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| Number | Title | Issue Date |
| 8188901 | Superconductor analog to digital converter Superconductor analog-to-digital converters (ADC) offer high sensitivity and large dynamic range. One approach to increasing the dynamic range further is with a subranging architecture, whereby the output of a coarse ADC is converted back to analog and subtracted fr... | 05/29/2012 |
| 8159382 | Low power converter and shutdown SAR ADC architecture With Successive Approximation Register (SAR) analog-to-digital converters (ADCs), there are several different architectures. One of these architectures is a “convert and shut down” architecture, where an internal amplifier is powered down during the sampling pha... | 04/17/2012 |
| 8106805 | Self-calibrating pipeline ADC and method thereof An inter-stage gain of a conversion stage of a pipeline ADC is calibrated by imposing a perturbation to a sub-ADC within the conversion stage and adjusting a gain factor in a closed loop manner so as to make a conversion output substantially independent of the pertu... | 01/31/2012 |
| 8102294 | Solid-state image sensor A solid-state image sensor includes a pixel array, and an analog to digital converter for converting a voltage signal read from the pixel array from analog to digital form, wherein the analog to digital converter includes a counter counting a first clock signal for ... | 01/24/2012 |
| 8077069 | Two-step subranging ADC architecture First and second track and hold stages track and store an input voltage for a sample of an analog input signal. A coarse reference ladder provides a plurality of coarse references. In one embodiment, the coarse reference ladder includes a first coarse reference and ... | 12/13/2011 |
| RE42878 | Analog-to-digital converting system A novel analog-to-digital converter (ADC) architecture using subranging successive approximation approach is disclosed. The ADC architecture is capable of achieving high sampling rate, low power consumption and low complexity. It is also able to advance the chip pro... | 11/01/2011 |
| 8049652 | Reference pre-charging for two-step subranging ADC architecture A coarse reference ladder provides a plurality of coarse references. A coarse ADC receives an input voltage. The coarse ADC performs a first comparison of the input voltage and the plurality of coarse references and outputs a coarse output. A switch matrix is config... | 11/01/2011 |
| 8018368 | A/D converter An analog to digital converter includes: a reference circuit adapted to generate reference voltages; differential amplifiers; normal phase circuits each of which samples a normal phase analog input signal and transfers a comparison voltage, obtained by comparison wi... | 09/13/2011 |
| 7982652 | Analog-to-digital converter A method of analog-to-digital conversion over n bits of an analog signal, including the steps of: comparing the amplitude of the analog signal with a threshold representing the amplitude of the full-scale analog signal divided by 2k, where k is an integer... | 07/19/2011 |
| 7924203 | Most significant bits analog to digital converter, and an analog to digital converter including a most significant bits analog to digital converter A most significant bits analog to digital converter for determining a first P bits of an N bit analog to digital conversion, the most significant bits analog to digital converter comprising: a digital to analog converter a capacitive attenuator, and a switching arra... | 04/12/2011 |
| 7920084 | Unified architecture for folding ADC A system, apparatus and method for a folding analog-to-digital converter (ADC) are described. The general architecture of the folding ADC includes an array (1-N) of cascaded folding amplifier stages, a distributed array of fine comparators, and an encoder. Ea... | 04/05/2011 |
| 7884748 | Ramp-based analog to digital converters The invention provides an analog-to-digital converter (ADC) of the single ramp type, comprising a ramp generator (101), a clock (102), a digital counter (103) timed by the clock (102), and at least one channel (101, .... | 02/08/2011 |
| 7796077 | High speed high resolution ADC using successive approximation technique An analog to digital converter (ADC) containing a sub-ADC to resolve at least some of the bits using successive approximation principle (SAP), while providing various improvements. According to one aspect, another sub-ADC is used to resolve some of the bits in paral... | 09/14/2010 |
| 7791524 | Solid-state imaging device, semiconductor integrated circuit, and signal processing method A solid-state imaging device includes: pixel circuits arranged in a matrix which perform photoelectric conversion on received light; and an AD conversion unit converting the resultant signal voltage of the photoelectric conversion. The AD conversion unit includes: a... | 09/07/2010 |
| 7791523 | Two-step sub-ranging analog-to-digital converter and method for performing two-step sub-ranging in an analog-to-digital converter A two-step ADC is provided that achieves significant improvements in the settling time window available for CDAC conversion, FADC sub-ranging and FADC conversion without increasing the amount of chip area or power that are consumed by the ADC. The ADC uses interleav... | 09/07/2010 |
| 7773022 | Operating NAND cells using multiple levels for each data value A system and method, including computer software, for storing digital information uses multiple NAND flash memory cells. Each memory cell is adapted to receive charge during a write operation to an analog voltage that corresponds to a data value having a binary repr... | 08/10/2010 |
| 7737873 | Flash A/D converter A flash analog-to-digital converter comprising a resistive reference ladder, a set of comparators for comparing the analog input signal with the reference voltages of the ladder to provide a digital code representing a coarse quantization of the input signal, a set ... | 06/15/2010 |
| 7710305 | Unified architecture for folding ADC A system, apparatus and method for a folding analog-to-digital converter (ADC) are described. The general architecture of the folding ADC includes an array (1-N) of cascaded folding amplifier stages, a distributed array of fine comparators, and an encoder. Each fold... | 05/04/2010 |
| 7642943 | Analog-to-digital converter circuit and method with programmable resolution Disclosed are a circuit and a method for an analog-to-digital conversion with programmable resolution. The circuit includes a resistor ladder comprising a plurality of resistors coupled to a plurality of comparators; wherein the resistor ladder is further coupled to... | 01/05/2010 |
