Input common-mode voltage feedback circuit for...

Details Input common-mode voltage feedback circuit for... Input common-mode voltage feedback circuit for...

2006-03-07

2006-03-07

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S120000

Reexamination Certificate

active

07009541

ABSTRACT:
A novel circuit is used to monitor the common-mode voltage at the summing junctions of the first integrator in a continuous-time ΣΔ ADC, wherein the circuit produces a control voltage which adjusts the quiescent current of the feedback DAC to compensate for any common-mode offset current. Since the adjustment takes place within the feedback DAC, there is no extra noise added to the differential signal path. The implementation provides for no degradation to the SNR of the converter.

REFERENCES:
patent: 4918399 (1990-04-01), Devecchi et al.
patent: 5039989 (1991-08-01), Welland et al.
patent: 5426385 (1995-06-01), Lai
patent: 5442352 (1995-08-01), Jackson
patent: 6603356 (2003-08-01), Kim et al.
patent: 6697001 (2004-02-01), Oliaei et al.
patent: 6803794 (2004-10-01), Martin et al.
patent: 6853323 (2005-02-01), Chen et al.
patent: 2001/0020870 (2001-09-01), Laaser
patent: 2004/0189392 (2004-09-01), Kimura
patent: 2004/0239783 (2004-12-01), Imaizumi et al.
“Input Common-Mode Feedback Technique for Very Low Voltage CMOS Amplifiers”, Duque-Carrillo et al.,IEEE 1999 International Symposium on Circuits and Systems Proceedings, vol. 2, pp. 25-28 (Jul. 1999).

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