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7227479 |
Digital background calibration for time-interlaced analog-to-digital converters
The present invention provides for background calibration of a time-interleaved analog-to-digital converter (TIADC). In one embodiment, a background calibrator includes a TIADC having a parallel...
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7224306 |
Analog-to-digital converter in which settling time of amplifier circuit is reduced
A first amplifier circuit samples an input analog signal and holds the sampled signal for a predetermined period of time. A first analog-to-digital converter circuit samples the input analog signal...
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7224298 |
ADC background calibration timing
A background calibrating, skip and fill, analog/digital converter (ADC) generates an output data sequence having successive data elements representing magnitudes of successive samples of an analog...
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7221298 |
Calibration circuitry
Circuitry includes a multiplexer to output first data and second data in response to a clock signal, the clock signal having rising and falling clock edges, where the multiplexer outputs first data...
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7221302 |
Delta-sigma modulator coefficient calibration method and apparatus
A delta-sigma modulator coefficient calibration method and apparatus provides for adjustment of the modulator coefficients, and thus the modulator noise transfer function (NTF), in operational...
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7221297 |
D/A converter and output amplifying circuit
A D/A converter in which distortion caused by PWM is favorably removed even if a sampling frequency is low relative to a signal frequency is provided. The D/A converter includes a...
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7218260 |
Column analog-to-digital converter of a CMOS image sensor for preventing a sun black effect
A column analog-to-digital (ADC) circuit for preventing a sun black effect in a CMOS image sensor (CIS) is provided. The ADC circuit includes: a comparator having a signal voltage input port and a...
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7218259 |
Analog-to-digital converter with signal-to-noise ratio enhancement
A method of operating a digital to analog converter comprising the steps of operating the converter in a first mode to obtain a first conversion result, operating the converter in a correction mode...
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7215266 |
Hybrid DC offset cancellation scheme for wireless receiver
Systems and methods for canceling static and dynamic DC offsets by combining a digital DC offset correction scheme with an analog DC offset correction scheme. A feedback-based digital DC offset...
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7212138 |
Delay-based analog-to-digital converter
An analog-to-digital converter generates and adjusts a digital signal based on a delay caused by an analog signal. The analog signal controls a delay of a first delay chain, and the digital signal...
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7209062 |
Apparatus and method for gain adjustment for analog YPbPr signals
An apparatus and a method for gain adjustment for analog YPbPr signals are provided. The apparatus comprises a first clamping circuit, an analog-to-digital converter (ADC), and a gain calculator....
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7209060 |
Reducing variation in reference voltage when the load varies dynamically
Providing a substantially constant reference voltage to a component from a reference buffer connected by a path. The load that would be offered to the reference buffer in desired durations is...
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7202805 |
Amplifier gain calibration system and method
A gain calibration system for an amplifier includes an amplifier having inputs and outputs and an analog to digital converter having inputs and an output. There is a voltage supply for providing a...
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7199746 |
Method for search and matching of capacitors for a digital to analog converter of an SAR analog to digital converter
The method is described for selecting capacitors from a capacitor array for each bit of a SAR ADC. The process involves selecting a group of capacitors from the capacitor array and determining a...
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7196526 |
Matched delay line voltage converter
A method and apparatus for measuring or converting voltage, the method comprising: applying an input voltage to a primary delay line; applying a reference voltage to a timer delay line; propagating...
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7196645 |
Method and compensation device for compensation of characteristic errors of an analog-digital converter
To compensate for errors during the conversion of an analog input signal into a digital output signal in an analog-to-digital converter (ADC), an error of the digital output signal is corrected...
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7193553 |
Analog to digital converter with power-saving adjustable resolution
A pipelined analog to digital converter (ADC) that is arranged to dynamically adapt its resolution and sampling frequency based on at least one of a determined mode of communication, communication...
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7193546 |
Phase-measuring delta-sigma modulator calibration method and apparatus
A phase-measuring delta-sigma modulator calibration method and apparatus provides for adjustment of the modulator noise transfer function (NTF) of the modulator in operational environments. A...
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7187310 |
Circuit calibration using voltage injection
Efficient calibration of circuits is performed using injection imprecise voltage by using different voltages in a subtractive manner to be able to calibrate with respect to a voltage that is out of...
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7183953 |
Calibrating automatic test equipment containing interleaved analog-to-digital converters
Automatic test equipment (ATE) includes interleaved analog-to-digital (A2D) converters to produce digital signals, where the digital signals are used to produce an output signal, the output signal...
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7180436 |
Apparatus and method for auto calibration of display device
An apparatus for auto calibration of a display device, the apparatus including a signal generating unit for generating predetermined digital patterns, converting the digital patterns into R, G, B...
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7177610 |
Calibrated low-noise current and voltage references and associated methods
A low-noise current reference circuitry includes a voltage source, a current source, and a controller. The voltage source generates a reference voltage. The current source provides a low-noise...
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7176816 |
Circuit configuration for analog/digital conversion
A circuit configuration for converting analog signals to digital signals, having a multiplexer which has a plurality of analog signal inputs, an address input that is several bits wide and an...
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7176822 |
Analogue-to-digital converter
An analogue-to-digital converter includes a summing element for combining an analogue input signal of the analogue-to-digital converter with a feedback signal in order to generate a fault signal, a...
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7173552 |
High accuracy segmented DAC
A N-bit segmented digital to analog converter (DAC) adapted to provide an analog signal output on the basis of a digital input code, the DAC being formed from a plurality of individual segments,...
