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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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7612703 |
Pipelined analog-to-digital converter with calibration of capacitor mismatch and finite gain error
The present invention relates to an analog-to-digital converter, especially to a pipelined analog-to-digital converter with calibration of capacitor mismatch and finite gain error. Comparing with...
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7612698 |
Test apparatus, manufacturing method, and test method
There is provided a test apparatus for testing a device under test, the test apparatus including: a test signal supplying section that supplies a digital input signal for testing purposes, to the...
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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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7609190 |
Device and method for testing of digital-to-analog converter
A current-steering digital-to-analog converter (DAC) is tested using a test component having a relaxation oscillator with an oscillation frequency based on the output current of the DAC. A series...
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7609185 |
Methods of using predictive analog to digital converters
Methods are disclosed for performing analog to digital signal conversion in shorter time and/or with less power consumption. A predictive guess is supplied as a digital first signal. The digital...
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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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7605736 |
A/D converter and duty control method of sampling clock
An A/D converter comprises a sample and hold circuit receiving a signal and operating based on a sampling clock, an A/D converting circuit converting an output signal of the sample and hold circuit...
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7605728 |
Method for calibrating a multi-bit digital-to-analog converter, multi-bit digital-to-analog converter in which this method is applied and converter provided with such a multi-bit digital-to-analog converter
In a method for calibrating a multi-bit DAC intended, particularly, for application in high-speed and high-resolution ADCs, such as Σ Δ ADCs, and comprising a number of DAC cells, apart from the...
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7603602 |
Built-in self test circuit for analog-to-digital converter and phase lock loop and the testing methods thereof
A BIST circuit for testing both an analog-to-digital converter and a phase lock loop includes a controllable delay circuit, a NAND gate, a dividing circuit, a NOR gate and a charge/discharge...
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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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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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7599826 |
System and method for generating various simulation conditions for simulation analysis
A system for generating various simulation conditions for simulation analysis is disclosed. The system includes: a signal generating module ( 301 ) for generating an N-bit binary sequence...
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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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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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7583211 |
Analog-to-digital conversion circuit
An analog-to-digital conversion circuit and a method for calibrating an analog-to-digital conversion circuit are provided. A digital translation of an analog voltage is analyzed to determine a...
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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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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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7576667 |
Hierarchied calibration circuit
A digital-to-analog converter is described. The digital-to-analog converter converts an m-bit digital signal into an analog signal using m weighted currents, such as m binary-weighted currents. A...
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7570191 |
Methods and systems for designing high resolution analog to digital converters
Methods and systems for designing a high resolution analog to digital converter (ADC) by eliminating the errors in the ADC stages. An error correction architecture and method eliminate the gain...
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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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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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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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7564386 |
Pre-processing data samples from parallelized data converters
An apparatus for pre-processing data samples from parallelized analog-to-digital converters (ADC). An ADC converts an analog signal into N parallel digital data samples that are output on N ADC...
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7561090 |
Focal plane array with serial, variable bit width analog to digital converter
A method and apparatus for a focal plane array with serial, variable bit width analog to digital converter. The focal plane array includes a plurality of pixels and a dynamically reconfigurable...
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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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7561083 |
Testing of analog to digital converters
Methods and apparatus, including computer program products, to test analog to digital converters, are disclosed. In general, data is received that characterizes a first digital code from a device...
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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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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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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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7545295 |
Self-calibrating digital-to-analog converter and method thereof
A digital-to-analog converter improves differential non-linearity by performing a calibration of at least one weighted cell in response to a calibration command. The digital-to-analog converter...
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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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7541954 |
Touch control apparatus and analog-to-digital converting apparatus and method thereof
Disclosed are an analog-to-digital converting apparatus, an analog-to-digital converting method and a touch control apparatus adapted to convert a divided voltage generated according to a power...
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7541953 |
Self-calibrating current source arrays
One apparatus includes an array of current sources, a digital memory, and a calibration circuit. The digital memory is configured to store one set of digital calibration values for each of the...
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7541952 |
Method and apparatus for offset and gain compensation for analog-to-digital converters
A method for determining a gain compensation value for multiple ADCs sums an absolute value of a number of ADC output samples from each of the ADCs that may be collected while the ADCs are in...
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7538708 |
Efficient, selective 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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7538706 |
Mash modulator and frequency synthesizer using the same
A MASH modulator. The MASH modulator receives a fractional input value, generates an integer output value, and comprises three cascaded first order sigma delta modulators (SDMs) each comprising an...
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7538705 |
Offset cancellation and reduced source induced 1/f noise of voltage reference by using bit stream from over-sampling analog-to-digital converter
An over-sampling analog-to-digital converter (ADC) uses a chopper stabilized voltage reference with improved reference voltage offset cancellation and reduced source induced 1/f noise. The chopper...
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7538701 |
System and method for improving dynamic performance of a circuit
A system and method for improving the dynamic performance in an analog-to-digital converter (ADC) by randomizing the differential mismatch. The differential mismatch in an input analog signal is...
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7535390 |
Time-interleaved analog-to-digital converter and self-calibration method thereof
The present invention discloses a time-interleaved analog-to-digital converter (ADC), which includes a first and a second sub-ADC and a calibration module. The calibration module includes a switch...
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7535388 |
Calculation of ADC and DAC errors in LSI chip
A semiconductor integrated circuit includes a bus, a CPU connected to the bus, a DAC having a digital input thereof connected to the bus, an ADC having a digital output thereof connected to the...
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7532139 |
System and method for converting analog values into digital form
A method for converting analog values into digital form comprises comparing a current analog sample value with an analog input value to produce an outcome, generating a count value based on the...
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7528757 |
Circuit and method for generating a set of intermediate voltages
A network for generating a set of intermediate voltages comprising two input ports for feeding two reference voltages. The intermediate voltages are generated by a number of self calibration units...
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7525470 |
Phase control for interleaved analog-to-digital conversion for electronic dispersion compensation
Embodiments include a system for performing dispersion compensation on an electromagnetic signal received over a communication channel, the electromagnetic signal bearing information at a symbol...
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7525465 |
Reconfigurable and adaptive continuous time-sigma delta data converter
A continuous time-sigma delta (CT-SD) data converter comprising a loop filter includes a first integrator having a first loop filter coefficient and a second integrator operatively coupled to the...
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7525460 |
Timing loop based on analog to digital converter output and method of use
A device and process to compensate for asymmetrical qualities of an analog input signal, if present, and generate a timing signal. The timing signal is then used for analog to digital conversion.
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