable transfer characteristic  
The invention relates to an A/D conversion device intended to supply at the output a digital signal Vout[0:7] resulting from the conversion of an analog input voltage Vin and receiving a control...
5805095 Two's complement digital to analog converter  
A two's complement digital to analog converter (300) is for converting a two's complement binary value to an analog output current, and includes a control circuit (310) which generates controlled...
5670951 Radio communication device and method for generating threshold levels in a radio communication device for receiving four-level signals  
A symbol detector (110) includes an analog-to-digital converter (115) for converting signal voltages to digital values and peak and valley counters (310, 315) for tracking the digital values to...
5661480 Analog-to-digital converters with reduced power and area using offset current compensation  
An integrated circuit is disclosed including an analog-to-digital (A/D) converter having an offset source for providing an offset signal; and a first reference array including a plurality of cells...
5614904 Balance companded delta conversion for homodyne receiver  
A balanced delta-modulation analog-to-digital conversion circuit is disclosed. A first principal integrator produces a first output signal which rises when a first control signal is generated and...
5554988 Apparatus and method for generating a data signal  
An apparatus is provided for generating a multiple-level amplitude modulated data signal. The circuit provides accurate data signal level control while minimizing transient errors. A controlling...
5323159 Digital/analog converter  
A D/A converter divides an input digital data into at least two overlapping digital ranges. The data in the two ranges are converted separately from digital to analog by a low-range and a...
5296857 Digital to analog converter with precise linear output for both positive and negative digital input values  
A circuit and method for converting a digital number to an analog output signal, wherein the most significant bit or "sign" bit of the digital number is used for switching the accumulated currents...
5289191 Bipolar analog-to-digital conversion apparatus with unipolar current and voltage modes  
An integrated circuit incorporating an analog-to-digital (A/D) conversion subsystem having a current mode in which only negative analog currents are converted and a voltage mode in which only...
5283583 High-speed A/D conversion using a series of one-bit conversion stages  
In an analog-to-digital converter, one-bit A/D conversion stages are connected in series to receive an analog signal. Each conversion stage includes a sample-and-hold circuit for sampling an analog...
5241312 High resolution analog to digital converter  
A high resolution analog to digital converter is provided which operates at a relatively high speed. The converter will operate in either a bipolar or unipolar mode and the bipolar mode includes a...
5227791 East high-bit one step electronic analog-to-digital converter  
The converter input i is connected through a comparator to the polarity bit output as well as to the input of a full-wave precision rectifier in the first quantization stage, which like further...
5182561 Integrated converter with gate for supplying integrating dock pulses to counters only during reference signal integrating period  
An integrated A/D converter includes an integrator 8integrating reference signals in synchronism with an integration start signal, and counters for counting integrating clock pulses until the...
5157400 Automatic reference voltage controller of integral analog/digital converter  
An automatic reference voltage controller of an integral A/D converter comprises a reference voltage switching circuit, an input voltage switching circuit, a Miller integrator, a comparing circuit,...
5128674 Two quadrants high speed multiplying DAC  
A multiplying digital-to-analog converter for multiplying a bipolar input current by a digital word A having N bits a i including a current adder for adding a constant current to the bipolar input...
5119094 Termination circuit for an R-2R, ladder that compensates for the temperature drift caused by different current densities along the ladder, using one type of biopolar transistor  
A termination circuit for an R-2R ladder network for producing weighted currents, the 2R terminating resistor of the ladder being connected to an excitation source voltage which is 2(kT/q)ln 2...
5010339 Ultra linear spectroscopic analog-to-digital converter  
A sliding scale averaging technique is employed for an analog-to-digital converter. An analog signal is summed with a varying number prior to conversion. This causes repeated input voltage signals...
4982192 Digital-to-analog converter having common adjustment means  
A digital-to-analog converter which includes a digital-to-analog conversion circuit of the current output type, a current-to-voltage conversion circuit receptive of an analog current produced form...
