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| Number | Title | Issue Date |
| 7978118 | Algorithmic analog-to-digital conversion A 1.5-bit algorithmic analog-to-digital converter (ADC) generates a digital value representative of an input voltage. The ADC implements a series of conversion cycles for a conversion operation. Each conversion cycle has three sub-cycles: a scaling sub-cycle, a firs... | 07/12/2011 |
| 7978117 | Multi-stage dual successive approximation register analog-to-digital convertor and method of performing analog-to-digital conversion using the same A multi-stage dual successive approximation register analog-to-digital converter (SAR ADC) and a method of performing analog-to-digital conversion using the same are provided. The multi-stage dual SAR ADC includes: a plurality of SAR ADC stages for converting an ana... | 07/12/2011 |
| 7973693 | Circuit with a successive approximation analog to digital converter During successive approximation analog to digital conversion a series of successive digital reference values is selected that converges towards a digital representation of an analog input signal. An analog reference signal is generated dependent on the successive di... | 07/05/2011 |
| 7952509 | Successive approximation A/D converter A successive approximation A/D conversion circuit for simultaneously sampling N channels of analog signals and for A/D converting the sampled analog signals, includes: N capacitive main DACs; a resistive sub DAC; N comparators; and a successive approximation control... | 05/31/2011 |
| 7916063 | Charge-sharing digital to analog converter and successive approximation analog to digital converter In one embodiment, an analog to digital converter includes a comparator having a first input, a second input and an output, the first input being coupled to an analog signal, a successive approximation register having a serial input coupled to the output of the comp... | 03/29/2011 |
| 7876254 | Data conversion circuitry having successive approximation circuitry and method therefor A data converter for converting analog signals to digital signals, or for converting digital signals to analog signals is provided. In one embodiment, a production self-test is provided. In one embodiment, a high-speed lower-resolution method or mode for a data conv... | 01/25/2011 |
| 7821441 | SAR analog-to-digital converter having variable currents for low power mode of operation A successive approximation analog-to-digital converter includes a capacitor array having a plurality of switch capacitors therein with varying weights, each having a common plate connected to a common node and a switched plate. A SAR controller samples an input volt... | 10/26/2010 |
| 7777662 | Analogue-to-digital converter and method for using the same An analogue-to-digital (A/D) converter converts an analogue input signal to a digital code representing the analogue input signal. The A/D converter includes a comparator for comparing the input signal with a reference signal, a search logic block for determining th... | 08/17/2010 |
| 7773023 | A-to-D converter A successive approximation type A-to-D converter includes a cyclic D-to-A converter (11), a comparator (12) for comparing an analog value with an output value of the D-to-A converter (11), and memory means (13) for sequentially storing an... | 08/10/2010 |
| 7764215 | Multi-stage comparator with offset canceling capacitor across secondary differential inputs for high-speed low-gain compare and high-gain auto-zeroing An Analog-to-Digital Converter (ADC) has a Successive-Approximation-Register (SAR) driving a digital-to-analog converter (DAC) that generates an analog voltage compared to an input voltage by a series of stages. The last stage feeds a compare signal to the SAR. Each... | 07/27/2010 |
| 7746262 | Coding method for digital to analog converter of a SAR analog to digital converter A method for coding a digital to analog converter of a successive approximation register analog to digital converter includes the steps of first switching capacitors associated with a bit from ground to a reference voltage. Next, a determination is made of whether a... | 06/29/2010 |
| 7724174 | Successive approximation ADC with binary error tolerance mechanism A successive approximation ADC is disclosed. A comparator receives and compares a sampled input signal and an output of a DAC. Non-binary successive approximation register (SAR) control logic controls sampling of the input signal and controls a sequence of compariso... | 05/25/2010 |
| 7701377 | Current steering DAC using thin oxide devices A current steering circuit includes a multitude of current stages each including an associated current source transistor, and first and second cascode transistors coupled in series with the associated current source transistor. The first and second cascode transisto... | 04/20/2010 |
| 7652612 | Cyclic pipeline analog-to-digital converter Some embodiments include apparatus and methods having a first module with a capacitor network configured to receive a sample of an analog input signal and an amplifier configured to couple to the capacitor network in a plurality of arrangements to successively gener... | 01/26/2010 |
| 7649488 | Low-power column parallel cyclic analog-to-digital converter A low-power column parallel cyclic analog-to-digital converter and an imaging device using the same. The analog-to-digital converter comprises one stage and is optimized to reduce power, noise and capacitor settling time. The one stage analog-to-digital converter co... | 01/19/2010 |
| 7642946 | Successive approximation analog to digital converter A system and method are provided allowing for successive approximation analog to digital conversion. A first differential voltage is sampled and held during a first cycle. The first differential voltage is converted to a differential current. A second differential v... | 01/05/2010 |
| 7642945 | AD converter circuit and microcontroller A successive approximation type AD converter circuit for comparing an analog input signal with an output analog signal of a DA converter with a comparator to input a digital signal output in accordance with a comparison result to the DA converter to determine a digi... | 01/05/2010 |
| 7623056 | Photoelectric conversion apparatus Providing a configuration that, when an AD converter is provided for each of pixel columns, enables each of the elements to be arranged without increasing the element arrangement pitch. A photoelectric conversion apparatus according to the present invention includes... | 11/24/2009 |
| 7605741 | Digitally corrected SAR converter including a correction DAC An analog to digital converter having improved differential non-linearity is provided. The converter has a memory which is used to look up the actual weight or a weight error corresponding to the bits that have been kept as part of the SAR process to form an output ... | 10/20/2009 |
