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8223049 Charge injection mechanism for analog-to-digital converters  
A low-cost charge injection mechanism may enable oversampling to be used on low frequency signals by injecting dither noise into the ADC input. The dither noise can reduce the quantization noise...
8223048 Method and apparatus for self-testing a digital-to-analog converter (DAC) in an integrated circuit  
An on-chip self testing digital-to-analog converter (DAC) is provided. The functionality of the DAC is measured using a combination of integral non-linearity (INL) and differential non-linearity...
8223056 Cyclic digital to analog converter  
Some embodiments include apparatus and methods having an amplifier, a capacitor network coupled to the amplifier, and switching circuitry coupled to the amplifier and the capacitor network. The...
8223054 Digital-analog converter  
In order to reduce a current mismatch by laying-out the bias circuit of current cells adjacent to each other in a common current centroid manner or connecting the output lines of the current cells...
8223045 D/A converter and electron beam exposure apparatus  
A D/A converter includes a D/A converter base part having a first D/A converter unit performing D/A conversion of high order bits and a second D/A converter unit performing D/A conversion of low...
8223055 Reduced-switching dynamic element matching apparatus and methods  
Apparatus and methods disclosed herein operate to reducing switching artifacts associated with dynamic element matching by sorting a set of unit elements to establish a priority order of selection...
8217817 Current switch circuit and D/A converter, semiconductor integrated circuit, and communication device using the same  
[Means for Solving the Problem] In a current switch circuit A used for a current steering D/A converter, a current switch basic circuit 1 includes first and second transistors Tr121 and Tr122...
8217819 Multiplying DAC and a method thereof  
The present invention is directed to a multiplying digital-to-analog converter (MDAC) and its method. First ends of capacitors are electrically coupled to an inverting input node of an amplifier,...
8217818 Digital RF converter and RF converting method thereof  
Provided are a digital radio frequency (RF) converter and an RF converting method thereof. The RF frequency converter includes first and second RF output terminals of a differential form...
8212702 Delta-sigma analog-to-digital conversion apparatus and method thereof  
A delta-sigma analog-to-digital conversion apparatus for receiving an analog input signal to generate a digital output signal includes a subtracting unit, a quantizer, and a feedback unit. The...
8212701 Integrated circuit and corresponding method of processing a multitype radio frequency digital signal  
An integrated circuit includes input circuitry for receiving a radio frequency digital signal, output circuitry capable of delivering a radio frequency analog signal, and a processing stage...
8212703 Systems including a programmable segmented DAC and methods for use therewith  
A segmented digital-to-analog converter (DAC) includes a plurality of sub-DACs, each of which is adapted to receive a separate reference current that specifies a transfer function of the sub-DAC....
8203471 System including feedback circuit with digital chopping circuit  
A system including a first circuit, a second circuit, and a feedback circuit. The first circuit is configured to provide input signals. The second circuit is configured to receive the input...
8198917 Current segmentation circuit for optimizing output waveform for high speed data transmission interface  
The present invention provides a current segmentation circuit for optimizing output waveform from high speed data transmission interface, which comprises a four current sources controlled by four...
8200031 Multisampling with reduced bit samples  
A relatively non-complex signal processor supporting an active pixel sensor imaging system is disclosed. The signal processor only requires the first sample from a group of samples in a multiple...
8193960 Output apparatus and test apparatus  
Provided is an output apparatus comprising a plurality of current sources; a plurality of holding sections that correspond respectively to the current sources and that each hold a designated...
8188899 Un-buffered segmented R-DAC with switch current reduction  
An resistor string digital-to-analog converter (DAC) that includes elements to compensate for resistor ladder loading, and/or to provide compensation for loading such as via switch current...
8188898 Integrated circuits, liquid crystal display (LCD) drivers, and systems  
An integrated circuit includes a digital-to-analog converter (DAC) circuit including at least one first channel type DAC and at least one second channel type DAC. The integrated circuit includes a...
8184030 Source driver not including any P-type digital-to-analog converter  
A source driver includes at least a channel, and the channel includes an N-type digital-to-analog converter (NDAC) and an operational amplifier. The NDAC is utilized for receiving input data and...
8184031 High-order wide band modulators and multiplying digital-to-analog converters using distributed weighting networks  
A distributed weighting network that employs a summing line including distributed summing blocks disposed thereon. Each summing block includes a plurality of resistors that define a resistor...
8184028 Video data source system  
A video data source system includes a video encoder and an analog back end device. The analog back end device includes a digital to analog converter and a post-stage driving unit. The video data...
8184029 Phase interpolator  
A phase interpolator is described. The phase interpolator can have a code-to-bias converter, and a phase interpolation interface. In an embodiment of a code-to-bias converter, a single...
8179477 AV player chip, AV system, and related method utilizing a multiplexer for sharing digital-to-analog converters  
An AV player chip includes a TV encoder, a timing controller, a multiplexer and a plurality of digital-to-analog converters. The TV encoder is used for transforming a first image signal into a TV...
