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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 7728753 | Continuous synchronization for multiple ADCs A system, apparatus and method for continuous synchronization of multiple ADC circuits is described. The ADC circuits can be arranged in a master-slave configuration within the system so that the converter clock is subdivided into slower speeds for the data output c... | 06/01/2010 |
| 7671777 | AD converter An AD converter includes an analog data storing unit, a first DA converter for converting an input digital data into a first analog reference voltage which varies within a first voltage range in a range of every possible signal voltage of the input analog data, a se... | 03/02/2010 |
| 7551116 | Semiconductor integrated circuit performing a voltage comparison and preventing deterioration of a voltage comparison accuracy A semiconductor integrated circuit includes a differential amplifier circuit receiving first and second input voltages, a latch circuit comparing a voltage received from a first output terminal of the differential amplifier circuit through a first capacitor and a vo... | 06/23/2009 |
| 7466259 | Methods and apparatus to measure a voltage on an integrated circuit Methods and apparatus to measure a voltage on an integrated circuit are disclosed. An example method to measure a voltage on an integrated circuit provides a reference signal to a first input of an encoder, provides a signal having a first voltage to a second input ... | 12/16/2008 |
| 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 voltage to the IADC and obtains a first data value from the IADC. The... | 08/19/2008 |
| 7366244 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 04/29/2008 |
| 7324037 | Analog to digital converter with interference rejection capability An analog to digital converter (ADC) with interference rejection capability and method thereof are disclosed. The ADC includes a threshold generator, a comparator circuit, a counter and an integrator. By comparing a signal with positive and negative threshold signal... | 01/29/2008 |
| 7221303 | Delta sigma modulator analog-to-digital converters with multiple threshold comparisons during a delta sigma modulator output cycle The analog-to-digital (ADC) delta sigma modulators in the signal processing systems described utilize comparator number reduction techniques to improve a delta sigma modulator quantizer. The delta sigma modulator generates one quantization output signal per delta si... | 05/22/2007 |
| 7193551 | Reference voltage generator for use in display applications A multi-reference voltage generator includes an interface controller, a first bank of N m-bit registers and a second bank of N m-bit registers. A first multiplexer has inputs connected to outputs of the first and second bank of registers. An m-bit digital-to-analog ... | 03/20/2007 |
| 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 |
| 7167845 | Process for performing fuzzy procedures in processing devices, corresponding processing device and computer program product A method and related system for performing fuzzy procedures in processing devices. The method provides for calculating a degree of activation of a fuzzy proposition represented by input values having a fuzzy set associated to a triangular or trapezoidal membership f... | 01/23/2007 |
| 7158062 | Clocked DAC current switch A switch having a first arrangement for providing a first set of first and second complementary intermediate signals; a second arrangement for providing a second set of third and fourth complementary intermediate signals; a third arrangement responsive to the first ... | 01/02/2007 |
| 7149275 | Integrated circuit and method of implementing a counter in an integrated circuit An integrated circuit, such as a programmable logic device, implements a single bit transition counter in logic. The counter preferably comprises a first stage receiving a clock signal having a first clock rate and generating a least significant bit in a count. A pl... | 12/12/2006 |
| 7123676 | Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of ... | 10/17/2006 |
| 7119730 | Analog-to-digital converter for programmable logic Digital-to-analog and analog-to-digital conversion are implemented in or using programmable logic. The DAC and ADC circuits may be hardwired in a programmable logic integrated circuit or may be implemented using an intellectual property (IP) core. The IP core would ... | 10/10/2006 |
| 7116262 | System and method to receive data A system and method of receiving data is disclosed. The system includes an analog to digital converter, registers to store a plurality of digital samples provided by the analog to digital converter, and a state machine coupled to the registers. The state machine det... | 10/03/2006 |
| 7102389 | Voltage translator with data buffer A voltage translator with data buffer includes an input inverter receiving a data input signal at a first voltage level. A level shifting cross-coupled NOR circuit is coupled to the input inverter for translating the data input signal at a second voltage level. An o... | 09/05/2006 |
| 7098835 | Analog/digital conversion method and analog/digital conversion circuit Paying attention to the difference between a subsequently inputted analog signal and a reference signal which is an analog signal converted to the digital signal immediately before for instance, changing timing dynamically for converting the analog signal to the dig... | 08/29/2006 |
| 7062401 | Low circuit overhead built in self test for oversampled ADC's Circuitry and a method for testing oversampled Analog to Digital converters. The voltage reference is used as the input signal, thus eliminating the need for a special signal generator. The dynamic signal is obtained by not sampling the voltage reference on every sa... | 06/13/2006 |
| 7050388 | Method and system for crosstalk cancellation Signals propagating in one communication channel can generate crosstalk interference in another communication channel. A crosstalk cancellation device can process the signals causing the crosstalk interference and generate a crosstalk cancellation signal that can co... | 05/23/2006 |
