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| Number | Title | Issue Date |
| 8164504 | Successive approximation register analog-digital converter and method for operating the same A successive approximation resistor analog digital converter (SAR ADC) includes a first conversion unit including a correction capacitor array and a bit capacitor array 2V-1 less than the number of a bit, a second conversion unit configured to differentia... | 04/24/2012 |
| 8130133 | A/D converter using isolation switches In an A/D converter, isolation switches are used between the capacitors and the conversion switches. The conversion switches are those switches used to selectively couple the plates of the binary weighted capacitors to either Vref or 0 volts during the A/D conversio... | 03/06/2012 |
| 8106809 | Sigma-delta converters and methods for analog-to-digital conversion A switched capacitor sigma-delta modulator or another analog-to-digital converter (ADC) uses chopper stabilization. Chopping clock transitions are performed during non-active periods of the sampling clock phases, reducing disturbance of the circuit caused by choppin... | 01/31/2012 |
| 8098182 | Cable gateway using a charge-domain pipeline analog to digital converter A cable gateway, such as compatible with version 3.0 of the Data Over Cable Service Interface Specifications and other audiovisual standards, that uses an analog front end having a charge-domain analog-to-digital converter that uses a charge-domain pipeline of at le... | 01/17/2012 |
| 8077070 | Charge-domain pipelined charge-redistribution analog-to-digital converter A charge-domain pipeline of at least two stages is provided. Each stage comprises a charge-storage node, a charge-transfer circuit for conveying charge from said charge-storage node out of said stage, a charge-control capacitor connected to said charge-storage node ... | 12/13/2011 |
| 8072364 | Avoiding floating diffusion contamination A technique for operating a source follower buffer circuit, such as employed in a charge domain pipeline, to eliminate floating diffusion signal charge contamination from downstream circuits. The method and apparatus places an output of the circuit in a known state ... | 12/06/2011 |
| 8068047 | A-D convert apparatus and control method Provided is an AD conversion apparatus including: a differential amplifier that generates a differential input voltage according to an analog input signal; a differential DA converter of a charge redistribution type, which outputs a differential output voltage resul... | 11/29/2011 |
| 8049654 | Digital trimming of SAR ADCs Successive approximation register (SAR) analog-to-digital converters (ADCs) generally employ capacitive digital-to-analog converters (CDACs) to perform data conversions. In these CDACs, matching of capacitive values is important, and for conventional high resolution... | 11/01/2011 |
| 8040270 | Low-noise data acquisition system for medical imaging According to embodiments of the present technique, a system and a method for obtaining low-noise measurements for a wide range of analog signal strengths is provided. According to aspects of the present technique, a low-gain measurement of an input pixel charge is p... | 10/18/2011 |
| 8040271 | A/D conversion apparatus, A/D conversion method, and communication apparatus An A/D conversion apparatus includes: a first and a second D/A converter to sample an analog signal and successively compare the analog signal and a reference signal to generate a first and a second comparison signal respectively; a first comparator to compare the f... | 10/18/2011 |
| 8004448 | Dual DAC structure for charge redistributed ADC A system for converting an analog signal to a digital codeword having N bit positions that includes a dual DAC structure having a small DAC and a large DAC. At least one comparator is coupled to the small DAC and large DAC. The small DAC performs bit trials to calcu... | 08/23/2011 |
| 8004449 | Charge redistribution digital-to-analog converter, and successive approximation register analog-to-digital converter having the same A D/A converter includes plus-side and minus-side input terminals; plus-side and minus-side D/A converters each including plural plus-side or minus-side capacitors having capacitance values weighted by the powers of two, a plus-side or minus-side output terminals co... | 08/23/2011 |
| 7994961 | Systems and methods for providing an analog-to-digital converter that uses reduced power and supply voltage Methods and systems are described for providing an analog-to-digital converter that uses reduced power and supply voltage. The analog-to-digital converter includes a sample phase configured to sample an incoming analog signal having an input signal range and compare... | 08/09/2011 |
