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7633418 |
Sigma-delta modulator and an output rate reduction method thereof
A sigma-delta modulator and an output rate reduction method are disclosed. The sigma-delta modulator comprises an integrator, an analog-to-digital converter, and a controller. An input signal is...
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7629917 |
Integrator and cyclic AD converter using the same
The present invention provides a cyclic AD converter that reduces power consumption by reducing active circuits such as an X2 amplifier or the like and is particularly suitable to implement in an...
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7630464 |
Analog-to-digital systems and methods
Systems and methods are disclosed herein to provide analog-to-digital interface techniques. For example, in accordance with an embodiment of the present invention, an integrated circuit includes an...
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7629905 |
Analog correction of a phase-mismatch in high-sample rate time-interleaved analog-to-digital converters
A method of phase mismatch correction in high-sample rate time-interleaved analog-to-digital converters (ADC) is provided. An ADC parallel array has an output signal that is processed by a...
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7629906 |
Circuit and method for calibrating direct current offset
A circuit and a method for calibrating the direct-current offset in the signal output from a signal processing unit are provided. The calibration circuit includes a 1-bit quantizer, a control logic...
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7626529 |
Method for digitizing an analog quantity, digitizing device implementing said method, and electromagnetic radiation detector integrating such a device
A method of digitizing an analog quantity from an electromagnetic radiation detector including a matrix of juxtaposed elementary sensors, including, for each line or column of the matrix, the steps...
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7626525 |
Feed-forward circuitry and corresponding error cancellation circuit for cascaded delta-sigma modulator
A cascaded delta-sigma modulator includes a first stage delta-sigma modulator ( 10 A) having first adder ( 2 ) followed by first ( 3 ) and second ( 6 ) integrators, a second adder ( 4 ), and a...
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7626530 |
System and method for improving linearity of electronic circuits with mechanical oscillators
A system converts an analog input signal to an output signal in a very linear manner using very low chip area and very low power consumption. The system includes a micro electromechanical...
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7623050 |
Digital calibration loop for an analog to digital converter
A method and apparatus to counter effects of an offset voltage by calibrating an analog-to-digital converter (ADC). A digital calibration loop minimizes the effects of offset voltage to improve ADC...
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7619548 |
Correlated noise and spurious signal reduction
Error introduced by analog to digital conversion of a set of laser pulses can be reduced by shifting the clock reference time associated with the firing of the laser pulse. A timing offset module...
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7616144 |
Resistor ladder interpolation for PGA and DAC
A voltage interpolation circuit includes a resistive ladder connected between ground and a voltage input and having a plurality of resistors with voltage taps between the resistors. An amplifier...
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7609183 |
Analog to digital converter and recording medium
An analog-to-digital conversion apparatus includes an interleaving section that aligns the digital data respectively output from a plurality of analog-to-digital conversion sections and generates a...
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7609192 |
Control of analog to digital conversion for analog I/O boards
A system and method for converting analog signals to digital signals minimize the latency of the analog to digital conversion for real-time systems. The conversion system and method implements the...
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7609184 |
D-A convert apparatus and A-D convert apparatus
Provided is a D-A conversion apparatus that outputs an analog output voltage according to digital input data, which includes a capacitance array main D-A converter that supplies a main voltage...
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7605741 |
Digitally corrected SAR converter including a correction DAC
An analog to digital converter having improved differential non-linearity is provided. The converter has a memory which is used to look up the actual weight or a weight error corresponding to the...
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7602322 |
Analog-to-digital conversion controller, optical receiving device, optical receiving method, and waveform-distortion compensating device
An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol...
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7602327 |
Digitally controllable on-chip resistors and methods
A digitally controllable resistor includes a substrate and at least one digitally controllable resistance stage formed on the substrate. Each of the stage(s) can include a first resistor connected...
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7602321 |
Adaptive composite analog to digital converter
A distortion correcting analog to digital converter (ADC) system includes a plurality of ADCs configured to convert an analog signal to a plurality of digital ADC outputs, wherein the plurality of...
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7602323 |
Digital background correction of nonlinear error ADC's
The invention provides circuits and methods for estimating and correcting nonlinear error in analog to digital converters that is introduced by nonlinear circuit elements, for example one or more...
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7595744 |
Correcting offset errors associated with a sub-ADC in pipeline analog to digital converters
An offset correction circuit examines a residue signal of a stage of a pipeline analog to digital converter (ADC) to determine whether a parameter which could cause offset error, needs to be...
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7592938 |
Analog-to-digital converter and method of gain error calibration thereof
The invention provides an analog-to-digital converter (ADC). The ADC comprises a plurality of stages connected in series, a gain error correction module, and a look-ahead module. Each of the stages...
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7589650 |
Analog-to-digital converter with calibration
An analog-to-digital converter with calibration is provided. The converter includes at least one conversion unit. The conversion unit includes a comparator, a control unit, a count unit, and a...
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7589649 |
Apparatus, method, and system for correction of baseline wander
Apparatuses, methods, and systems for compensating baseline offset in a read channel of an analog storage device. The apparatus generally includes an AC-coupling circuit configured to transfer an...
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7586429 |
Scrambling system for high resolution ditigal-to-analog converter
A scrambling system for a digital-to-analog converter (DAC) includes a DAC that receives a digital input word and a scrambling module that randomly selects at least one of a plurality of current...
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7587647 |
Method for testing analog and mixed-signal circuits using dynamic element matching for source linearization
A method of testing an analog and/or mixed-signal circuit can be used in either a production or a built-in self test environment. The method includes generating an excitation signal for testing by...
