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7427936 A/D converter device and electronic control apparatus including same  
The A/D converter device includes a comparing section and an abnormality judging section. The comparing section compares a voltage of its signal transfer line connected between its input...
7425911 Signal-to-noise ratio when using fewer bits than the number of output bits of an analog to digital converter  
Improving signal-to-noise ratio (SNR) when using fewer bits than the number of output bits of an ADC as digital representation of the strength of the samples of an input signal. In an embodiment,...
7420499 Analog-to-digital converter and threshold-value correcting method  
An analog-to-digital converter includes a track-and-hold circuit, a constant-voltage source, a threshold voltage selection circuit, a first comparator to a seventh comparator, an encoder, and a...
7417574 Efficient amplifier sharing in a multi-stage analog to digital converter  
An analog to digital converter (ADC) containing an operational amplifier having a first pair of input terminals and a second pair of input terminals, wherein the output varies if the input signals...
7414564 Enhanced-accuracy converter stages for pipelined signal converter systems  
Converter systems are provided which complement sample capacitors in at least one converter stage with replica capacitors. The replica capacitors are switched to receive replica charges from the...
7414559 Dynamic bias circuit  
A bias circuit includes a digital to analog converter (D 2 A) generating an output representing a voltage level for tuning an analog signal. The D 2 A is coupled to a primary register frame that is...
7414558 Digital to analog conversion using summation of multiple DACs  
A method for converting a digital signal to an analog signal, said method including a plurality of signal sources, preferably current sources, one or more of said signal sources being variable...
7414557 Method and apparatus for feedback signal generation in sigma-delta analog-to-digital converters  
A method and apparatus taught herein provide a digital-to-analog converter (DAC) for use in a conversion feedback path of a sigma-delta type analog-to-digital converter (ADC). The DAC uses current...
7414553 Microcontroller having in-situ autocalibrated integrating analog-to-digital converter (IADC)  
A microcontroller has an integrating analog-to-digital converter (IADC) with an in-situ autocalibrating functionality. On-chip autocalibrating circuitry supplies a first predetermined analog input...
7414552 Analog front end circuit for converting analog signal outputted by image sensor into digital signal  
An analog front end circuit comprises a variable gain amplifier circuit (VGA circuit), a first sample switch, a second sample switch, a hold switch and an analog to digital converter device. The...
7414550 Methods and systems for sample rate conversion and sample clock synchronization  
The architecture for a combined universal sample rate converter and a sample clock synchronizer is presented. The universal sample rate converter can be applied, for example, to audio samples...
7411531 Methods and apparatus for asynchronous sampling of a received signal at a downsampled rate  
Methods and apparatus are provided for decimated interpolated clock/data recovery (ICDR) to perform asynchronous sampling of a received signal. A received signal is converted to a plurality of...
7408489 Method and system for mixed analog-digital automatic gain control  
Aspects of the invention provide a method and system for a mixed analog-digital automatic gain control. The received analog signal is amplified by the analog amplifier and then converted to a...
7405686 Methods and apparatus for implementing and/or using amplifiers and/or for performing various amplification related operations  
Methods and apparatus for implementing and/or using amplifiers and performing various amplification related operations are described. The methods are well suited for use with, but not limited to,...
7405685 Negative contributive offset compensation in a transmit buffer utilizing inverse clocking  
A novel method and apparatus for a negative contributive offset compensation mechanism for a transmit buffer adapted to compensate for the positive offset generated by higher order sigma-delta...
7405681 A/D converter calibration test sequence insertion  
An A/D converter stage including an A/D sub-converter connected to a D/A sub-converter ( 12 ) is calibrated by a method that inserts a calibration test sequence into the D/A sub-converter. This is...
7405680 Distortion compensator  
A distortion compensator updating and selecting a distortion compensation coefficient applied to a digital transmission signal so as to reduce the difference between the digital transmission signal...
7400280 Analog to digital converter calibration via synchronous demodulation  
A technique for dynamically calibrating a successive approximation charge to digital converter by toggling at least some portion of the converter between two predetermined states, with the design...
7400279 Circuits and methods with comparators allowing for offset reduction and decision operations  
Circuits and methods may be improved by using ADCs that compensate for the effect of comparator input offset on comparator decisions. Offset compensation may be implemented in an ADC by using an...
7394414 Error reduction in a digital-to-analog (DAC) converter  
In a method to improve error reduction in a digital-to-analog converter (DAC), comprising a mapping matrix block and a plurality of selectable source units which supply signals that in combination...
7394413 Reduced complexity nonlinear filters for analog-to-digital converter linearization  
A method of converting an input analog signal to a compensated digital signal comprises converting the input analog signal to an uncompensated digital signal, inputting the uncompensated digital...
7391348 Reducing noise associated with local reference-potential fluctuations in mixed-signal integrated circuits  
An integrated circuit (IC) adapted to (i) measure a voltage differential between a ground potential external to the IC and a ground potential internal to the IC and (ii) based on the measurement...
7385547 Minimized differential SAR-type column-wide ADC for CMOS image sensors  
An analog-to-digital converter comprising a minimal amount of circuitry for conversion of an input analog signal to a series of digital bits. A differential comparator is provided for generating...
7385546 Digitizer module, a waveform generating module, a converting method, a waveform generating method and a recording medium for recording a program thereof  
A digitizer module comprises an AD converter for sampling a pair of analog signals at a predetermined time interval and converting into a first and second digital signals respectively, a second...
