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| Number | Title | Issue Date |
| 8106806 | AD converter Disclosed herein is an AD converter, including, a reference voltage generator, a plurality of amplifiers, a plurality of averaging resistance elements, and a plurality of first averaging auxiliary circuits each including a first amplifier and a first resistance elem... | 01/31/2012 |
| 8040268 | Data readout system having non-uniform ADC resolution and method thereof A data readout system with non-uniform resolution has a pick up head for reading data stored in an optical disc and generating an analog signal, a reference voltage unit for producing a plurality of reference voltage levels, wherein voltage differences between two a... | 10/18/2011 |
| 8035543 | Analog-to-digital conversion circuit An analog-to-digital conversion circuit includes a plurality of comparators and an averaging circuit. The averaging circuit is configured so that a length of a metal routing connected between output terminals of two comparators arranged on a leftmost side from among... | 10/11/2011 |
| 8013773 | Rail to rail flash An analog lo digital converter comprising: a first set comprising nodes defined by circuitry such that each node is at a respective voltage, the voltages on the nodes being in an orderly progression between the voltage of a first current source and the voltage of a ... | 09/06/2011 |
| 7999717 | Folding circuit and analog-to-digital converter A folding circuit and an analog-to-digital converter wherein a response to small signals is improved, a load on a clock signal can be reduced, and the increase of circuit area can be prevented. The circuit includes a reference voltage generating circuit that generat... | 08/16/2011 |
| 7973692 | Systems and methods for synchronous, retimed analog to digital conversion Various embodiments of the present invention provide systems and methods for analog to digital conversion. For example, a latch based analog to digital converter is disclosed that includes a first interleave with a set of comparators, a selector circuit and a latch.... | 07/05/2011 |
| 7898450 | Analog signal processing device An analog signal processing device including a voltage selector selecting a given comparison reference voltage from plural comparison reference voltages, an arithmetic unit arithmetically processing the given comparison reference voltage and an analog input signal, ... | 03/01/2011 |
| 7898451 | Analog-to-digital converter, optical disk reproduction device, and receiver device A plurality of comparators (CMP1, CMP2, . . . ) respectively correspond to a plurality of reference voltages (V1, V2, . . . ), and each compares a reference voltage corresponding to the comparator with a signal level of an analog signal (... | 03/01/2011 |
| 7889110 | Analog/digital converter and information recording and reproducing apparatus The present invention provides an A/D converter includes: a plurality of comparators for comparing a plurality of respective standard voltages with an analog input value for a magnitude thereof, the comparators being arranged depending on magnitudes of the standard ... | 02/15/2011 |
| 7859446 | AD converter and AD conversion method An exemplary object of the present invention is to achieve both of high-speed operation by parallel processing and a simple configuration by sequential comparison processing, so as to realize high accuracy of AD conversion processing. An AD converter according to th... | 12/28/2010 |
| 7796078 | Enhanced time-interleaved A/D conversion using compression Compression of signal samples output from a parallel, time-interleaved analog to digital converter (TIADC) for a baseband signal, includes calculating first or higher order differences of consecutive signal samples followed by lossless or lossy encoding of the diffe... | 09/14/2010 |
| 7768437 | Systems and methods for reducing the effects of ADC mismatch Various embodiments of the present invention provide systems and methods for utilizing a plurality of potentially mismatched analog to digital converters. For example, a method for adaptively processing a variety of input signals is disclosed. The method includes pr... | 08/03/2010 |
| 7760125 | A/D conversion circuit for use with low-potential and high-potential power supplies An A/D conversion circuit including a plurality of resistor elements connected in series between a low-potential power supply and a high-potential power supply. The A/D conversion circuit includes a plurality of comparators that compare a reference voltage divided b... | 07/20/2010 |
| 7760127 | Flash ADC An analog to digital converter (ADC) includes a resistance ladder including N resistances arranged in series. Connection nodes are arranged between adjacent ones of the N resistances and at each end of the resistance ladder. An input signal is received at a selected... | 07/20/2010 |
| 7760126 | Flash converter differential reference ladder auto-zero circuit A differential reference ladder with an auto zero circuit that can be used as part of a flash analog to digital converter. The auto zero operation is performed relative to a common mode voltage of the ladder. The resistive ladder is disconnected from the rest of the... | 07/20/2010 |
| 7724173 | Time-interleaved analog-to-digital-converter A method for operating a time-interleaved analog-to-digital converter for converting an analog input to a digital output using a time-interleaved analog-to-digital converter, wherein the time-interleaved analog-to-digital converter comprises an array of M sub ADCs (... | 05/25/2010 |
| 7714761 | Voltage error correction system A voltage error correction system includes a voltage converter, a first and a second analog to digital converters, a subtracter, an adder, and a digital voltage generator. The voltage converter adjusts an input voltage proportionally, adds the adjusted input voltage... | 05/11/2010 |
| 7701376 | Digital calibration type analog-to-digital converter and wireless receiver circuit and wireless transceiver circuit using the same In a wireless chip receiving the multi-rate data according to the related art, power consumption and a circuit area of an analog-to-digital converter become large. In a digital calibration type analog-to-digital converter including both a reference analog-to-digital... | 04/20/2010 |
| 7696915 | Analog-to-digital converter having reduced number of activated comparators An ADC circuit includes multiple comparators and a controller coupled to the comparators. Each of the comparators is operative to generate an output indicative of a difference between a first signal representative of an input signal applied to the ADC circuit and a ... | 04/13/2010 |
| 7696916 | Parallel type analog-to-digital conversion circuit, sampling circuit and comparison amplification circuit A parallel type analog-to-digital conversion circuit, including a reference signal generating portion and a comparison amplification portion, the comparison amplification portion including a plurality of amplifiers, input resetting switches, first sampling capacitor... | 04/13/2010 |