| 7039464 | Voltage independent measurement apparatus, system, and method A cardiac rhythm management apparatus may include a monitored energy source, a reference energy source, and a measurement module. The monitored source provides an initial pacing amplitude voltage and a pacing droop voltage, while the reference source provides a subs... | 05/02/2006 |
| 7038609 | Successive approximation analog-to-digital converter with pre-loaded SAR registers A SAR converter having enhanced performance by virtue of effectively pre-loading the SAR's most significant bits with a value that makes the associated DAC output almost equal to the signal to be converted. A normal SAR conversion is then completed with the SAR bits... | 05/02/2006 |
| 7034724 | Training circuit and method of digital-analog converter and analog-digital converter A training method of a digital-analog converter is provided. The digital-analog converter comprises a plurality of parallel capacitors, each of which is floatingly coupled to a plurality of correcting capacitors. Two voltages outputted from the digital-analog conver... | 04/25/2006 |
| 7015853 | Data converter with reduced differential nonlinearity Methods and apparatus are provided for reducing nonlinearities in an analog-to-digital signal converter. An analog pseudo-random noise sample is added to an analog input sample and the combined sample is converted into a digital representation. A pseudo-random digit... | 03/21/2006 |
| 7009546 | Control unit having a signal converter A control unit for a transportation device has a processing unit that is supplied with power by a first supply voltage and has a signal converter for converting input analog signals to digital signals. The signal converter has an analog converter stage for generatin... | 03/07/2006 |
| 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 |
| 6972701 | A/D converter calibration A D/A converter range calibration system in an A/D converter structure including a set of comparators with associated calibrating D/A converters includes means (RCC) for determining the offset error range for the entire set of comparators and means (R-DAC) for adjus... | 12/06/2005 |
| 6972702 | 1-Of-N A/D converter A flash analog-to-digital converter (ADC). Each comparator of the flash ADC has an OFF-ON-OFF transfer function. For each analog value to be converted, only one comparator is in the ON condition, and the other comparators are in the OFF condition. In this way, the a... | 12/06/2005 |
| 6961015 | Touch screen display circuit and voltage measurement circuit A touch screen display circuit is disclosed which includes means for measuring a voltage at two separate input terminals which represent a location on a touch screen where pressure was applied. The display circuit includes means for defining a time period during whi... | 11/01/2005 |
| 6958724 | Method and circuit for conforming an analog actual signal to a digital desired signal A method of controlling an analog actual signal to conform to a digital desired signal uses a comparator with two input ports and one output port and a digital-to-analog converter. The analog actual signal to be converted is fed to one input port of the comparator a... | 10/25/2005 |
| 6906657 | Successive approximation analog-to-digital converter with sample and hold element According to some embodiments, a successive approximation analog-to-digital converter is provided. ... | 06/14/2005 |
| 6809675 | Redundant analog to digital state machine employed to multiple states on a single line A state machine is used to remove residual electric charge from a sense line and to sample the voltage of the sense line at multiple pre-determined times to determine the presence of a terminating capacitor and its value. Various values of capacitors identify discre... | 10/26/2004 |
| 6734816 | D/A converter with high jitter resistance A D/A converter including a plurality of potential generating sections. They each receive a 1-bit signal from one of an input terminal and delay circuit, and a clock signal or inverted clock signal from an input section or inverter for inverting the clock signal. Wh... | 05/11/2004 |
| 6727839 | High speed, low power comparator A method for reducing bit errors in an analog to digital converter having an array of comparators. The outputs of first and second comparators are received as in inputs to an Exclusive OR gate. The first and second comparators are separated in the array by a third c... | 04/27/2004 |
| 6670904 | Double-ramp ADC for CMOS sensors A double ramp ADC within an image sensor. The double ramp ADC divides the analog-to-digital conversion process into two steps. During the first step of the conversion, the ADC runs through the potential digital values roughly, using coarse counter steps, ... | 12/30/2003 |
| 6597303 | Comparator with very fast regeneration time constant A comparator comprises a cross-coupled regenerative latch, a circuit connected to the cross-coupled regenerative latch and a clocking circuit. The cross-coupled regenerative latch regenerates, during a latching mode, a signal which is indicative of a diff... | 07/22/2003 |
| 6542106 | Comparator programmable for high-speed or low-power operation A comparator is used as a microcontroller peripheral and is programmable for either high-speed or low-power operation. High-speed operation requires higher operating current than the operating current required in the low-power mode, but enables much faste... | 04/01/2003 |
| 6490109 | Data storage device There is provided a data storage device concurrently allowing storage of data that can be reproduced in higher quality and storage of data that can be used also in a data transmission path with a lower transfer speed. The data storage device comprises an ... | 12/03/2002 |
| 6380881 | Successive approximation A/D converter capable of error correction A successive approximation A/D converter includes a comparator formed of a plurality of comparators and comparing an analog input voltage with a plurality of voltages output from a digital-to-analog converter so as to output a conversion result including ... | 04/30/2002 |
| 6369738 | Time domain/frequency domain data converter with data ready feature A time domain data converter with output frequency domain conversion. A data conversion circuit is operable to receive a signal in the time domain and provide an output in the frequency domain. It includes a data converter for converting data from an anal... | 04/09/2002 |
