Analog-to-digital converter

Details Analog-to-digital converter Analog-to-digital converter

2006-10-27

2008-08-19

Williams, Howard (Department: 2819)

Coded data generation or conversion

Sample and hold

C341S172000

Reexamination Certificate

active

07414556

ABSTRACT:
The invention relates to signal processing circuits, analog-to-digital conversion circuits (A/D conversion circuit) and track and hold and sample and hold circuits. A circuit transfers charge from a first capacitor to a second one5where the transfer is enhanced by means of a control signal which influences the value of at least one capacitor. This circuit can be used as an amplifier or a sample and hold circuit, and does not consume any standing current. This circuit can be advantageously combined with a novel capacitor arrangement which allows the generation of multiple residues and reference levels, and the carrying out of multiple operations in parallel. This can improve the overall performance of analog-to-digital converters, including multi-step converters as pipeline and successive approximation converters. The present invention provides amplification and sampling of signals without standing current, and generation of many reference levels and multiple residues in parallel. The present invention allows to eliminate the integrators in traditional analog-to-digital converters and therefore offers reduces power and enhances performance of analog-to-digital converters.

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patent: 0 159 709 (1985-10-01), None

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