8179389 Compact layout structure for decoder with pre-decoding and source driving circuit using the same  
Provided is a decoder for receiving a digital data and outputting an analog voltage. The decoder comprising a main switch array, a first pre-decoding switch array, and a second pre-decoding switch...
8179295 Self-calibrated current source and DAC using the same and operation method thereof  
A background self-calibrated DAC is presented. A virtual-short theory, applicable to input/output terminals of an operational amplifier, is periodically employed so as to self-calibrate a current...
8174415 Broadcast AM receiver, FM receiver and/or FM transmitter with integrated stereo audio codec, headphone drivers and/or speaker drivers  
An apparatus includes processor and a control interface. The processor is adapted to in a first mode of operation, operate as part of one of a wireless receiver and a wireless transmitter and in a...
8174475 D/A conversion circuit, data driver, integrated circuit device, and electronic instrument  
A D/A conversion circuit includes a first D/A converter and a second D/A converter that respectively output a first voltage and a second voltage. An ith two-input selector among a plurality of...
8174543 Display device driving circuit of which power consumption is reduced, control method thereof, and display device using the same  
A display device driving circuit includes: a grayscale signal output circuit, grayscale signal lines, a grayscale voltage output circuit, grayscale voltage lines, a digital-analog conversion...
8174420 Video encoding apparatus and method having output restriction function  
A video encoding apparatus receives a digital video data signal, converts the digital video data signal into an analog video signal and outputs the analog video signal to an externally connected...
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...
8169353 Wideband digital to analog converter with built-in load attenuator  
A circuit for digital-to-analog conversion is described. The circuit includes a digital-to-analog converter (DAC). The DAC includes a double cascaded current source and a differential current-mode...
8165549 Method for notch filtering a digital signal, and corresponding electronic device  
An electronic device, includes sigma-delta modulation circuit to operate with a clock signal and having output circuitry to deliver a digital data signal. First circuitry delivers a radiofrequency...
8164502 Data look ahead to reduce power consumption  
Portions of a digital signal are buffered prior to being provided to a sub-system (e.g., a segmented DAC of a LDD) that is responsive to the digital signal. While being buffered, there is a...
8164499 Shared-array multiple-output digital-to-analog converter  
In an exemplary decision-feedback equalizer (DFE) of a serializer/deserializer (SerDes) receiver, a single current mirror array is shared by multiple current digital-to-analog converter (IDAC)...
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...
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...
8164318 Digital control switching power supply unit  
A digital control switching power supply unit converts an input voltage into a desired output voltage using a digitally controlled pulse width modulation (PWM) signal according to a switching...
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...
8154433 Linearity correction circuit for voltage mode DAC  
A force/sense voltage-mode DAC coupled with multiple transconductance amplifiers that generate a correction current injected to a node in one of the DAC cells is discussed. The correction current...
8154431 Data generator providing large amounts of data of arbitrary word length  
A waveform memory 66 stores data streams with each data stream having M-bit parallel data. A sequence memory 60 stores sequence information and data discard information on the amount of data to...
8149151 Second order dynamic element rotation scheme  
A sensor system for generating sample analog signals for processing by a signal processing circuit that utilizes non-constant weights includes a plurality of signal generating elements and a...
8149152 Capacitor based digital to analog converter layout design for high speed analog to digital converter  
A method and system for capacitor based digital to analog converter design layout for high speed analog to digital converter are provided. The method includes arranging a plurality of metal plates...
8144043 Shaping inter-symbol-interference in sigma delta converter  
A signal converting system is described that has a multi-segment digital to analog converter coupled to one or more error shaping loops. Each error shaping loop includes a quantizer with a...
8144045 Timing signal generator circuit for use in signal waveform measurement system for measuring multi-channel on-chip signals flowing on VLSI  
A timing signal generator circuit includes a DA converter converting an input digital value into an analog voltage, and a VT converter converting the analog voltage into a corresponding delay...
8144046 Linearity enhancement circuit, ΣΔ A/D converter, and reception apparatus  
A linearity enhancement circuit is disclosed which includes: a first shift amount creation block creating a first shift amount in keeping with the immediately preceding output code of an n-bit A/D...
8144042 Combinatorial circuit with shorter delay when inputs arrive sequentially and delta sigma modulator using the combinatorial circuit  
A combinatorial circuit with pre-calculation and having shorter delay is described. The combinatorial circuit uses information available from earlier input signals to pre-calculate intermediate...
8138957 Direct digital frequency synthesizer using hybrid digital to analog converter and synthesizing method thereof  
A direct digital frequency synthesizer and a synthesizing method thereof. The direct digital frequency synthesizer uses a hybrid digital to analog converter, which matches output data of a phase...
8134486 DAC calibration  
Mechanisms to calibrate a digital to analog converter (DAC) of an SDM (sigma delta modulator) are disclosed. An extra DAC element in addition to the DAC is used to function in place of a DAC...
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)...
8125365 Method for generating an analog signal generated by PWM signal, and system generating such signal  
A generation method of an analogue signal generated by a PWM signal whose cyclic ratio and period are parametrizable is discussed. It is thus possible choose the pair formed from the cyclic ratio...