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| Number | Title | Issue Date |
| 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 plurality of sample and hold (S/H) circuits. Each of the S/H circuits... | 05/29/2012 |
| 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 selecting one of a plurality of gamma voltages to generate output data ... | 05/22/2012 |
| 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 source system adds the post-stage driving unit into the analog back end... | 05/22/2012 |
| 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 digital-to-analog converter is provided to generate bias signaling associated wit... | 05/22/2012 |
| 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 divider network. Each summing block includes at least three ports having an... | 05/22/2012 |
| 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 image device. An encoding processor converts the digital video data sig... | 05/08/2012 |
| 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 switch (DCMS). The circuit further includes a direct current (DC) off... | 05/01/2012 |
| 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 determination, based on the buffered portions of the digital signal, of when... | 04/24/2012 |
| 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 corresponding one of the digital to analog converters. ... | 04/24/2012 |
| 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 for every conversion step a direction. A decimal difference... | 04/17/2012 |
| 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 switching network having a plurality of switches operably coupled to the pl... | 04/03/2012 |
| 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 feedback loop configured to generate a control signal responsive to a stream ... | 03/27/2012 |
| 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 accumulator to a sine wave amplitude using a hybrid DAC, including a no... | 03/20/2012 |
| 8111183 | Systems and methods for digital upconversion for digital signals Systems and methods for digital upconversion of digital signals are provided. In one embodiment, the system includes a digital frequency adjustment system and a digital to analog conversion system. In a feature of the embodiment, the digital frequency adjustment sys... | 02/07/2012 |
| 8111181 | Single-ended polar transmitting circuit with current salvaging and substantially constant bandwidth An embodiment of the invention provides a single-ended polar transmitting circuit. The single-ended polar transmitting circuit comprises a DAC, a differential-to-single-ended converter, a GmC filter and a load. The GmC filter comprises two gain stages, two filters, ... | 02/07/2012 |
| 8111182 | Digital to analog converter comprising mixer In some embodiments, digital to analog converters are provided which comprise a plurality of cells. Each cell comprises a mixer and coupling circuitry to selectively couple a local oscillator signal to said mixer. ... | 02/07/2012 |
| 8094053 | Signal generating apparatus and test apparatus Provided is a signal generating apparatus comprising a DA converter that outputs an output signal corresponding to input data supplied thereto; a sample/hold unit that is provided between the DA converter and an output end of the signal generating apparatus, and tha... | 01/10/2012 |
| 8094054 | Transmitter with delay mismatch compensation A transmitter device comprises a digital part and an analog part. The digital part comprises a digital modulator for receiving bits and for digitally modulating the received bits. The transmitter device includes first and second digital-to-analog converters. The tra... | 01/10/2012 |
| 8094052 | Circuit and method for dynamically selecting circuit elements Techniques for dynamically selecting circuit elements to combat mismatches are described. In one design, an apparatus includes first, second, and third circuits. The first circuit receives input data and provides first signals that are asserted based on the input da... | 01/10/2012 |
| 8089383 | Programmable digital-to-analog converter A multi-mode digital-to-analog converter (DAC) configured to operate in a plurality of modes. ... | 01/03/2012 |
| 8089385 | D/A conversion circuit and semiconductor device A D/A conversion circuit in accordance with the present invention, which is provided with a switch swD, allows a writing operation of a voltage (a true gradation voltage) to be performed at a higher speed by first applying a first voltage (a voltage close to the tru... | 01/03/2012 |
| 8089384 | Programmable digital-to-analog converter A multi-mode digital-to-analog converter (DAC) configured to operate in a plurality of modes. ... | 01/03/2012 |
| 8085177 | Digital to analog converter system and method with multi-level scrambling Tri-level scrambling in a digital to analog converter system is achieved by, in response to a tri-level binary code input, disabling a negative data directed scrambler circuit when the input code is in the positive cycle portion, disabling a positive data directed s... | 12/27/2011 |
| 8081099 | D/A converter, differential switch, semiconductor integrated circuit, video apparatus, and communication apparatus In a D/A converter that has a plurality of current sources (IS1, IS2 and IS3-1 to IS3-63) each including a transistor, and is for converting an input digital signal into an analog signal by selecting paths of currents output... | 12/20/2011 |
| 8077067 | Method and apparatus for simulating a potentiometer A contactless sensor utilizes analog and digital circuitry to provide direct interchangeability with a simple potentiometric sensor, matching all of the electrical properties of a potentiometer, including supply voltage range, power supply current, output voltage ra... | 12/13/2011 |
| 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 digital-to-analog converter provides a control signal to a plurality of single-st... | 11/22/2011 |
| 8035542 | Digital-to-analog converter and successive approximation type analog-to-digital converter including the same A digital-to-analog converter generates a voltage from power supply and ground voltages, generates upper and lower limit reference voltages for a reference width which regards the generated voltage as an intermediate potential, converts a change in an analog input s... | 10/11/2011 |
| 8031097 | Multiplying digital-to-analog converter for high speed and low supply voltage A multiplying digital-to-analog converter includes an operational amplifier (OP-amp) operated under a first power supply voltage and a second power supply voltage; an OP-amp input switch block coupled to a common mode voltage for selectively coupling the common mode... | 10/04/2011 |
| 8022851 | DAC with data independent common mode dynamics A current-steered DAC has first and second differential outputs for providing an analog output signal under control of a digital input signal. In operational use of the DAC, the output signal has a differential component, which is representative of the digital input... | 09/20/2011 |
| 8022850 | Multiple-bit, digital-to-analog converters and conversion methods Embodiments include DACs and methods for digital-to-analog conversion. A DAC includes an encoder and a plurality of DAC elements. The encoder maps each of a plurality of bits of a digital input value to one of the DAC elements, and produces a sign indication indicat... | 09/20/2011 |
| 8013768 | Integrated upstream amplifier for cable modems and cable set-top boxes An upstream amplifier is integrated on a substrate with a digital-to-analog converter (DAC) to form an integrated circuit. In an embodiment, a low-pass filter is also integrated on the substrate. The output signal level of the upstream amplifier is controllable. In ... | 09/06/2011 |
| 8013770 | Decoder architecture with sub-thermometer codes for DACs A digital-to-analog converter (DAC) for converting a digital signal to an analog signal includes a first thermometer decoder and a second thermometer decoder. The first thermometer decoder is configured to decode most-significant bits (MSBs) of the digital signal to... | 09/06/2011 |
| 8013769 | Digital-to-analog converter and method of digital-to-analog conversion In one embodiment, the DAC includes an analog gray voltage generation unit configured to generate a plurality of analog gray voltages, and a first decoder configured to select two different voltages of the plurality of the gray voltages as a first level voltage and ... | 09/06/2011 |
| 8013771 | Method and apparatus for bandpass digital-to-analog conversion The disclosed embodiments provide method and apparatus for digital to analog conversion of a signal that may be limited to a bandpass frequency. In an exemplary embodiment, a bandpass DAC is disclosed which includes a plurality of gates. Each gate receives a carrier... | 09/06/2011 |
| 8009073 | Method and apparatus for generating an analog signal having a pre-determined pattern A circuit configured to generate an analog signal having a pre-determined pattern. The circuit includes a plurality of digital-to-analog converters. Each of the plurality of digital-to-analog converters includes a plurality of current sources configured to generate ... | 08/30/2011 |
| 8004438 | Circuit and method for dynamically selecting circuit elements Techniques for dynamically selecting circuit elements to combat mismatches are described. In one design, an apparatus includes first, second, and third circuits. The first circuit receives input data and provides first signals that are asserted based on the input da... | 08/23/2011 |
| 8004439 | Digital to analog converter A digital to analog converter with two outputs controlled by an input signal with n-bits is disclosed. A reference voltage circuit generates (2n+1) reference voltages numbered from 1 to (2n+1). A switch array coupled to the reference voltage ci... | 08/23/2011 |
| 8004440 | Transimpedance amplifier and analog-digital converter circuit A transimpedance amplifier according to an exemplary aspect of the present invention includes a first terminal supplied with a first power supply voltage, and a second terminal supplied with a second power supply voltage having a potential lower than that of the fir... | 08/23/2011 |
| 8004441 | Small-area digital to analog converter based on master-slave configuration A digital-to-analog (DAC) converter that includes a plurality of dynamically operated slave digital-to-analog (DAC) converters, each having a switched current mirror and a storage capacitor, and a static master digital-to-analog (DAC) converter in communication with... | 08/23/2011 |
| 7999712 | Digital-to-analog converters and methods thereof A digital-to-analog converter for converting a digital signal into an analog signal is provided. The digital-to-analog converter includes a preprocessing unit, a gain controller, a modulator and an output unit. The preprocessing unit receives and oversamples the dig... | 08/16/2011 |
