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6373415 Digital phase compensation methods and systems for a dual-channel analog-to-digital converter  
Phase compensation in a dual-channel analog-to-digital converter (ADC) is accomplished by holding conversion results in programmable length registers for controllable time periods. A dual-channel...
6373424 Method and apparatus for obtaining linearity in a pipelined analog-to-digital converter  
A pipelined analog-to-digital converter system ( 10 ) is responsive to an analog input signal ( 18 ). The system includes four pipeline stages ( 11-14 ), which each produce a respective digital...
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...
6369744 Digitally self-calibrating circuit and method for pipeline ADC  
A pipeline ADC includes an input stage and a first group of subsequent stages, wherein the input stage includes a unity gain amplifier having an input for receiving an analog input signal, an...
6366228 Selecting circuit, digital/analog converter and analog/digital converter  
A pair of internal signals are generated by halving a 3-bit 5-valued input signal, neglecting the least significant bit LSB. If the input signal shows the value of an odd number, 1 is added to...
6362768 Architecture for an input and output device capable of handling various signal characteristics  
An Input/Output device has programmable signal conditioning and signal control circuitry capable of receiving signals, scaling the received signals to a predetermined voltage range, determining...
6359575 Analog to digital converter having a digital to analog converter mode  
An analog to digital (A/D) converter which includes A/D converter and D/A converter modes. The A/D converter includes an internal digital to analog (D/A) converter (DAC) that may be used in a...
6356218 Correction of DC offset in data bus structures at the receiver  
DC offset introduced into a differential signal is compensated for by DC offset correction circuitry. The DC offset correction circuitry receives a known training pattern of alternating logic high...
6353401 Optical sensor array with zone-programmable gain and offset  
An optical sensor array with zone-programmable gain and offset prior to A/D conversion for reducing quantization noise. The circuit comprises a register file which contains digital words for...
6351228 Digital calibration method and apparatus for A/D or D/A converters  
Digital calibration of an A/D converter, which converts an analog signal into a digital signal, is performed by first sequentially inputting two analog signals of different values to the A/D...
6348885 System and method for digitally calibrating an analog-to-digital converter  
A digital calibration system for an analog-to-digital converter system includes a computational system receiving digital bits from an analog-to-digital converter representing selection of elements...
6348886 Self-calibrating video digital to analog converter  
A video DAC uses a charge pump to maintain a constant peak to peak amplitude within power supply variations over process and temperature, rather than an external reference signal or a band gap...
6339390 Adaptive parallel processing analog and digital converter  
In one aspect, the present invention is directed to a converter for converting a signal from a first format to a second format. The converter includes a decomposition section, a converter array...
6339389 Method of testing analog to digital converters  
A method of analyzing ADCs, comprising providing a test waveform, sampling the test waveform in an ADC at a frequency different from the test waveform, providing the output samples of the ADC to a...
6339388 Mixed analog and digital integrated circuit and testing method thereof  
The constitution of mixed analog/digital integrated circuits and their testing methods are disclosed. These testing methods are aimed at verification and the linearity of D/A and A/D converters....
6333706 Built-in self-test for analog to digital converter  
An on-chip analog to digital converter (ADC) test circuit comprises a waveform generator for developing a known arbitrary waveform. A switch selectively connects the waveform generator to the ADC...
6331830 Self-trimming current source and method for switched current source DAC  
A self-trimming current source for used in a switched current source DAC is made from a fixed current source and a variable current source, which are connected in parallel to provide a total output...
6329936 Statistical adjustment of A/D non-linearities to correct intensity ARI  
Spurious artifacts in intensity emulation caused by measurement non-linearities within a statistically created raster display are reduced or eliminated by first characterizing the non-linearities....
6323791 Control systems and methods for reducing residue signal offset in subranging analog-to-digital converters  
Feedback control systems and methods are provided for correcting residue signal offset errors in subranging ADCs. The systems and methods eliminate clock-to-clock offset changes and reduce noise...
6323792 Method for correcting analog-to-digital converter (ADC) errors, and apparatus embodying same  
A method for correcting output codes produced by an analog-to-digital converter (ADC), and an apparatus embodying the method. The method includes receiving a digital output code i produced by the...
6320528 Built-in self test for integrated digital-to-analog converters  
A circuit arrangement and method for testing the differential non-linearity (DNL) of a digital-to-analog converter (DAC) determines whether the digital-to-analog converter has an analog output that...
6320525 Analog-to-digital level error automatic calibration circuit  
Provided is an analog-to-digital level error automatic calibration circuit according to the invention. The analog-to-digital level error automatic calibration circuit includes a calibration switch...
6313769 Baseband digital offset correction  
A signal processing system includes a main digital-to-analog converter (DAC) for receiving a digital baseband signal and converting the digital signal into an analog signal. Also included in the...
6313780 Analogue to digital converter  
A current mode pipelined analogue to digital converter (ADC) has a plurality of serially connected conversion stages. Each conversion stage has an input (40) for receiving a sampled and held...
6313770 System for sampling an analog signal and method thereof  
In accordance with a specific embodiment of the present invention, a system is disclosed having an analog to digital converter and control module. The analog-to-digital converter includes an analog...
6313775 Delta-sigma modulator with two-step quantization, and method for using two-step quantization in delta-sigma modulation  
A delta-sigma modulator for converting an analog input signal into a digital output signal comprises a modulator input (501) and a first analog to digital converter (504) coupled to the modulator...