7385542 Digitizer module, a waveform generating module, a converting method, a waveform generating method and a recording medium for recording a program thereof  
A digitizer module comprises an AD converter for sampling a pair of analog signals at a predetermined time interval and converting into a first and second digital signals respectively, a second...
7382306 AD converter and display unit  
An AD converter includes: a reference voltage generator circuit having a plurality of resistors connected in series with predetermined reference voltage applied to both ends thereof, the reference...
7382304 Sampling and measurement of periodic signals  
A periodic signal is sampled. The sampling frequency is less than the Nyquist rate of the periodic signal. A period of the periodic signal is determined. A phase of the periodic signal is tracked...
7382303 Non-perturbing power supply margin controller  
A power supply margin controller may alter the voltage of a control signal used to control the output voltage of a power supply. The controller may include a digital-to-analog converter having an...
7382298 Code-correction structures and methods for digital displays  
Analog-to-digital converters (ADCs) generally make code errors as they convert analog display signals to digital display signals of digital displays. Code-correction structures are provided that...
7382297 Transmitter I/Q mismatch calibration for low IF design systems  
A calibration module includes a first input that receives a reference signal, a second input that receives a crosstalk signal, and first and second absolute value modules that generate first and...
7382296 System for mixed analog-digital automatic gain control  
Aspects of the invention provide a system for a mixed analog-digital automatic gain control. The received analog signal is amplified by the analog amplifier and then converted to a digital value by...
7379007 A/D converter, A/D converter apparatus, and sampling clock skew control method  
A parallel A/D converter includes a plurality of comparators for comparing an input signal in parallel, an input signal line for distributing the input signal to the plurality of comparators, and a...
7379004 Driving circuit and method for increasing effective bits of source drivers  
An LCD driving circuit and method for increasing effective bit(s) of the source driver is disclosed. A reference voltage generator generates a group of compensated reference voltage levels that are...
7378998 Correction of static mismatch errors in a D/A converter  
Methods, articles of manufacture and systems for the correction of static mismatch errors in D/A converters, where an input word, being the digital representation of an analog input signal, is...
7378997 Method of reducing inter-symbol interference, a sigma-delta converter for performing this method and a storage medium conveying information generated by this method  
A method and arrangement of reducing inter-symbol interference occurring at the digital to analog conversion of a one bit digital signal is provided. During the generation of the one-bit digital...
7375671 Systems and methods for reducing transient errors on digital to analog converters (DACs) deglitcher  
A digital to analog converter that receives a digital signal and that converts the digital signal to an analog input signal is provided. The converter may include a group of most significant bits....
7372385 A/D converter, signal processor, and receiving device  
An A/D converter which converts an analog current signal into a digital signal, includes: a filter removing a noise component from the analog current signal to output an analog voltage signal; a...
7365662 DC-offset correction circuit for a communication system and method of correcting a DC-offset in a communication system  
A DC-offset correction circuit includes an analog circuit to generate a plurality of analog offset-correction signal values, each of which are assigned to a hop band. The analog circuit is coupled...
7362254 Systems and methods for minimizing delay in a control path  
Systems and methods for minimizing delay in a feedback path. In one embodiment, an analog-to-digital feedback path includes an analog-to-digital converter (ADC) configured to receive and digitize...
7362247 Digital correction of nonlinearity errors of multibit delta-sigma digital to analog converters  
Digital correction of multibit ADAC nonlinearities for error feedback DACs is provided. The integral nonlinearity (INL) error of the multibit ADAC is estimated (on line or off line) by a...
7362246 High speed comparator offset correction  
An offset canceling buffer receives a reference voltage, and provides a modified reference voltage to a comparator. The modified reference voltage operates to cancel any comparator offset. The...
7358877 Obsolescence mitigation for electron bombarded semiconductor tubes in programmable waveform digitizers  
Method for replacing Electron Bombarded Semiconductor (EBS) tubes in a waveform digitizer having an analog input interface and a digital output interface, the EBS tubes being interposed between the...
7358876 Mixed-mode analog offset cancellation for data conversion systems  
A circuit includes a chopper switch to receive an analog input signal and output a first chopped signal of a first polarity during a first clock phase and a second chopped signal of a second...
7356424 Diagnostic compiler for pipeline analog-to-digital converter, method of compiling and test system employing the same  
The present invention is directed to a diagnostic compiler for use with a pipeline analog-to-digital converter (ADC) having code sequences corresponding to stages thereof. In one embodiment, the...
7355537 Built-in self-test apparatus and method for digital-to-analog converter  
A built-in self-test apparatus for a digital-to-analog converter uses a differentiation unit for differentiating a digital-to-analog (DA) signal to obtain the differences between pulses of the...
7352308 DC offset correction device and method  
It is an object of the present invention to provide a DC offset correction means capable of correctly performing DC offset correction even when transmitting a non-modulation signal in radio...
7352307 Comparator chain offset reduction  
Comparator chain total offset, static and dynamic, is reduced by injecting a compensation quantity in at least one point in the chain of comparator components. The compensation quantity is...
7352306 Analog-to-digital converter with non-linearity compensation  
Systems and techniques for converting an analog input value to an output digital code are described. A system includes a first internal analog-to-digital converter (ADC) configured to receive the...
7348910 Reference module apparatus and method therefor  
A Root Mean Square (RMS) detector circuit includes a first differential pair circuit arranged to operate in a common mode. The detector circuit also includes a compensation circuit unit having a...
7345609 Current steering d/a converter with reduced dynamic non-linearities  
A digital to analog converter including a first current source ( 3 ) to which a first digital signal ( 28,31 ) is applied for conversion to an analog signal, wherein the first digital signal has a...
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