4978959 Analog to digital converter, a digital to analog converter and an operational amplifier therefor  
An operational amplifier is provided and includes at least two input terminals of one polarity and another input terminal of the opposite polarity. The amplifier includes an amplifying portion...
4973973 Code converter and encoder for converting a unipolar binary coded signal into a bipolar binary coded signal  
A code converter includes an extraction device for extracting a reference level from a binary-coded input signal, which is offset at a predetermined voltage level and which varies arbitrarily with...
4972188 Push pull double digital-to-analog converter  
A push pull digital-to-analog converter circuit configuration improves the signal-to-noise ratio when used in the common bipolar (both positive and negative) mode of operation, thereby improving...
4937578 D/A converter for digital signals represented by a 2's complement  
A digital-to-analog (D/A) converter for converting a n-bit digital 2's complement signal to an analog signal. The D/A converter consists of a controller, a capacitor array, and a switch array. The...
4926174 Digital voltmeter  
A digital voltmeter which converts an input signal having an amplitude to be measured into a digital signal from which a series of pulses is developed having a duty cycle which is proportional to...
4891645 Digital-to-analog converter with on-board unity gain inverting amplifier  
The invention provides a monolithic Y-bit resistive-ladder type digital-to-analog converter (DAC) having a unity gain inverting operational amplifier as an input buffer to the resistive ladder...
4837572 Digital-to-analog converter  
An ultra-fast high resolution digital-to-analog converter (DAC) converts a digital input code into a corresponding analog output voltage. The DAC has an inherent low impedance bipolar output. In...
4766417 Automatic offset compensating bipolar A/D converter circuit  
An automatic offset compensating bipolar A/D converter circuit includes an A/D converter and a feedback circuit, which automatically compensates offset error between a specific level of input...
4683458 Current-steering digital-to-analog converter for providing bi-directional currents through a load  
A digital-to-analog converter capable of bi-directional output currents which is especially useful for direct conversion of digitally encoded audio signals. The converter is made up of a plurality...
4673916 Method and system for decoding a digital signal using a variable frequency low-pass filter  
In a data compression system, a digital signal comprising a series of digital samples and a sampling datum indicating the sampling interval of the digital samples are written into a read-write...
4636773 Binarily weighted pulse width digital-to-analog converter  
A digital-to-analog converter system for converting a digital input signal having parallel words, each word including multi-bit groups of weighted significance, and which is provided at an input...
RE32313 Digital-to-analog converter and PCM encoder using the converter  
A PCM encoder for converting a voice signal into a eight-bit code by approximating the μ-low characteristic where μ=255 with 15 segments comprises a capacitor array circuit including eight...
4618852 Monotonic A/D converter which minimizes circuitry for high order bit conversion  
An N bit converter, where N is an integer, is provided for effecting A/D and D/A conversions by utilizing a capacitor array and a resistor voltage divider string. The converter may be linear or...
4590459 Analog/digital converter  
A digital integrator (1) having a 16-bit output is followed by a first 12-bit digital/analog converter (2a) which is supplied with the output bits 1-11 and 16 of the integrator (1) and which forms...
4580127 Circuit for converting analog bipolar signals to digital signals  
An A/D converter includes a limiting circuit for limiting the amplitude of bipolar input signals. A comparator compares the amplitude limited signals with reference voltages and provides pulse...
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...
4488144 High linearity digital to analog converter  
A digital-to-analog converter having high linearity about zero utilizes a magnitude/sign input code and comprises in combination a single unipolar digital-to-analog converter, a broad bandwidth,...
4473818 Bipolar digital to analog converter  
A bipolar digital to analog converter having a pair of identically configured digital to analog networks, the outputs of which are summed. The input of these networks are connected by an...
4471340 Analog to digital converter  
A device for converting a signal voltage into a multi-bit digital word that efines the voltage magnitude and polarity. The input voltage V to be digitized is used to control the frequency of a...
Matches 1 - 50 out of 208 1 2 3 4 5 >