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| Number | Title | Issue Date |
| 8358228 | Method for modifying the LMS algorithm to reduce the effect of correlated perturbations A process allows for the modification of the least-means-square (LMS) algorithm to remove perturbations associated with measured signals in an analog-to-digital converter (ADC). The process includes measuring the perturbations and determining a coefficient associate... | 01/22/2013 |
| 8339303 | Method for improving the performance of the summing-node sampling calibration algorithm An integrated circuit allows for the isolation of the input of an analog-to-digital converter (ADC) from a summing-node (SNS) algorithm. The integrated circuit contains a gating device that is controlled by bits of a flash analog-to-digital converter (ADC) to gate i... | 12/25/2012 |
| 8339161 | High performance voltage buffers with distortion cancellation A voltage buffer may include a first signal path extending from an input terminal to an output terminal in which the first signal path further may include a buffer transistor that may have a control terminal, and a first and second current terminals responsive to th... | 12/25/2012 |
| 8115518 | Integrated circuit for reducing nonlinearity in sampling networks An integrated circuit allows for the correction of distortion at an input of a sampling network. The integrated circuit contains a first bootstrap circuit to drive a sampling network transistor and a second bootstrap circuit to separate the back-gate terminal of the... | 02/14/2012 |
| 8068045 | Calibration methods and structures for pipelined converter systems Calibration methods and structures are provided for pipelined analog-to-digital converter systems. They are arranged to process samples of the digital codes with an algorithm that is preferably configured to repeatedly update an estimate of the transfer function wit... | 11/29/2011 |
| 8018254 | Reducing device parasitics in switched circuits A system and method are provided to reduce the influence of parasitic capacitance at the drain and source of MOS transistors of a sampling circuit. In one embodiment, the bulk is left floating during a first phase and refreshed during a second phase. During the firs... | 09/13/2011 |
| 7830288 | Fast, efficient reference networks for providing low-impedance reference signals to signal processing systems Reference network embodiments are provided for use in pipelined signal converter systems. The network embodiments are fast and power efficient and they generate low-impedance reference signals through the use of at least one output transistor, a diode-coupled transi... | 11/09/2010 |
| 7786910 | Correlation-based background calibration of pipelined converters with reduced power penalty A device and method for correlation-based background calibration of pipelined converters with a reduced power penalty. A pipelined analog-to-digital converter (ADC) utilizes a random or pseudorandom signal to reduce the quantization error of subconverting stages. St... | 08/31/2010 |
| 7746171 | Amplifier networks with controlled common-mode level and converter systems for use therewith Effective control of the common-mode level of amplifiers is obtained through control structures (both closed-loop and open-loop structures) which are directed to various amplifier functions such as the reduction of amplifier loading, accurate sensing of common-mode ... | 06/29/2010 |
| 7728752 | Residue generators for reduction of charge injection in pipelined converter systems Pipelined converter systems include a plurality of converter stages in which some stages generate and pass a residue signal to a succeeding stage for further conversion. The generation of the residue signal can inject spurious charges into a reference source that is... | 06/01/2010 |
| 7719452 | Pipelined converter systems with enhanced linearity Signal converter system embodiments are provided to substantially reduce symmetrical and asymmetrical conversion errors. Signal-processing stages of these embodiments may include a signal sampler in addition to successively-arranged signal converters. In system embo... | 05/18/2010 |
| 7652601 | Fast, efficient reference networks for providing low-impedance reference signals to signal processing systems Reference network embodiments are provided for use in pipelined signal converter systems. The network embodiments are fast and power efficient and they generate low-impedance reference signals through the use of a complimentary common-drain output stage, at least on... | 01/26/2010 |
| 7636057 | Fast, efficient reference networks for providing low-impedance reference signals to signal converter systems Reference network embodiments are provided for use in pipelined signal converter systems. The network embodiments are fast and power efficient and they generate low-impedance reference signals through the use of a complimentary common-drain output stage, an output c... | 12/22/2009 |
| 7414564 | Enhanced-accuracy converter stages for pipelined signal converter systems Converter systems are provided which complement sample capacitors in at least one converter stage with replica capacitors. The replica capacitors are switched to receive replica charges from the analog input signal during the same operational mode in which the sampl... | 08/19/2008 |
| 7271750 | Pipelined converter systems with enhanced accuracy Converter system embodiments are formed with signal-processing stages which include successive signal converters and a preceding signal sampler wherein all but a last one of the stages provides an output signal to a succeeding one of the stages and all of said signa... | 09/18/2007 |
| 7253686 | Differential amplifiers with enhanced gain and dynamic range Differential amplifier embodiments are provided for amplifying input signals with enhanced gain and dynamic range. They include first and second amplifier stages and at least one common-mode feedback circuit that is arranged to mirror and adjust a tail current to co... | 08/07/2007 |
| 7221191 | Signal samplers with enhanced dynamic range Signal sampler embodiments are provided for processing input signals along signal paths in response to mode-command signals. They include a follower transistor with a control terminal and a current terminal that establish at least part of a signal path. They also in... | 05/22/2007 |
| 7215182 | High-performance, low-noise reference generators Generators are provided for supplying reference signals that are especially suited to signal conditioning systems such as analog-to-digital converters. They generate reference signals with low output impedances that reduce spurious signals and shorten recovery times... | 05/08/2007 |
