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9041571 |
Flexible ADC calibration technique using ADC capture memory
Systems and methods are provided for calibrating an analog to digital converter (ADC) using one or more feedback mechanisms. In an embodiment, a capture memory module captures a portion of ADC... |
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9041569 |
Method and apparatus for calibration of successive approximation register analog-to-digital converters
A successive approximation register (SAR) ADC includes an SAR comparator circuit including first and second inputs, a control input, and first and second outputs. The SAR comparator circuit... |
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9041572 |
Testing a digital-to-analog converter
Testing a digital-to-analog converter (DAC), where the test is carried out iteratively for a plurality of digital test signal values, includes: providing the digital test signal to a DAC under... |
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9041570 |
Analog-to-digital converter and analog-to-digital conversion method
An analog-to-digital converter according to the present invention includes first and second analog-to-digital conversion cells (11, 12), control means (10) for, when a mode specifying signal MD... |
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9041565 |
NRZ signal amplifying device and method, and error rate measurement device and method
To set an optimum offset voltage and detect an NRZ signal with a very small amplitude. An NRZ signal amplifying device 2 includes: input-side voltage detection means 13 for detecting a high-level... |
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9030340 |
N-path interleaving analog-to-digital converter (ADC) with background calibration
A system and method are provided of performing background corrections for an interleaving analog-to-digital converter (ADC). An analog input signal s1(t) is accepted having a first frequency f1... |
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9030346 |
Method and apparatus for self-test of successive approximation register (SAR) A/D converter
A single-ended SAR ADC includes an additional capacitor, a self-test engine, and independent control of sample and hold conditions, which allows for quick and accurate testing of the ADC. |
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9030341 |
Compensation for lane imbalance in a multi-lane analog-to-digital converter (ADC)
Various multi-lane ADCs are disclosed that substantially compensate for impairments present within various signals that result from various impairments, such as phase offset, amplitude offset,... |
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RE45493 |
Analog to digital conversion for a CMOS imager
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... |
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9019140 |
System and method for analog to digital (A/D) conversion
In one embodiment, a method for converting an analog input value to a digital output value is disclosed. A successive approximation is performed. The analog input is quantized to a first quantized... |
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9013338 |
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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9013340 |
Protection circuit for analog-to-digital converter, digital power supply, digital signal processing method, processing module, and circuit protection method
A protection circuit includes: a first gain module, configured to receive a first input signal, scale the first input signal according to a first scaling factor, to obtain a first analog signal,... |
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9007242 |
Self-calibrated delta-sigma modulator and method thereof
A delta-sigma modulator and corresponding method are disclosed. In one implementation, the delta-sigma modulator includes a multiplexer for receiving an analog input signal and a common mode... |
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9007253 |
Successive-approximation-register analog-to-digital converter and method thereof
A main ADC (analog-to-digital converter) for converting an analog input signal into a digital data, and an auxiliary ADC for converting the same analog input signal into an auxiliary digital data,... |
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9007251 |
Apparatus and method for converting an analog time domain signal into a digital frequency domain signal, and apparatus and method for converting an analog time domain signal into a digital time domain signal
An apparatus for converting an analog signal into a digital signal includes: two identical analog-to-digital-converters converting the analog signal into first and second digital time domain... |
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9007245 |
Semiconductor device having Analog-to-Digital Converter with gain-dependent dithering and communication apparatus
A semiconductor communication device reduces influence of noise that is produced by applying a dither signal. The semiconductor communication device includes a Delta-Sigma analog-to-digital... |
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9000960 |
High-order and nested redundancies in time-interleaved ADCs
Examples are provided for time-interleaved analog-to-digital conversion with redundancy. The redundancy may include high-order and nested redundancies. An apparatus may include multiple... |
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8994572 |
Analog-digital converter and method for converting analog signal into digital signal
The objective of the invention is to provide an A/D converter that exhibits fewer malfunctions due to variations in manufacturing. An A/D converter (1) of the invention, which is a cyclic type of... |
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8988263 |
Successive approximation register (SAR) analog-to-digital converter (ADC) having optimized filter
A system such as a mechanically tuned radio can have a signal path to receive and process an incoming radio frequency (RF) signal and to provide the processed signal to a first analog-to-digital... |
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8988268 |
Analog-digital converter and analog-digital conversion method
According to the present invention, a successive approximation type analog-digital converter includes: a comparator outputting a result of comparing an analog signal and a reference voltage; a... |
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8981972 |
Background calibration of ADC reference voltage due to input signal dependency
Embodiments of the present invention may provide an analog-to-digital converter (ADC) system. The ADC system may include an analog circuit to receive an input signal and a reference voltage, and... |
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8983000 |
Receiver circuit and method for operating a receiver circuit
A receiver circuit includes a unit configured to determine filter coefficients based on a sampling time error of a received signal and a phase error of the received signal, as well as a filter... |
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8981973 |
Successive-approximation-register (SAR) analog-to-digital converter (ADC) attenuation capacitor calibration method and apparatus
A fixed capacitor is coupled between a top plate of an attenuation capacitor and a variable voltage reference. The error in the attenuation capacitor may be calibrated out with the variable... |
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8981974 |
Time-to-digital converter and control method
A first switching unit configured to switch a first state for inputting a first clock signal input from a first input terminal, and a second state for inputting an output signal of a second delay... |