| 7589659 | Successive approximation analog to digital converter A successive approximation analog to digital converter comprising a plurality of capacitors which during a successive approximation conversion are selectively connectable to a first reference or a second reference under the command of a controller. During a conversi... | 09/15/2009 |
| 7579975 | DAC architecture for an ADC pipeline A residue block in a stage of a pipeline ADC processing differential signals contains multiple pairs of capacitors. During a hold phase of operation, one capacitor of a pair is connected to a positive reference voltage, and the other capacitor is connected to a nega... | 08/25/2009 |
| 7576678 | Successive approximation analog/digital converter and associated integrated component and conversion method A successive approximation analog/digital converter is provided, which includes a successive approximation register supplying a digital/analog converter, first means of comparing an input signal of the analog/digital converter to an output signal of the digital/anal... | 08/18/2009 |
| 7486218 | Cyclic analog-to-digital converter An A/D converter includes an A/D conversion circuit, a multiplying D/A converter, a switch circuit, and a control circuit. The control circuit prevents an A/D output of the A/D conversion circuit from being input to the D/A converter and controls the switch circuit ... | 02/03/2009 |
| 7443333 | Single stage cyclic analog to digital converter with variable resolution A converter (200) adapted to convert an analog input signal into a digital output signal includes an analog input terminal (205) for receiving the analog input signal, a Redundant Signed Digit (RSD) stage (210) coupled to the analog input termin... | 10/28/2008 |
| 7439898 | Parallel digital processing for reducing delay in SAR ADC logic The analog-to-digital for converter (ADC) for converting an analog value into a digital equivalent using a parallel digital data path is disclosed. In one example embodiment, the ADC includes a switched capacitor DAC having an input to receive an analog value via an... | 10/21/2008 |
| 7432844 | Differential input successive approximation analog to digital converter with common mode rejection A Successive Approximation Routine converter is provided in which a comparator is responsive to an output of a first Digital to Analog Converter, and an output of a second Digital to Analog Converter and to a DAC common mode output reference voltage, and wherein the... | 10/07/2008 |
| 7414562 | Analog-to-digital conversion using asynchronous current-mode cyclic comparison An asynchronous cyclic current-mode analog-to-digital converter (ADC) is disclosed. The ADC comprises a plurality of sub-ADCs cascading from the first stage to the last stage, each sub-ADC comprising a current-mode ADC having a digital output, an analog current inpu... | 08/19/2008 |
| 7391354 | Semiconductor integrated circuit One input terminals of switches respectively coupled to capacitors of a capacitance array type D/A converter configured as a main DAC are coupled to a first external terminal of an IC. On the other hand, a current switching type D/A converter of a resistance string ... | 06/24/2008 |
| 7385547 | Minimized differential SAR-type column-wide ADC for CMOS image sensors An analog-to-digital converter comprising a minimal amount of circuitry for conversion of an input analog signal to a series of digital bits. A differential comparator is provided for generating digital values to which the digital bits correspond. A pair of digital-... | 06/10/2008 |
| 7382308 | Reference buffer using current mirrors and source followers to generate reference voltages A reference buffer includes a first current mirror, a second current mirror, a first source follower coupled in series to a branch of the first current mirror and receiving a first initial reference voltage and outputting a first reference voltage, a second source f... | 06/03/2008 |
| 7382302 | A/D converter with voltage generation circuits An A/D converter has a first voltage generation circuit, a second voltage generation circuit, a comparator, first and second switch circuits connected in series between an input terminal of an analog input voltage and an output terminal of the first voltage generati... | 06/03/2008 |
| 7372389 | Analogue to digital converter, and method of analogue to digital conversion Embodiments of the invention provide an analogue to digital converter comprising a dual differential digital to analogue converter (DAC) having first and second digital inputs for first and second digital input signals respectively, and having first and second analo... | 05/13/2008 |
| 7356424 | Diagnostic compiler for pipeline analog-to-digital converter, method of compiling and test system employing the same The present invention is directed to a diagnostic compiler for use with a pipeline analog-to-digital converter (ADC) having code sequences corresponding to stages thereof. In one embodiment, the diagnostic compiler includes a transition locator configured to determi... | 04/08/2008 |
| 7352311 | Continuous time noise shaping analog-to-digital converter A system for a continuous time noise shaping analog-to-digital converter (“ADC”) with a suppressed carrier pulse width modulated (“PWM”) quantizer is disclosed. In particular, a suppressed carrier feedback signal may expand the dynamic range of a sigma delta... | 04/01/2008 |
| 7342530 | Successive approximation analog/digital converter A successive approximation analog/digital converter converting an analog input signal into a digital output value by means of a plurality of successive conversion cycles, comprises at least one first input for injecting an analog input signal, a controllable capacit... | 03/11/2008 |
| 7339505 | Image compression and decompression Techniques employable to compress and decompress images are presented herein. ... | 03/04/2008 |
| 7336214 | Analog to digital converter circuit with offset reduction and image sensor using the same An image sensor may be improved by using ADCs that compensate for the effect of comparator input offset on comparator decisions. Offset compensation may be implemented in an ADC by using an amplifier section between the input of the ADC and a comparator section of t... | 02/26/2008 |
| 7330146 | Minimized SAR-type column-wide ADC for image sensors An improved analog-to-digital converter wherein a minimal amount of circuitry is provided for conversion of an analog signal to a series of digital bits. A comparator is provided for generating digital values to which the digital bits correspond. A digital-to-analog... | 02/12/2008 |
| 7330145 | Dual residue pipelined analog-to-digital converter Consistent with an example embodiment, there is dual residue pipelined AD converter comprising a cascade of, preferably balanced, switched capacitor dual residue converter stages for producing from first and second residue input signals one or more digital bits and ... | 02/12/2008 |
| 7321327 | Data converters 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 ... | 01/22/2008 |
