Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7518538 | Adaptive entropy coding compression with multi-level context escapes The performance (compression ratio) of an entropy coding compressor can be improved by separating its output into two streams: encoded output symbols compressed according to a probability model, and literal symbols that were not present in the probability model when... | 04/14/2009 |
| 7477173 | Combined AD/DA converting apparatus A combined AD/DA converting apparatus includes an input signal selection circuit configured to select one analog signal out of a plurality of analog input signals based on an input selection signal; an input sample hold circuit configured to sample and hold the anal... | 01/13/2009 |
| 7369074 | D/A converter for a digital signal after non-linear A/D conversion, audio signal processing circuit and liquid crystal display device including the same A D/A converter inputted with non-linear conversion digital data such as a digital signal encoded according to a μ-Law system or the like as it is to convert into an analog signal. A D/A converter is of resistor string type, in which a resistance value of each of r... | 05/06/2008 |
| 7277420 | Temporal alignment of codec data with wireless local area network RF slots A wireless local area network (WLAN) transceiving integrated circuit services voice communications in a WLAN with at least one other WLAN device. The WLAN transceiving integrated circuit includes a WLAN interface, an input buffer, a transcoder, and a processor. The ... | 10/02/2007 |
| 7256725 | Resistor ladder interpolation for subranging ADC An analog to digital converter includes a resistive ladder outputting a plurality of reference voltages and a coarse ADC receiving the reference voltages and a voltage input. A plurality of coarse comparators receive an output of the coarse ADC. A switch matrix rece... | 08/14/2007 |
| 7254172 | Filter control for varying data rate communication channels Processing circuitry includes an analog filter and filter control circuitry and processes an analog signal having a varying data rate. The analog filter filters the analog signal based on a transfer characteristic to transfer a filtered signal. The filter control ci... | 08/07/2007 |
| 7250884 | Analog-to-digital converters for control loop applications An analog-to-digital converter error detector suitable for single-chip control loop applications employs a single comparator determining the difference between an initial input voltage and a reference voltage in one or more conversion iterations, with the difference... | 07/31/2007 |
| 7188196 | Method and apparatus for playing analog audio to multiple codec outputs Method and apparatus for playing analog audio in an electronic audio system having multiple audio codecs, only one of which has a direct hardware connection to the analog audio source. First analog audio data is received from the analog audio source at a first audio... | 03/06/2007 |
| 7173549 | Semiconductor integrated circuit in which voltage down converter output can be observed as digital value and voltage down converter output voltage is adjustable An output voltage of a VDC circuit is subjected to A/D conversion with an on-chip A/D converter. Accordingly, an output voltage VDCout of the VDC circuit can be observed as a digital value, which facilitates measurement. Reduction in the number of terminals leads to... | 02/06/2007 |
| 7164377 | Multiplexed voltage reference strategy for codec A shared voltage reference circuit for a codec is shown that includes a voltage reference circuit for producing a reference voltage. A first sample and hold circuit has a first capacitor coupled to an output of the voltage reference circuit through a first switch co... | 01/16/2007 |
| 7138932 | Signal converting apparatus for integrating analog-to-digital converter and digital-to-analog converter and integration unit A signal converting apparatus for integrating an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC) and an integration unit thereof are provided. The present invention integrates ADC and DAC, that do not operate simultaneously, into a signal c... | 11/21/2006 |
| 7129876 | Digital-analog converter A digital-analog converter includes a counter (13) for performing counting operation according to clocks (CK1, CK2), a comparator (12) for comparing the count value to a digital input value and outputting the clocks (CK1, CK2 | 10/31/2006 |
| 7095895 | Semiconductor integrated circuit for realizing coding circuit Provided is a circuit for implementing the coding of a DVI (Digital Visual Interface) standard in a small size of hardware, at high speed, and with low power consumption. In a DVI coding circuit, the input of a number-of-levels comparison circuit 22 for judgi... | 08/22/2006 |