| 7969343 | Successive approximation analog-digital converter circuit using capacitance array An analog-to-digital converter circuit includes: a capacitor array including a plurality of first capacitors, each having a first terminal connecting to a common node and having a capacitance represented by the nth power of 2 (2n) on the basis of the smal... | 06/28/2011 |
| 7965218 | SAR ADC An electronic device is provided for analog to digital conversion using successive approximation. The device comprises a first ADC stage. The first ADC stage includes a first plurality of capacitors adapted to sample an input voltage, and adapted to be coupled to ei... | 06/21/2011 |
| 7961131 | Charge domain successive approximation analog-to-digital converter An analog to digital conversion circuit and method is presented. The analog to digital circuit (100) comprises a first capacitor (103), arranged for being switchably (102) connected on one side to an input voltage (101), at least one succ... | 06/14/2011 |
| 7961132 | Sampling switch and controller In one embodiment, an A/D converter samples an analog input signal voltage by applying the input signal to a first capacitor terminal, while a second capacitor terminal is connected to ground via an NMOS sampling switch, to charge the capacitor to the input signal v... | 06/14/2011 |
| 7944387 | ADC with low-power sampling An apparatus for analog-to-digital conversion using successive approximation is provided, which is adapted to be supplied with a single ended supply voltage. The device includes: a first analog-to-digital conversion stage including a first set of capacitors coupled ... | 05/17/2011 |
| 7936299 | Capacitive integrate and fold charge-to-digital converter A circuit for converting a charge signal into a binary format of output bits comprises: an integration circuit including an operational transconductance amplifier having an inverting input terminal and an output terminal, an integrating capacitor connected between t... | 05/03/2011 |
| 7924209 | Self-calibration circuit and method for capacitors A self-calibration circuit and method for capacitors are provided. A capacitor array is calibrated to approximate a reference capacitor according to an average parameter generated by calibrating the capacitor array multiple times. Since the capacitance of the compen... | 04/12/2011 |
| 7924208 | Low power 10 Gigabit Ethernet interface A low-power communication interface, such as used with 10 Gigabit Ethernet, that uses an analog front end having a charge-domain analog-to-digital converter that uses a charge-domain pipeline. ... | 04/12/2011 |
| 7920085 | Method and system for analog-to-digital conversion Method and system for analog-to-digital conversion. According to an embodiment, the present invention provides an integrated circuit. The integrated circuit includes a different operational amplifier, which includes a first output, a second output, a first input, an... | 04/05/2011 |
| 7903018 | Analog/digital converter assembly and corresponding method An analogue/digital converter arrangement and a method. A differential input voltage is converted by means of a differentially implemented capacitative voltage divider that comprises two programmable capacitor banks (3, 4), and with the aid of the comparator ... | 03/08/2011 |
| 7898453 | Apparatus and method for successive approximation analog-to-digital conversion A successive approximation analog-to-digital converter (ADC) includes a binary-weighted capacitor array, quantizer, and control block. One end of each capacitor is connected to the input of the quantizer, and a second end of each capacitor is controlled by the contr... | 03/01/2011 |
| 7852254 | 1-bit cell circuit used in a pipelined analog to digital converter The present invention discloses a 1-bit cell circuit used in a pipelined analog to digital converter. The 1-bit cell circuit comprises a reference buffer for providing a reference voltage; a sample and charge transfer circuit for receiving an input signal to generat... | 12/14/2010 |
| 7834796 | Analog-to-digital converter An analog-to-digital converter (ADC) and a battery operated electronic device comprising the ADC. The ADC comprising an input switch; an array of binary-weighted capacitors, the array of capacitors receiving the input voltage signal via the input switch in an on sta... | 11/16/2010 |
| 7834797 | Switched capacitor circuit, switched capacitor filter, and sigma-delta A/D converter A switched capacitor circuit includes a capacitor that performs sampling, a first switch that is provided between the capacitor and an input terminal, and a second switch that is provided between the capacitor and an output terminal. The first switch and the second ... | 11/16/2010 |
