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6747583 COMPENSATING CIRCUIT FOR USE IN A SWITCH CIRCUIT COMPRISING SCALED CURRENT STEERING SWITCHES, A SWITCH CIRCUIT COMPRISING THE COMPENSATING CIRCUIT, AND A METHOD FOR MINIMISING TIME-SKEW IN SWITCHING SCALED CURRENT STEERING SWITCHES  
“A compensating circuit for use in a switch circuit comprising scaled current steering switches, a switch circuit comprising the compensating circuit, and a method for minimising time-skew in...
6747585 Method and apparatus for increasing a dynamic range of a digital to analog converter  
A digital to analog converter with increased dynamic range and improved linearity and method therefore includes an input ( 109 ) coupled to a digital word; a circuit, such as a typical digital to...
6744392 Noise shapers with shared and independent filters and multiple quantizers and data converters and methods using the same  
A noise shaper including first and second quantizers and first and second feedback paths each providing feedback from a corresponding quantizer output. A loop filter system implements a plurality...
6744393 Low cost multi-range input circuit for industrial analog input modules  
Analog input module for a programmable logic controller, the analog input module having an input circuit with terminals for accepting either a single voltage range or a single current range from...
6744390 Analog to digital converter utilizing resolution enhancement  
An analog to digital converter for input signals having a low frequency component (such as DC) upon which is superimposed an AC component, the magnitude of the AC component being less than or equal...
6742062 Information reproduction apparatus and information reproduction method  
An information reproduction apparatus which can perform repetitive reproduction is provided. In the apparatus, Information read from an information recording medium is decoded by the plurality of...
6738000 Calibration method for a digital-to-analogue converter using an array of current sources  
A current source DAC has calibration of the current sources used for providing the analog output. There are two outputs, one of which provides the output current or else a differential output is...
6731231 Analogue to digital converter  
A pipeline/subranging architecture is used to provide a circuit for analog to a digital conversion. A course analog to digital converter, a fine analog to digital to converter, combining logic...
6724331 Adaptive digital spectral compensation and calibration of analog components and transceiver chains  
According to one aspect of the invention, an apparatus is provided which includes one or more analog components, an analog to digital (A/D) converter, and a spectral compensator. The operational...
6724329 Decision feedback equalization employing a lookup table  
A decision feedback equalizer includes a lookup table device. The lookup table device may include a shift register and memory, or may include multiple shift registers and memories. Near-end...
6720896 Analog/digital or digital/analog converter having internal reference voltage selection  
An A/D converter or D/A converter has an internal voltage selection device. Several reference voltages are available for selection by the selection device, which selects a voltage based on a...
6720895 Method of calibrating an analog-to-digital converter and a circuit implementing the same  
A method of calibrating a high-speed analog to digital converter and an ADC that implements the method. Multiple linear regression analysis is used to calibrate the stages of a pipeline ADC to...
6717536 Selective background calibration for A/D converter  
An A/D converter calibration apparatus includes a set of operating condition parameter sensors ( 100 ) for detecting the current operating conditions, which are represented by parameters x 1 , . ....
6714886 System and method of DC calibration of amplifiers  
A compensation system for calibrating an amplifier having a compensation input including a sigma delta converter, a counter, a memory, adjust logic, a DAC, a pair of compensation capacitors, and a...
6710727 Correction system and method of successive approximation A/D converter  
The present invention provides a correction system and method for a Successive Approximation A/D Converter (SA-ADC) of the prior art. The operation method of the correction system is described in...
6707404 Integral nonlinearity error correction circuitry and method for DAC  
An M+N bit DAC includes an N-bit interpolation circuit for interpolating between a first voltage (Vhigh) on a first conductor ( 17 A) and a second voltage (Vlow) on a second conductor ( 17 B), an...
6707402 Method for converting an analog signal to a digital signal  
With a method for converting an analog input signal (S 1 ) to a digital output signal (S 7 ), the analog input signal (S 1 ) is amplified in a first signal path ( 2, 3, 5 ) and is subjected to an...
6707403 Analog to digital converter with a calibration circuit for compensating for coupling capacitor errors, and a method for calibrating the analog to digital converter  
An ADC ( 1 ) of balanced architecture for determining a digital word corresponding to a sampled voltage of an input signal from an input line ( 33 ) comprises a first capacitor circuit ( 2 )...
6703951 Analog to digital converter with encoder circuit and testing method therefor  
A high speed A/D converter includes a series of encoder sections for converting a thermometer code to a gray code and an error signal production section for detecting a babble error in the gray...
6704673 System and method for improving linearity and reducing digitization artifacts in a data analysis system  
A system and method for improving linearity of data outputted from an analog-to-digital converter and reducing digitization artifacts, is provided. A noise generator is provided for generating...
6703952 Testing analog-to-digital and digital-to-analog converters  
Testing of analog-to-digital and digital-to-analog converters formed in integrated circuits. In one embodiment, a method of testing an analog-to-digital (A/D) converter comprises applying an analog...
6700521 Interpolating function generating apparatus and method, digital-analog converter, data interpolator, program, and record medium  
A digital input is 8-fold oversampled, delay circuits 11 −1 to 11 −4 and multipliers/adders 12 to 15 perform a convolution arithmetic while multipliers/adders 4 to 10 process the...
6700524 A/D converter for performing pipeline processing  
An A/D converter comprises a pipeline stage array in which plural pipeline stages are connected in series, each pipeline stage performing a pipeline operation on an inputted analog voltage to...
6700516 Mixer-based timebase for signal sampling  
Signal sampling is performed. A sampler takes samples of a sampled signal. A first analog-to-digital (A/D) converter receives the samples from the sampler. A clock reference is synchronous with the...