6308139 Digital process for determining the effective value of a periodic electric test signal  
A digital process for determining the effective value of a periodic electric test signal is provided, where the test signal is sampled during a sampling interval that differs in duration from the...
6304205 A/D multi-channel pipeline architecture  
An apparatus and method for A/D conversion is provided. The apparatus provides for multi-path multi-channel (MPMC) pipelined A/D conversion. Unlike prior art designs in which the handling of...
6300889 System on chip with ADC having serial test mode  
A system on chip with ADC having serial test mode. An integrated circuit having a processing system with a system clock and a data conversion circuit is provided that is operable to convert data...
6297757 Method and circuit for testing an analog-to-digital converter module on a data processing system having an intermodule bus  
A data processing system (20) includes a plurality of modules (44, 48) and an analog-to-digital converter (ADC) (46). The ADC (46) includes at least one port terminal (66) for transmitting test...
6288667 Low power analog-to-digital converter  
A low power analog-to-digital converter generates, during a calibration process, a plurality of digital control words as a function of non-linearities in the circuit components. These predetermined...
6285304 Analog-to-digital converter circuit and control device for a gradient amplifier of a magnetic resonance imaging system  
In an analog-to-digital converter circuit and a control device for a gradient amplifier, an analog difference signal is determined from an analog input signal and an analog converter signal. An...
6281818 Automatic auto-calibration system  
An automatic calibration system (10) for use with an A/D or D/A converter circuit (12). A reference (18) provides one or more reference signals (20) such that a controller (26) can determine...
6281819 Device for ENOB estimation for ADC's based on dynamic deviation and method therefor  
Disclosed are a device and method therefor for ENOB (effective number of bits) estimation for an ADC (analog-to-digital converter) based on dynamic deviation, wherein the correlation between...
6278394 Signal processing circuit and method of operation  
An analog-to-digital or digital-to-analog system contains a converter (706). The converter is supplied with a clock signal (CLK1) at a frequency fs derived from a crystal of a frequency fs/N. The...
6268813 Self-test for charge redistribution analog-to-digital converter  
An analog-to-digital converter has a binary weighted capacitor array with one plate of each capacitor connected at an input to a comparator and successive approximation logic circuitry provided for...
6259393 Semiconductor integrated circuit and driving method using comparator feedback loop to switch subtraction bypass circuit  
In order to solve the problem of increase in circuit scale and increase in power consumption due to use of a DA converter, a semiconductor integrated circuit comprises a signal amplifier 2, 10...
6260085 Changeover device which uses both analog and digital signals as input signals and supplies an analog output signal  
The invention relates to a changeover device which uses both analog and digital signals as input signals and supplies an analog output signal. The changeover device contains a digital-to-analog...
6259389 System for designing and testing a sigma-delta modulator using response surface techniques  
The present invention provides a method and apparatus which uses data containing non-linearity information regarding the integrator circuits used in over-sampled Analog-to-Digital Converters to...
6255976 Low-frequency noise removing method and a related CMOS sensing circuit  
An intentional offset value is set beforehand. The intentional offset value is larger than a sensing objective signal "sig." A measuring device is provided for measuring the intentional offset...
6255971 Analog-to-digital conversion arrangement using input interchanging and post-processing to provide better linearity  
In an A/D conversion, digital codes (DC) are obtained on the basis of respective comparisons (A) between an input signal (IN) and at least one reference level (REF). In order to improve the A/D...
6255978 Serial pipeline DAC with Gamma correction function  
A method and apparatus for converting digital input signal to analog voltage are disclosed herein. The converting apparatus includes the following devices device. One of the pair of reference...
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...
6239732 One-wire device with A-to-D converter  
A low power integrated circuit having analog to digital conversion circuitry capable of receiving a plurality of analog signals and converting them to a digital value. The digital value is then...
6232897 System and method for calibrating an analog to digital converter through stimulation of current generators  
A system and method for calibrating an analog to digital (A/D) converter. The A/D converter includes an internal D/A converter, wherein the internal D/A converter includes a plurality of current...
6232904 Scanning system for film recorder  
A scanning system for a film recorder utilizes multiple digital-to-analog converters (DACs) to produce a linear output for a vertical deflection circuit which drives a vertical yoke circuit for...
6232900 Second order digital filter requiring only one sigma delta modulator  
A 2 nd order digital filter requiring only one sigma delta modulator is created by implementing (1) a 2 nd order feedforward term created by the cascade of two 1 st order elements; (2) a 2 nd ...
6232898 Digital self-calibration scheme for a pipelined A/D converter  
A digital self calibration scheme for pipelined AD converters. The scheme can correct for capacitor mismatch, capacitor non-linearity, amplifier gain and amplifier non-linearity.
6229466 Digital calibration method and apparatus for multi-bit delta-sigma D/A converter  
A system and method for calibrating a multi-bit feedback quantizer in a delta-sigma modulation system. A digital data pattern corresponding to a particular DAC code of a multi-bit digital-to-analog...
6229465 Built in self test method and structure for analog to digital converter  
A method and structure for testing an A to D converter containing a plurality of discrete components is provided. The testing methodology includes dividing the circuit into a number of segments of...
Matches 601 - 650 out of 1003 < 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 >