| 7675451 | Serial-parallel type analog-to-digital converter and analog-to-digital conversion method A serial-parallel type analog-to-digital converter includes a reference voltage generator, a higher bit comparing portion and a lower bit comparing portion, and a reference voltage selecting portion, wherein the lower bit comparing portion includes the plurality of ... | 03/09/2010 |
| 7656339 | Systems and methods for analog to digital conversion Various embodiments of the present invention provide systems and methods for analog to digital conversion. For example, an analog to digital converter is disclosed that includes an analog input that is provided to a comparator bank. The comparator bank receives a re... | 02/02/2010 |
| 7649486 | Flash A/D converter A flash A/D converter includes a reference voltage generator for generating a plurality of reference voltages, a first group of amplifiers having a plurality of amplifiers each of which amplifies a difference voltage between each reference voltage generated by the r... | 01/19/2010 |
| 7642944 | A/D converter A full-flash A/D converter, including a differential amplifier circuit row and a voltage comparison circuit row, has an adjusting circuit 107 for making the output dynamic range of differential amplifier circuits accurately fall within the input dynamic range... | 01/05/2010 |
| 7605740 | Flash analog-to-digital converter A flash analog-to-digital converter comprises a resistive string powered by a reference voltage source for providing a set of equidistant reference voltages and a set of comparators for comparing the analog input signal with the reference voltages. A set of switches... | 10/20/2009 |
| 7605739 | Differential flash ADC with dual resistance ladder legs receiving amplified inputs A differential analog to digital converter (ADC) comprises a first resistance ladder leg including two resistances having first ends that communicate with a middle node. A second resistance ladder leg includes two resistances having first ends that communicate with ... | 10/20/2009 |
| 7561093 | Analog-to-digital (AD) converter using resonance frequency shifting and voltage detecting device thereof An analog-to-digital (AD) converter and a voltage detecting device thereof are provided. The AD converter includes at least one voltage detecting device which outputs a signal of a frequency determined based on a magnitude of an input voltage using a resonance frequ... | 07/14/2009 |
| 7554477 | Amplifier array circuits and flash analog to digital converters An amplifier array circuit is provided. An amplifier array includes a main amplifier array comprising a plurality of first amplifiers and a plurality of reference voltages, wherein the first amplifier is coupled to an input signal and the reference voltage correspon... | 06/30/2009 |
| 7528758 | Flash-type analog to digital conversion circuit for comparing an analog input voltage with a plurality of reference voltages A plurality of reference voltages are generated by a reference voltage generation circuit. A plurality of comparators is supplied respectively with an analog input voltage and any two reference voltages out of the plurality of reference voltages. A threshold voltage... | 05/05/2009 |
| 7515085 | Electronic network circuit with dissymmetrical differential pairs The invention relates to integrated circuits comprising a set of identical differential pairs of two transistors each (T1, T2; T3, T4) one receiving a variable voltage (Vinp, Vinn) at its base and the other receiving a fixed reference vol... | 04/07/2009 |
| 7477178 | Power-optimized analog-to-digital converter (ADC) input circuit A power-optimized analog-to-digital converter (ADC) input circuit provides for optimized power consumption versus performance. The first amplifier stage of the ADC is provided by a plurality of amplifiers that are selectably enabled to provide a particular bandwidth... | 01/13/2009 |
| 7420498 | Signal converter performing a role A system with signal converter devices, in particular, ADCs (analog-to-digital converters), a device for use in a signal converter system, and a method for operating a signal converter system is disclosed. In one embodiment, a system with a plurality of signal conve... | 09/02/2008 |
| 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 reference voltage output circuit. In a correction mode where the offsets... | 09/02/2008 |
| 7405688 | Analogue-to-digital converter and method for converting an analogue input signal into a digital information An analogue-to-digital converter comprises a window comparator. The window comparator comprises an input for an analogue input signal and an output for a comparison result indicating a result of a comparison of the analogue input signal with an upper bound and a low... | 07/29/2008 |
| 7405691 | Analog-to-digital conversion circuit Disclosed herein is an analog-to-digital conversion circuit configured to convert an input analog signal into a digital signal, said analog-to-digital conversion circuit includes: a first amplifying unit; a second amplifying unit; a comparing unit; a first averaging... | 07/29/2008 |
| 7403149 | Folding and interpolating analog-to-digital converter and method of converting analog signal to digital signal A folding and interpolating analog,-to-digital converter (ADC) includes a preamp unit, a first folding stage, a second folding stage, a comparison unit and an encoder. The preamp unit receives an analog input signal and reference voltages to generate reference signa... | 07/22/2008 |
| 7403150 | Analog-to-digital converter architecture using a capacitor array structure An analog-to-digital converter architecture is described. An analog-to-digital converter circuit includes a switched capacitor circuit structure to receive an input voltage signal and one or more reference voltage signals. The analog-to-digital converter circuit als... | 07/22/2008 |
| 7394421 | Fast analogue-to-digital converter The invention relates to fast analogue-to-digital converters having differential inputs and a parallel structure, comprising at least one network of N series resistors with value r and one network of N comparators. The series resistor network receives a reference vo... | 07/01/2008 |
| 7394420 | High-speed analog/digital converter An analog-to-digital converter comprising a positive input terminal, a negative input terminal, several difference detection means detecting a voltage difference between a positive input port and a negative input port, first resistors connecting each positive input ... | 07/01/2008 |
| 7391352 | Comparison circuit for analog/digital converter The invention pertains to a comparison circuit for an analog/digital converter. In order to reduce the effect of the offset voltages of the various comparators of the comparison circuit, voltage followers and a resistor network delivering at its outputs, mean voltag... | 06/24/2008 |