| 7088272 | Pipeline arithmetic code decoding method and apparatus using context index predictor An arithmetic code decoding apparatus including a context index predictor which predicts a context index, a pipeline arithmetic code decoder which executes a decoding process of the bitstream using the predicted context index and outputs a decoded symbol based on pr... | 08/08/2006 |
| 7088281 | Coarse channel calibration for folding ADC architectures A circuit for calibrating a coarse channel circuit in a folding analog-to-digital converter circuit. A reference value is input to the coarse channel circuit and an output of the coarse channel circuit is sensed. A parameter of the coarse channel circuit is adjusted... | 08/08/2006 |
| 7002391 | Selectable input attenuation Mobile terminal design is made simpler by providing an attenuation circuit having a selectable amount of attenuation within an integrated circuit. In one embodiment, a plurality of input pins are provided so as to connect to different points of the attenuation circu... | 02/21/2006 |
| 7002499 | Clocked D/A converter A digital-to-analog converter is disclosed, comprising an input/output circuit, a bistable circuit connected with the input/output circuit, a clock circuit connected with the input/output circuit and the bistable circuit, and a current generator circuit connected wi... | 02/21/2006 |
| 6909935 | Methods with resolution enhancement feature for improving accuracy of conversion of required chemical mechanical polishing pressure to force to be applied by polishing head to wafer CMP methods in which a polishing pad is moved relative to a wafer and a retainer ring implement instructions for applying required pressure to the wafer for CMP operations. Accuracy of computations of the pressures, and of conversion of the pressure to force, is imp... | 06/21/2005 |
| 6910060 | Spatio-temporal filter and method A system, apparatus and methods are disclosed for the spatial and temporal processing of time dependant array data using analog signal processors. In one embodiment, a programmable array of switched capacitors is used to provide tunable parameters for controlling th... | 06/21/2005 |
| 6725120 | Apparatus and methods with resolution enhancement feature for improving accuracy of conversion of required chemical mechanical polishing pressure to force to be applied by polishing head to wafer CMP systems and methods in which a polishing pad is moved relative to a wafer and a retainer ring implement instructions for applying required pressure to the wafer for CMP operations. Accuracy of computations of the pressures, and of conversion of the pressure to f... | 04/20/2004 |
| 6583745 | A/D converter An A/D converter has a successive approximation register having a plurality of A/D registers each corresponding to one of A/D inputs. A capacitor in a comparator is charged by a voltage determined based on a value held in an A/D register corresponding to ... | 06/24/2003 |
| 6577987 | Operational monitoring for a converter Monitoring a converter (1) includes detecting whether a value of an input variable (2) for the converter (1) assumes a first prescribed input reference value (41) and checking whether an output variable (3) from the converter (1) likewise assumes a corres... | 06/10/2003 |
| 6498577 | Piecewise-linear, non-uniform ADC A non-uniform analog-to-digital converter (ADC) produces digital output data representing the magnitude of an analog input signal having a non-uniform magnitude probability distribution. The digital output data represents the analog input signal with rela... | 12/24/2002 |
| 6448914 | Integrated circuit for conditioning and conversion of bi-directional discrete and analog signals An integrated circuit chip for interfacing a digital computer to sensors and controlled devices can be configured to accept and provide a variety of analog and discrete input and output signals. The circuit includes a plurality of signal conditioning cell... | 09/10/2002 |
| 6407691 | Providing power, clock, and control signals as a single combined signal across an isolation barrier in an ADC The present invention provides an isolated analog-to-digital converter system including an analog-to-digital subsystem including an analog-to-digital converter for converting an analog signal to a digital control stream. A microcontroller subsystem provid... | 06/18/2002 |
| 6373412 | Fast JPEG huffman encoding and decoding Huffman encoding, particularly from a packed data format, is simplified by using two different table formats depending on code length. Huffman tables are also reduced in size thereby. Decoding is performed in reduced time by testing for the length of vali... | 04/16/2002 |