6700515 Digitizer apparatus and semiconductor testing apparatus  
An interleaving AD conversion type waveform digitizer apparatus includes, in a case where the number of interleaving ways is N that is equal to or larger than two, N AD converters connected to a...
6696997 Using single lookup table to correct differential non-linearity errors in an array of A/D converters  
Generation of a single look-up table for performing DNL correction on an array of analog-to-digital converters (ADCs) is disclosed. Initially, the analog input voltages to the array of ADCs are...
6693572 Digital tuning scheme for continuous-time sigma delta modulation  
Systems and methods are described for a digital tuning scheme for continuous-time sigma-delta modulation. The method includes integrating a voltage from a voltage source using a discrete-time...
6693570 Digital-to-analog conversion circuitry incorporating a simplified testing circuit  
Digital-to-analog (DA) conversion circuitry with a simplified testing circuit includes a DA converter to which test data, initially “0”, may be applied. The DA converter feeds an analog voltage...
6690311 Adaptively calibrating analog-to-digital conversion with correction table indexing  
Methods, systems, and arrangements enable true wide-band calibration of analog-to-digital conversion (ADC) using correction table indexing. The frequency of an analog input signal that corresponds...
6690310 Method and apparatus for adaptively compensating for an inaccuracy in an analog-to-digital converter  
In an analog-to-digital converter ( 100 ), a method and apparatus compare ( 302 ) an analog input signal ( 102 ) with a reference signal ( 108 ) to generate a decision signal ( 110 ), and sum ( 304...
6680681 High speed FIR transmitter  
A transmitter for driving a transmission medium employs pre-distortion to predistort the signals leaving the driver so that they will have an acceptable shape when they reach their destination and...
6674378 Predictive timing calibration for memory devices  
The present invention provides a unique way of using a 2 N bit synchronization pattern to obtain a faster and more reliable calibration of multiple data paths in a memory system. If the 2 N bit...
6667703 Matching calibration for digital-to-analog converters  
A method and apparatus are provided for calibrating first and second digital-to-analog converters (DACs). The apparatus has a normal input and a test input. A first correction circuit selectively...
6667702 Semiconductor device having DACs and method of testing such semiconductor device  
A semiconductor device equipped with a DAC channel has a test pattern generation means for storing and generating test patters, and a test clock input terminal. The test pattern generation means...
6667705 Analog to digital converter threshold detection circuit  
At least one exemplary embodiment of the present invention includes a device that comprises a microprocessor, a multiplexing analog-to-digital converter integral to said microprocessor, and a...
6664907 Information handling system with self-calibrating digital-to-analog converter  
A self-calibrating video circuit comprises a first and second digital-to-analog converter generating first and second output signals, and a calibration circuit coupled with the first and second...
6664850 Delay variability reduction method and apparatus  
A method for reducing delay variability in a differential receiver includes receiving a plurality of differential input signals, determining a first transition delay time of an output in response...
6661359 Device and method for generating synchronous numeric signals  
A device for generating synchronous numeric signals, including a reference generating device supplying a reference signal and a first timing signal, both having a reference frequency; and a timed...
6657570 Automatic level control for input to analog to digital converter  
An analog to digital conversion circuit is provided. The analog to digital (A/D) conversion circuit includes an input adapted to receive an analog signal. The A/D conversion circuit further...
6658368 On-chip histogram testing  
Circuitry for generating a histogram of output codes produced by an analog/digital converter (ADC) on an integrated circuit chip includes a comparator, disposed on the chip together with the ADC. A...
6653958 Method for compensating non-linearity of a sigma-delta analog-to-digital converter  
The invention concerns a method for compensating the non-linearity of a sigma-delta analog-to-digital converter (A 2 ) with quantization at N levels comprising a digital-to-analog converter ( 24 )....
6653893 Voltage margin testing of a transmission line analog signal using a variable offset comparator in a data receiver circuit  
A data receiver circuit having a comparator that exhibits substantially variable offset that is controllable to represent a variable reference level, without a separate input to receive a reference...
6650262 AD converter evaluation apparatus  
An AD converter evaluation apparatus evaluates an AD converter, which includes a first programmable power supply, a second programmable power supply, an attenuator circuit, an addition circuit, and...
6646582 Error compensation for sigma-delta modulated digital signals or the like  
A noise control system for use in an SACD player in order to compensate for errors in the recovered delta-sigma modulated audio signal in which each sample of the original analog signal is...
6646583 High speed digital to analog converter using multiple staggered successive approximation cells  
An image sensor system using offset analog to digital converters. The analog to digital converters require a plurality of clock cycles to carry out the actual conversion. These conversions are...
6642869 Piecewise linear calibration method and circuit to correct transfer function errors of digital to analog converters  
A calibrated digital-to-analog converter (DAC) ( 15 ′) has a main DAC ( 17 ) having a digital input and an analog output. An on-chip memory ( 21 ) stores measured INL values of the main DAC at a...
6642868 Apparatus and method for the 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...
6642870 Method and device for integrated testing for an analog-to-digital converter  
A device for self-testing of an analog-to-digital converter includes elements for applying to the converter test signals and analyzing elements. The analyzing elements include common resources (...
6642871 Analog/digital converter with error automatic calibration function  
The present invention relates to an analog/digital converter including an analog conversion unit including a plurality of stages having a pipelined configuration and a digital conversion unit. The...
6642859 Accurate and efficient calibrating device and method  
An apparatus and method of calibrating a signal sourcing device having a plurality of signal sources to reduce errors between signals generated by the signal sources by categorizing the signal...
Matches 401 - 450 out of 1003 < 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >