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8183856 |
System including signal offset estimation
A system includes a first circuit configured to convert a first analog signal to a first digital signal. The system includes a second circuit configured to determine an area of the first digital...
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8184027 |
Semiconductor device and differential amplifier circuit therefor
A differential amplifier circuit comprising a differential amplifier capacitor and a mismatch error cancellation circuitry, a first pair of capacitors, a second pair of capacitors consisting of...
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8179294 |
Apparatus and method for the calibration of delta-sigma modulators
The application relates to a calibration apparatus and calibration method for a tuneable resonator of a delta-sigma modulator of the continuous time, band pass type. The calibration apparatus...
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8174421 |
Information processing apparatus
An information processing apparatus, includes: a plurality of processor means respectively including storage means for storing analog information and comparison means for comparing analog...
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8174423 |
Pipelined analog-to-digital converter and sub-converter stage
The present invention introduces a sub-converter stage used in a pipelined analog-to-digital converter. The sub-converter stage comprises an amplifier with a gain A, a sub analog-to-digital...
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8174422 |
Power-supply-noise cancelling circuit and solid-state imaging device
A reference voltage generation circuit generates a reference voltage and outputs it to an amplifier reference voltage line. A power-supply-noise adding circuit adds power supply noise superimposed...
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8174416 |
Automatic common-mode rejection calibration
The present invention relates to a circuit and a method for automatic common-mode rejection calibration in a differential conversion system and unbalance compensation for balancing the operation...
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8174417 |
System and a method of correcting baseline wander
A system and method of correcting baseline wander (BLW) are disclosed. An analog-to-digital converter (ADC) converts an analog input to a digital output, and a slicer maps the digital output to one...
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8169498 |
Nonlinear error correction processor for an image sensor
An image pickup device is provided, capable of complete correction with data of once analog-to-digital conversion, and prevention of excess use of switches and analog devices and/or erroneous...
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8169349 |
Communication device and noise cancellation method
A communication device and the method thereof are disclosed in embodiments of the present invention. The communication device includes a level determining module, an digital to analog converter and...
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8164496 |
Mismatch compensators and methods for mismatch compensation
In a compensator for compensating mismatches, and in methods for such compensation, the compensator compensates for mismatches in output signals of a system with mismatches during normal operation...
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8164504 |
Successive approximation register analog-digital converter and method for operating the same
A successive approximation resistor analog digital converter (SAR ADC) includes a first conversion unit including a correction capacitor array and a bit capacitor array 2V-1 less than the number of...
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8164501 |
Method and system for time interleaved digital to analog conversion for a cable modem
Provided is a transmitter in a communications system including a plurality of digital to analog converters. Also included is a plurality of clocks, each being communicably coupled to a...
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8164495 |
Integrated non-linearity (INL) and differential non-linearity (DNL) correction techniques for digital-to-analog converters (DACS)
INL values are determined for a plurality of sub-segments of a DAC that is adapted to accept N bit digital input codes, and a first set of correction codes that can be used to reduce to a range of...
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8164494 |
Method and device for digitally correcting DC offset
There is provided a digital Direct Current (DC) offset correction method and device. The device includes a digital-analog converter charging a load capacitor according to an input code value and...
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8159272 |
System and method for on-chip jitter and duty cycle measurement
An apparatus for measuring time interval between two selected edges of a clock signal. includes an edge generator, a first multi-tap delay module, a second multi-tap delay module, and a...
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8159377 |
System, method, and circuitry for blind timing mismatch estimation of interleaved analog-to-digital converters
A timing skew estimation system is disclosed that includes a plurality of interleaved analog-to-digital converter circuits (ADCs), a timing mismatch estimation unit, and a correction unit. The...
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8159378 |
Analog-to-digital conversion method using RC time constant calibrator and analog-to-digital converter therefor
An analog-to-digital conversion method using an RC time constant calibrator is provided. The method includes the operations of comparing a crossing time point at which a first reference signal and...
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8159381 |
Glitch free dynamic element matching scheme
A dynamic element matching (DEM) scheme is implemented in a crawling code generator for converting a b-bit binary input code into a (2b−1)-bit digital output code. A random generator determines f...
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8144041 |
Electronic device
An electronic device includes a frequency variable circuit, a filter, and an output voltage decision circuit. The frequency variable circuit changes the sampling frequency of an analog-digital...
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8144040 |
Randomization of sample window in calibration of time-interleaved analog to digital converter
A technique that randomizes a sample window over which one or more interleave mismatch corrections are made to a time interleaved analog to digital converter (TIADC).
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8134485 |
Device for converting analog signal into digital values and correcting the values
An analog to digital converting device has a first converter nonlinearly converting an analog level into a first digital value every first sampling period, shorter than a second sampling period,...
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8130323 |
Closed loop DAC calibration
A video signal processing system including a digital signal processing (DSP) module, a digital offset module coupled to the DSP module, a gain module, and a digital to analog converter (DAC)...
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8125360 |
On-chip calibration method
A system for the calibration of a programmable system-on-a-chip is described. More specifically, embodiments of the present invention relate to a system that calibrates a programmable analog block...
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8125359 |
Analog-to-digital converter
According to an embodiment, an analog-to-digital converter (ADC) including an ADC unit, a clock-phase control unit, a multiplexer, and a digital-output processing unit is provided. The...