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8981984 |
Asynchronous to synchronous sampling using an augmented least squares solver
A method, comprising: receiving a plurality of 2-tuples of asynchronously sampled inputs at an asynchronous to synchronous reconstructor; performing a coarse asynchronous to synchronous conversion... |
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8981983 |
A/D conversion circuit, solid-state image sensor, and camera system
An A/D conversion circuit in which a counter is made to be capable of performing counting at both edges of a clock, up/down count values can be switched while the up/down count values are held,... |
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8970758 |
Image pickup device and signal processing method thereof
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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8970408 |
Built-in-self-test for an analog-to-digital converter
A semiconductor chip with a built-in-self-test circuit including a first analog-to-digital converter (ADC) configured to convert an analog input voltage signal received at its input into a digital... |
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8963763 |
Configuring an analog-digital converter
A method for operating an analog-digital converter including a number of charging units, each comprising a switchable capacitor and an associated reference potential source, includes evaluating a... |
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8963754 |
Circuit for digitizing a sum of signals
A circuit for digitizing a sum of a first input signal and a plurality of second input signals has a passive adder that sums the second input signals and outputs a summation signal and a multi-bit... |
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8963750 |
Time-to-digital conversion with analog dithering
There is described a time-to-digital conversion scheme using an arrangement of delay elements based Time-to-Digital Converter, TDC (20), wherein dithering is built in the digital domain and... |
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8957798 |
Artifact-corrected time-interleaved ADC
An artifact-corrected time-interleaved analog-to-digital converter (ADC) for communications signals offers a significant increase in the available sample rate of ADCs by correcting timing and gain... |
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8957796 |
System clock jitter correction
A system and method are provided for frequency multiplication jitter correction. The method accepts an analog reference signal having a first frequency, and using the analog reference signal,... |
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8957805 |
Balanced signal processing circuit and analog-digital conversion circuit
A balanced signal processing circuit includes: a comparator; a first capacitor having a first end connected to a non-inverting input terminal of the comparator; a second capacitor having a first... |
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8957794 |
A/D converter and method for calibrating the same
An ADC includes sampling means for sampling an input voltage signal, comparator(s) for receiving the sampled signal, and a DAC including circuitry for generating a search signal approximating the... |
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8957795 |
Analog-to-digital conversion device
An analog-to-digital conversion device includes: an analog-to-digital converter that receives an analog voltage and converts the analog voltage into a digital value to output the converted digital... |
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8957804 |
Successive approximation A/D converter
The successive approximation A/D converter includes: switch groups 105—1 to 105—x each of which is connected to the other end of each corresponding capacitor of capacitors 106—1 to 106—x to... |
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8952835 |
Background calibration of aperture center errors in analog to digital converters
A method of background calibration of aperture center errors in a data communication system is provided. In an implementation, in response to detection of a low sampler output (“0”) in between two... |
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8952836 |
Pipeline analog-to-digital converter
A pipeline analog-to-digital converter is disclosed which includes at least one periodic unit consisting of two adjacent stages that jointly use two capacitor networks of the same structure. Each... |
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8947284 |
AD converter and AD conversion method
An A/D converter includes a plurality of AD converting sections that sequentially operate at predetermined intervals. The AD converting section has an ADC that converts an analog signal into a... |
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8947281 |
Apparatus and methods for actively terminated digital-to-analog conversion
Apparatus and methods for digital-to-analog conversion are disclosed. In one embodiment, an electronic system includes a bias circuit and a digital-to-analog converter (DAC) including an input... |
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8947276 |
System and methodology for analog-to-digital converter linearity testing
A method for testing an analog-to-digital converter is disclosed. In an implementation, the method may include providing input data to analog-to-digital converter circuitry. The analog-to-digital... |
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8947280 |
Analogue-to-digital converter
An integrated-circuit, continuous-time, sigma-delta analog-to-digital converter has a single-ended analog input, a converter reference input, and a ground connection. The converter has a... |
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8947288 |
Analog-digital converter
A differential analog-digital converter is provided. The converter comprises a decision unit for evaluating a potential difference between two input signal lines, a number of charging units for... |
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8947290 |
Successive approximation AD converter
A higher-order DAC and a lower-order DAC each have a plurality of capacitive elements having capacitance values weighted with a binary ratio and are configured so that a first terminal of each of... |
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8947285 |
ADC with noise-shaping SAR
Representative implementations of devices and techniques provide analog to digital conversion of analog inputs. A multistage comparator using a feed-forward technique can provide noise shaping of... |
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8947275 |
Method and apparatus for calibrating digital background through capacitor division and swapping for reducing capacitor mismatch effect of analog-to-digital converter
A high-quality Analog to Digital Converter (ADC) is used to calibrate a difference attributable to a capacitor mismatch in a Digital to Analog Converter (DAC). The present invention is... |
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8947286 |
Analog/digital converter
An analog/digital converter includes: a first analog/digital conversion unit that performs digital conversion on received first analog input voltage in a first time period; a second analog/digital... |
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8941518 |
Methods and apparatus for calibrating pipeline analog-to-digital converters having multiple channels
Methods and apparatus are provided for calibrating stages in pipeline analog-to-digital converters (ADCs) having multiple channels. |
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RE45343 |
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... |