Distributed current sources for folding ADC amplifier stages

Details Distributed current sources for folding ADC amplifier stages Distributed current sources for folding ADC amplifier stages

2007-06-26

2007-06-26

Nguyen, Linh V. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S144000, C341S136000

Reexamination Certificate

active

10763561

ABSTRACT:
A circuit for reducing the maximum magnitude of the total current on each of a plurality of buses for an amplifier stage in a folding analog to digital converter. Each amplifier stage bus couples multiple transconductance circuits to a load. Also, each of the transconductance circuits is configured to output a separate transconductance current to its respective bus. Separate current source circuits are configured to provide a separate source current locally at the output of each of the transconductance circuits such that substantially less than the full amount of each transconductance current reaches the respective bus.

REFERENCES:
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patent: 5307067 (1994-04-01), Kimura et al.
patent: 5640163 (1997-06-01), Nauta et al.
patent: 5905452 (1999-05-01), Baek
patent: 6100836 (2000-08-01), Bult
patent: 6157257 (2000-12-01), Murphy
patent: 6339391 (2002-01-01), Chung et al.
patent: 6570522 (2003-05-01), Galambos et al.

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