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8120517 |
Digital-analog conversion circuit and output data correction method of the same
A digital-analog conversion circuit includes a correction unit that adds a correction bit to a lower-order bit of externally input first digital input data and outputs second digital input data,...
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8115662 |
Sampler linearity by simultaneous derivative sampling
A circuit for improved sampler linearity, in an analog to digital converter, by taking simultaneous analog samples of an input signal V(t) and its derivative, dV/dt. The correction can be...
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8115663 |
Mismatch-immune digital-to-analog converter
In an embodiment, a digital-to-analog converter (DAC) includes inputs for receiving first and second signals encoded as a digital signal pair including overlapping low value portions that are...
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8106803 |
Discharge digital-to-analog converter
A digital-to-analog conversion circuit operates by selectively discharging members of a plurality of capacitors. Charging of the capacitors occurs during a reset period while digital-to-analog...
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8106800 |
Self-calibrating signal reconstruction system
An approach for calibrating a signal reconstruction system. A signal may be input to a low-pass filter. An output of the filter may be converted to a digital signal which goes to a processor which...
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8108167 |
Method for ascertaining the harmonic components of an analog electrical signal at a fundamental frequency which changes over time
A method includes ascertaining harmonic components of a periodic analog signal at a fundamental frequency which changes over time. The signal is digitized and fast Fourier transformed. A target...
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8102290 |
Sigma-delta modulator
The present invention relates to a sigma-delta modulator to convert an analog signal into a digital signal using an analog-to-digital converter slaved in a closed loop. The undecided bits at the...
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8102293 |
Digital direct conversion receiving apparatus and method
A digital direct conversion receiving apparatus, including: a phase conversion unit to down-convert a Radio Frequency (RF) signal into a plurality of sample signals, and generate a certain phase...
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8094055 |
Compact digital-to-analog converter
A digital-to-analog converter is disclosed. An example digital-to-analog converter circuit includes a reference scaling circuit coupled to receive a first reference current. The reference scaling...
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8094056 |
Analog-to-digital converter
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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8089382 |
Sampling/quantization converters
Provided are, among other things, systems, methods and techniques for converting a continuous-time, continuously variable signal into a sampled and quantized signal. According to one representative...
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8089380 |
Voltage mode DAC with calibration circuit using current mode DAC and ROM lookup
The invention is a novel scheme of calibrating a voltage-mode digital to analog converter using a current-mode digital to analog converter. A DAC system is comprised of a voltage-mode DAC with an...
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8085175 |
Linearizer
The present invention provides an advanced adaptive predistortion linearization technique to dramatically reduce nonlinear distortion in power amplifiers over a very wide instantaneous bandwidth...
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8085329 |
Solid-state imaging device, driving control method, and imaging apparatus
A solid-state imaging device and an imaging apparatus are provided. The solid-state imaging device performs an AD conversion in a column parallel for an analog pixel signal outputted from each of...
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8085174 |
Current-mode DAC capable of prospective correction
A current-mode DAC includes at least one to-be-corrected one current source, a referential current source, a current comparator for comparing the current of the to-be-corrected current source and...
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8077816 |
Fast predictive automatic gain control for dynamic range reduction in wireless communication receiver
A method of fast predictive automatic gain control is disclosed including estimating channel gain applied to a received signal, predicting channel gain at a subsequent time by applying temporal...
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8077065 |
Data processing device and data processing system
In AD conversion of a voltage under measurement, data continuity is ensured between the result of conversion after amplification by using an amplifier circuit and the result of direct conversion...
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8077068 |
Quantizer, analogue-to-digital converter comprising such a quantizer, and ultra-wide band receiver integrating such a converter
The invention relates to an N-bit asynchronous Quantizer including a 2N−1 signal amplifier stages (G12-G2N−12) arranged in series, the input of the first stage being capable of receiving a sig...
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8072362 |
Modulator with loop-delay compensation
A modulator is constructed with a loop-delay compensation. A delta-sigma modulator generates a quantization code, and a digital compensation filter receives the quantization code and outputs a...
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8072360 |
Simultaneous sampling analog to digital converter
The invention is a novel scheme of performing an analog to digital conversion of simultaneous sampled analog inputs using multiple sample and hold circuits and a single successive approximation...
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8072527 |
Solid state image sensing device
A column A/D converter includes two column A/D converting elements. Each of the column A/D converting elements is operable to divide a pixel signal read out from a pixel array into two blocks i.e....
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8068044 |
Correction circuit for D/A converter
There is provided a correction circuit for a D/A converter, comprising: a constant current source to be connected between high- and low-potential power source lines for supplying a power source...
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8068045 |
Calibration methods and structures for pipelined converter systems
Calibration methods and structures are provided for pipelined analog-to-digital converter systems. They are arranged to process samples of the digital codes with an algorithm that is preferably...
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8063803 |
Calibration of offset, gain and phase errors in M-channel time-interleaved analog-to-digital converters
Techniques for correcting component mismatches in an M-channel time-interleaved Analog to Digital Converter (ADC). In order to obtain an error measure for offset, gain or phase, errors, outputs...
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8063807 |
Equalization circuitry including a digital-to-analog converter having a voltage divider and a multiplexer
An equalization circuitry that includes a digital-to-analog converter having a voltage divider and a multiplexer coupled to the voltage divider is described. In one implementation, the...
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