| 7626531 | Systems and methods for analog to digital conversion Various different approaches are provided for conversion of analog signals to digital signals. For example, various partially clocked, multi-step analog to digital converters are discussed. Such analog to digital converters include a clocked fine conversion stage, a... | 12/01/2009 |
| 7579974 | Digitizer for a digital receiver system A digitizer for a digital receiver system includes an input terminal to receive a modulated analog input voltage signal, and an output terminal to provide an output voltage signal being a digital conversion of the input voltage signal. A comparator circuit has an ou... | 08/25/2009 |
| 7564395 | Subranging converter for converting an analog signal into an N-bit digital signal A subranging analog-to-digital converter is disclosed. The converter includes: a divided voltage generation circuit that equally divides a range of a predetermined voltage, and generates 2m+1 divided voltages; a higher-order conversion circuit that genera... | 07/21/2009 |
| 7554476 | Ad conversion method, apparatus thereof, solid-state imaging device, driving method thereof, and imaging apparatus An analog-to-digital conversion method includes the steps of outputting an upper-bit conversion reference signal, obtaining a digital value of upper bits on the basis of a period of time from a set time to the time when a magnitude relation between the analog signal... | 06/30/2009 |
| 7535399 | Reference voltage shifting technique for optimizing SNR performance in pipeline ADCs with respect to input signal An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a plurality of digital intermediate signals in response to an analog input signal, a first set of threshold and reference voltages and a second set of thres... | 05/19/2009 |
| 7532144 | AD converter and radio receiver Disclosed is an AD converter including: a first conversion stage including a quantizing part to generate m parallel pieces of quantized signals from m pieces of input analog signals representing n-dimensional vectors (n≦m≦2n), a decoding part to generate m piece... | 05/12/2009 |
| 7525470 | Phase control for interleaved analog-to-digital conversion for electronic dispersion compensation Embodiments include a system for performing dispersion compensation on an electromagnetic signal received over a communication channel, the electromagnetic signal bearing information at a symbol rate. An interleaved analog to digital converter (“ADC”) block may ... | 04/28/2009 |
| 7515083 | Analog-to-digital converting system A novel analog-to-digital converter (ADC) architecture using subranging successive approximation approach is disclosed. The ADC architecture is capable of achieving high sampling rate, low power consumption and low complexity. It is also able to advance the chip pro... | 04/07/2009 |
| 7492302 | Analog-to-digital converter with reduced metastable errors In an analog-to-digital converter, an analog-to-digital conversion stage comprising a comparator and an analog residual signal generator. The comparator is operable to compare an analog input signal or a sample of the analog input signal with a threshold to generate... | 02/17/2009 |
| 7482965 | Digital chirp waveform generator and method A chirp waveform generator for producing a chirp waveform ƒ(t)=sin (t2 modulus m) where modulus m is represented by n submoduli and/or factored submoduli m1-mn. Sequence generators generate digital sequence values representative of ... | 01/27/2009 |
| 7479914 | A-D converter and A-D convert method An A-D converter includes a plurality of comparators, each of which compares an analog input signal to analog threshold values; an upper field determination section which, during an upper determination phase, supplies in parallel to each of the plurality of comparat... | 01/20/2009 |
| 7477177 | A-D converter, A-D convert method, and A-D convert program An A-D converter that outputs a digital output signal obtained by digitalizing an analog input signal includes a plurality of comparators that each compare the analog input signal and an analog threshold value based on designated digital threshold data, a high-order... | 01/13/2009 |
| 7460049 | Power-to-digital converter A power-to-digital converter (PDC) converting a signal power to digital code. The PDC comprises a power detector, an analog-to-digital converter (ADC), and a timing and logic control circuit. The power detector receives the signal power and generates a DC output and... | 12/02/2008 |
| 7443326 | Digital input signals constructor providing analog representation thereof A digital to analog waveform converter featuring a DSP, discrete output devices, and Multi Input Multi Output (MIMO) device, wherein the MIMO device includes low accuracy components featuring high speed and low power. ... | 10/28/2008 |
| 7429944 | Converter systems having reduced-jitter, selectively-skewed interleaved clocks Converter systems are provided that use particular combinations of fixed and variable clock skewers to generate interleaved clock signals for the systems. These combinations have been found effective in accurately generating selectively-skewed clocks while simultane... | 09/30/2008 |
| 7429945 | Analog to digital converter The invention relates to an analog-to-digital converter comprising a reference voltage generating circuit, two coarse/fine comparators and two encoders for encoding the comparison result of the two coarse/fine comparators. In the invention, the two coarse/fine compa... | 09/30/2008 |
| 7411537 | Digitizer arrangement A digitizer arrangement for converting an analogue signal into a digital signal, including a first A/D converter, said first A/D converter being arranged to convert said analogue signal into a first digital signal with a first sampling rate, the first sampling rate ... | 08/12/2008 |
| 7405690 | Analog-to-digital converter An A-D converter includes a first amplifier circuit, an A-D converter circuit, a D-A converter circuit, a subtraction circuit, a second amplifier circuit, a timing control circuit, a type control unit, an output unit. The type control unit sets the type of the A-D c... | 07/29/2008 |
| 7405689 | Predictive analog to digital converters and methods of using Methods and devices perform analog to digital signal conversion in shorter time and/or with less power consumption than that of a comparable analog to digital conversion that uses a conventional sequential approximation method based on a binary search. A predictive ... | 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 |
| 7400286 | Device and method for use in the verification of handwriting A device (10) for use in the verification of handwriting, comprising: a body (12) having a surface (11) over which a writing instrument (8) is moved during the generation of a piece of handwriting; a transducer (14) for transducing... | 07/15/2008 |