| 6347123 | Low-current sample rate converter A low power sample rate converter adapted for use with a telecommunications system transceiver. The sample rate converter includes a first circuit that provides an input signal characterized by a first sample rate and a delayed version of the input signal... | 02/12/2002 |
| 6260085 | Changeover device which uses both analog and digital signals as input signals and supplies an analog output signal The invention relates to a changeover device which uses both analog and digital signals as input signals and supplies an analog output signal. The changeover device contains a digital-to-analog converter whose output level is adjustable. Matching to the l... | 07/10/2001 |
| 6211802 | Semiconductor integrated circuit for performing data transfer A semiconductor integrated circuit for performing data transfer integrated circuit includes a first circuit, a second circuit, and first and second data converters. The first circuit outputs data of a plurality of bits. The second circuit receives the dat... | 04/03/2001 |
| 5995033 | Signal conditioning circuit including a combined ADC/DAC, sensor system, and method therefor An electronically calibrated sensor (100) includes a sensing element (102) with an output coupled to a signal conditioning circuit (104). The signal conditioning circuit (104) is adapted to be highly computationally efficient and operable for compensating... | 11/30/1999 |
| 5929796 | Self-calibrating reversible pipeline analog to digital and digital to analog converter A self-calibrating reversible pipeline analog to digital converting architecture configured to convert an input analog signal to an output digital signal and further to convert an input digital signal to an output analog signal is disclosed. The reversibl... | 07/27/1999 |
| 5896100 | Method and apparatus for analog-to-digital or digital-to-analog conversion An analog-to-digital converter circuit is disclosed that is capable of converting both positive and negative analog input signals, and that is capable of operating as either an analog-to-digital converter or a digital-to-analog converter. The converter in... | 04/20/1999 |
| 5594438 | Analog-to-digital converter An analog-to-digital converter circuit is disclosed that is capable of converting both positive and negative analog input signals, and that is capable of operating as either an analog-to-digital converter or a digital-to-analog converter. The converter in... | 01/14/1997 |
| 5493300 | Circuit configuration for a D/A and A/D converter Using only one R2R network, driven by a digital logic, it is possible to implement both a D/A and A/D converter, An existing stabilized voltage Vcc is used instead of a separate reference voltage source. The D/A and A/D converter is calibrated ... | 02/20/1996 |
| 5432513 | Codec In a codec having a coding section A/D converting an analog signal into a digital signal, and a decoding section D/A converting a received digital signal into an analog signal, a decoding timing generating circuit (50) is provided to generate a D/A conver... | 07/11/1995 |
| 5404141 | Signal converting apparatus utilizing an analog-digital converting section and a digital-analog converting section There is provided a signal converting apparatus using a semiflash type A/D converter comprising an analog-digital (A/D) converting section and a digital-analog (D/A) converting section, wherein the apparatus has an input switching circuit for switching in... | 04/04/1995 |
| 5389925 | A/D and D/A conversion device with shared parameter generators The inventive A/D and D/A conversion device replaces the conventional parameter generators, which are provided in pairs for supplying same filter parameters to the decimation and interpolation digital filters respectively, with a single parameter generato... | 02/14/1995 |
| 5373292 | Integration type D-A/A-D Conversion apparatus capable of shortening conversion processing time An integrating D-A/A-D converter includes a reference value generation circuit for generating at least one reference value relating to voltage or current, a control circuit for carrying out switching between a digital or analog input and the reference val... | 12/13/1994 |
| 5345234 | Method and apparatus for combining a flash analog to digital converter with digital to analog functions A converter circuit provides analog to digital and digital to analog functions on a single silicon device. A flash analog to digital converter produces digital outputs using comparators which each receive an input signal and which each have different refe... | 09/06/1994 |
| 5317529 | Digital filter using intermediate holding registers and common accumulators and multipliers An A/D-D/A converting apparatus, in which a multiplier is omitted by storing the multiplied result of a filter coefficient and a digital signal in advance and reading it out responsive to the inputted digital signal, in view of the point that filter chara... | 05/31/1994 |