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7170439 |
Self-calibration circuit for capacitance mismatch
A self-calibration circuit for capacitance mismatch is provided. The circuit comprises a sample-and-hold (S/H) circuit, a comparator, and a switch control circuit. The S/H circuit comprises a...
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7170433 |
Analog I/O board providing analog-to-digital conversion and having a two-level buffer that allows demand based access to converted data
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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7167117 |
Test circuit for digital to analog converter in liquid crystal display driver
A test device for testing a digital to analog converter includes a gamma reference unit for generating a plurality of analog signals different from each other; a temporary storing unit for...
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7164375 |
Analog to digital converter using both analog and digital offset voltages as feedback
An A/D conversion unit includes an A/D converter, an analog offset canceller connected to the input end of the A/D converter, and a digital offset canceller connected to the output end of the A/D...
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7161412 |
Analog calibration of a current source array at low supply voltages
A calibration circuit for a current source cell includes a reference current source and a transresistance amplifier forming a feedback loop for calibrating the output current of the current source...
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7161514 |
Calibration method for interleaving an A/D converter
A method and low cost apparatus to accurately determine the gain, offset, and/or skew calibration values of each A/D converter in a few steps for an interleaving A/D converter. The calibration...
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7161523 |
Systems and methods for a self-organizing analog-to-digital converter
An apparatus uses a “self-organizing” method to eliminate or at least partially compensate for undesired or unexpected threshold errors encountered in analog-to-digital conversions. The...
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7161515 |
Calibration system and method for a linearity corrector using filter products
A calibration system for calibrating a linearity corrector using the sum of filter products is proved, along with a method of calibrating the linearity corrector. The calibration system includes a...
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7154421 |
DNL/INL trim techniques for comparator based analog to digital converters
A trimmable comparator. The novel comparator includes a first circuit for comparing first and second input signals and in accordance therewith generating first and second output signals, and a...
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7154422 |
Scheme and method for testing Analog-to-Digital converters
The invention provides a test scheme of analog-to-digital converters and method thereof. It comprises: a control circuit, a step-ramp signal generator, a multiplexer, an n+m-bit counter, and a test...
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7152010 |
Calibrating an analog-to-digital converter using a test signal with a precise DC voltage
A self-calibrating sigma-delta converter (SCADC) functions in a calibration mode and in an operational mode. In the calibration mode, a test circuit of the SCADC generates test signals that are...
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7148828 |
System and method for timing calibration of time-interleaved data converters
A method for calibrating time interleaved samplers comprising applying a calibration signal to a time-interleaved sampling device, wherein the signal is coherent with at least one sample clock on...
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7148832 |
Analog digital converter having a function of dynamic adjustment corresponding to the state of the system
A DSP calculates time integration of the light amount received by a CCD, using an input image. Determination is made regarding whether or not the light amount is equal to or smaller than a...
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7148827 |
Offset compensating apparatus and method of digital/analog converter
An offset compensating apparatus and method of a digital/analog converter that are capable of preventing an offset of a driving unit by switching an offset generated from an LCD panel driving unit...
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7145489 |
Tester for a semiconductor device
A tester including a first module for testing a digital-to-analog conversion and a second module for testing an analog-to-digital conversion. The tester may include a controller for controlling...
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7146283 |
Calibrating analog-to-digital systems using a precision reference and a pulse-width modulation circuit to reduce local and large signal nonlinearities
A calibration unit and technique for calibrating A/D systems (e.g., data acquisition devices) using a pulse-width modulation (PWM) circuit to reduce nonlinearity. The calibration unit may be...
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7145492 |
Data management method
A data management method that by encrypting and distributing digital content prevents copyright infringement, and that prevents authorization information for decrypting the encrypted digital...
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7142138 |
Multi-step analog/digital converter and on-line calibration method thereof
The present invention discloses an on-line calibration method, which utilizes two calibration algorithms running in the background without interrupting the normal operation of the analog signal...
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7133148 |
Digital camera for image device calibration
The invention is directed to an apparatus for calibrating an output of an image output device, comprising an image input device configured to image an output of the image output device; and a test...
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7129881 |
Pipeline analog to digital converter
The pipeline analog-to-digital converter has a number of subsequent comparator stages ( 2 ) where the thresholds of the comparator stages are adjusted in accordance with the digital conversion...
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7129874 |
Method and apparatus for operating a pipelined ADC circuit
An analog-to-digital converter (ADC) circuit that converts an analog input signal into a digital output circuit includes a noise shaping first stage cascaded with a pipelined second stage. The...
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7129867 |
Apparatus and method for correcting DC offset of receiver in multiband-hopping communication system
A DC offset correction apparatus and method of a receiver in a multiband-hopping communication system is provided. The DC offset correction apparatus of the receiver in the communication system...
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7129875 |
Tracking reference system for analog-to-digital converter systems
An analog-to-digital (A/D) converter system is provided that compensates for operating variations associated with one or more passive components of the A/D converter. In one aspect of the present...
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7126510 |
Circuit calibration system and method
An integrated circuit device includes one or more calibration paths including one or more devices. A signal generator is coupled to at least one calibration path and configured to provide the...
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7119724 |
Analog digital converter and program therefor
There is provided an analog-to-digital conversion apparatus that converts analog signals into digital signals. The analog-to-digital conversion apparatus includes: a plurality of analog-to-digital...
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