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7583210 |
Differential offset correction circuit
An analog-to-digital converter conventionally performing a detection of a differential offset is replaced by a comparator 20 . A reference voltage is input to a terminal on one side of the...
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7579970 |
Timing recovery methods and apparatuses
In a timing recovery method, two consecutive sampling values may be generated based on a sampled input signal. The input signal may be sampled according to a phase interval of a sampling clock. A...
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7576666 |
Jitter correction
A system comprising includes a clock generator module, an analog-to-digital converter (ADC), and a correction module. The clock generator module receives a system clock and generates a digital...
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7576668 |
Reducing the time to convert an analog input sample to a digital code in an analog to digital converter (ADC)
A stage of a pipeline ADC which uses separate pairs of sampling network and amplifier (in a sample and hold circuit (SHA)) to provide inputs to quantizer (which generates a sub-code) and a switched...
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7576676 |
Analog-to-digital converter using lookahead pipelined architecture and open-loop residue amplifiers
A lookahead pipelined ADC architecture uses open-loop residue amplifiers with calibration. This approach is able to achieve a high-speed, high-accuracy ADC with reduced power consumption. In one...
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7576673 |
Increasing the dynamic range of pulse width modulation in analog to digital converters
This disclosure relates to adjusting a limit cycle frequency of a pulse width modulation in an analog to digital converter as a function of an input signal level to increase dynamic range.
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7573408 |
Method and system for correcting switched input A/D converters
A system is described for correcting a switched input A/D converter circuit that performs a plurality of A/D conversions. The system includes an oversampling circuit, a switched input controller,...
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7570182 |
Adaptive spectral noise shaping to improve time to digital converter quantization resolution using dithering
A novel and useful apparatus for and method of improving the quantization resolution of a time to digital converter in a digital PLL using noise shaping. The TDC quantization noise shaping scheme...
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7570185 |
Data acquisition system for medical imaging
A system and a method for converting an analog signal to a digital signal are provided. The technique involves receiving a sampled analog signal, and selecting one of a plurality of segments of a...
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7570181 |
Method and system for input voltage droop compensation in video/graphics front-ends
Methods and systems for input voltage droop compensation in video/graphics front-end systems. The method of an embodiment of the invention captures input voltage information supplied to an...
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7567192 |
Sigma-delta modulator
A sigma-delta modulator for forming a digital output signal representative of the magnitude of an analog input signal, the modulator comprising a modulation unit comprising: a summation unit for...
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7564385 |
Current compensation for digital-to-analog converter
A current compensation circuit and an optimized current compensation circuit are disclosed for a Parallel Resistors Architecture (PRA) digital-to-analog converter (DAC). The circuits are used to...
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7564391 |
Sigma delta modulator summing input, reference voltage, and feedback
A multibit sigma delta modulator for conveting an analog input signal (Vin) into a multibit digital output signal is disclosed. In one embodiment, the multibit sigma modulator includes a first...
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7561086 |
Electronic circuit for the analog-to-digital conversion of an analog input signal
Electronic circuit for the analog-to-digital conversion of the alternative current (AC) component of an analog input signal. The electronic circuit has a coupling device with an input and an output...
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7557357 |
D/A conversion device and method and charged particle beam exposure apparatus and method
The present invention is related to a D/A conversion device, it is provided with a first D/A conversion circuit which receives input of digital data composed of plural bits and outputs a...
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7557743 |
D/A converter
A D/A converter has a reference comparison current generator configured to generate a reference comparison current, a first reference current generator configured to generate a first reference...
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7556206 |
Temperature compensated clock delay closed loop circuit
Embodiments of the present invention provide a temperature compensating circuit. The circuit generally includes a clock element operable to provide an adjustable clock signal, a buffer element...
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7554470 |
Self-calibrating pipeline analog-to-digital converter and method of calibrating a pipeline analog-to-digital converter
A pipeline analog-to-digital converter (ADC) having a digital calibrating circuit is described. The pipeline ADC includes a pipeline converting circuit and a digital calibrating circuit. The...
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7554469 |
Method for gain error estimation in an analog-to-digital converter and module thereof
The invention provides a method for gain error estimation in an analog-to-digital converter. In one embodiment, the analog-to-digital converter comprises a plurality of stages. A series of...
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7551109 |
Method, system and apparatus for dual mode operation of a converter
Methods, systems and apparatuses for operating a converter or other circuits are disclosed. More particularly, in one embodiment a converter or other circuit can be operated in two modes which may...
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7551111 |
Decoder circuit, driving circuit for display apparatus and display apparatus
A decoder circuit configured to output an analog voltage signal according to input digital data includes an operational amplifier, first selection circuit and compensation unit. The operational...
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7551108 |
Inverter system with input signal-processing apparatus and method for the same
An Inverter system includes a comparator unit compares an analog input voltage with at least one voltage threshold to judge a voltage range for the input voltage. A DC-offset unit determines a...
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7548178 |
Method and apparatus for ADC size and performance optimization
A sigma delta analog-to-digital converter (ADC) to convert an analog converter input signal to a digital converter output signal. Multiple integrator stages, including at least a first and a final...
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7545294 |
Method for operating a digital sensor
The sensor has only a first contact ( 1 ) and a second contact ( 2 ). In the first step of the method, current is passed through the sensor element ( 3 ) while simultaneously measuring the measured...
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7541958 |
Error reduction for parallel, time-interleaved analog-to-digital converter
A technique for reducing errors in a PTIC (parallel, time-interleaved analog-to-digital converter) consisting of M ADCs involves sampling an input signal with the PTIC and performing M different...
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