| 7834798 | AD converter circuit and optical sensor The A/D converting circuit 20 is provided with a differential amplifying portion 21, a first variable capacitance portion 22A, a second variable capacitance portion 22B, a comparing portion 23, a connection controlling portion 2... | 11/16/2010 |
| 7830295 | A/D converter In an A/D converter, three capacitors are connected to a comparator. The A/D converter also includes three switching circuits that each input a first reference voltage, a second reference voltage, and a third reference voltage in the three capacitors. A control circ... | 11/09/2010 |
| 7812757 | Hybrid analog-to-digital converter (ADC) with binary-weighted-capacitor sampling array and a sub-sampling charge-redistributing array for sub-voltage generation A hybrid Analog-to-Digital Converter (ADC) has a binary-weighted capacitor array and a sub-voltage capacitor array that are coupled together by a coupling capacitor. The sub-voltage capacitor array uses a minimum capacitor size that matches the minimum capacitor siz... | 10/12/2010 |
| 7796079 | Charge redistribution successive approximation analog-to-digital converter and related operating method The analog-to-digital converter provided herein includes a capacitor bank comprising a plurality of binary-weighted capacitors, an operational amplifier having an inverting input node, a noninverting input node coupled to analog ground, and an output node, a reset s... | 09/14/2010 |
| 7782243 | Direct capacitance-to-digital converter A direct capacitance-to-digital converter is provided, including a plurality of switches, an ADC, a reference voltage circuit and a trigger unit. By using trigger unit to control a plurality of switches, and combining the reference voltages outputted by the referenc... | 08/24/2010 |
| 7777663 | Discrete time amplifier circuit and analong-digital converter The present invention is intended to attain simplified circuit configuration and low current consumption in a discrete time amplifier circuit and an AD converter, to improve the convergence from the transient response state to the steady state of the amplifier circu... | 08/17/2010 |
| 7773024 | SAR analog-to-digital converter with large input range A method for analog-to-digital conversion is provided using successive approximation and a plurality of capacitors including a first set of capacitors and a second set of capacitors, a first side of each of the plurality of capacitors being coupled to a common node.... | 08/10/2010 |
| 7768438 | Low power analog to digital converter A sample and integrate circuit includes first and second switching devices. A first terminal of the first switching device communicates with a first input voltage when the first switching device is in the second state. The first terminal of the first switching devic... | 08/03/2010 |
| 7764216 | Analog-to-digital converter, method of controlling the same, and wireless transceiver circuit In an analog-to-digital converter, when a capacitive element with a small capacitance is used in order to reduce power consumption, the characteristics of the analog-to-digital converter deteriorate due to the variation in the specific accuracy. Further, the method ... | 07/27/2010 |
| 7750837 | Adaptive bias current generation for switched-capacitor circuits Techniques for adaptively generating bias current for a switched-capacitor circuit are described. The switched-capacitor circuit charges and discharges at least one switching capacitor at a sampling rate and may be a ΣΔ ADC that digitizes an analog signal at the s... | 07/06/2010 |
| 7719456 | Analog error correction for a pipelined charge-domain A/D converter A technique for correcting errors in Bucket Brigade Device (BBD)-based pipelined devices, such as Analog-to Digital Converters (ADCs). The gain between pipeline stages is desired to be a specific amount, such as unity: that is, all net charge present in each stage i... | 05/18/2010 |
| 7705764 | Method of algorithmic analog-to-digital conversion and algorithmic analog-to-digital converter Provided are a method of algorithmic analog-to-digital conversion and an algorithmic Analog-to-Digital Converter (ADC). The algorithmic ADC includes a Multiplying Digital-to-Analog Converter (MDAC). The MDAC includes a Digital-to-Analog Converter (DAC) for convertin... | 04/27/2010 |
| 7705765 | Systems and methods for characterizing component ratios and generating a digital representation of same Circuits and methods for determining component ratios are provided. An analog to digital converter circuit may include comparison capacitors arranged in an upper group and a lower group for quantizing analog signals into the digital domain. In addition to determinin... | 04/27/2010 |
