Self auto-calibration of analog circuits in a mixed signal...

Details Self auto-calibration of analog circuits in a mixed signal... Self auto-calibration of analog circuits in a mixed signal...

2011-07-05

2011-07-05

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S120000, C341S163000, C330S009000

Reexamination Certificate

active

07973684

ABSTRACT:
Auto-calibration of the analog circuits occurs when requested by a user and/or the occurrence of an event(s). The user may invoke an auto-calibration on demand through an auto-calibration (ACAL) input to the mixed-signal integrated circuit. An external voltage calibration (VCAL) input may be used for auto-calibration of the mixed-signal integrated circuit to a user-supplied common-mode voltage reference. Auto-calibration of the mixed-signal integrated circuit may also be initiated upon the occurrence of any one or more of the following events: 1) detection of auto-calibration data corruption, e.g., parity checking of auto-calibration data values digitally stored in the mixed-signal integrated circuit; 2) an internal timer that causes a calibration request after a programmable timeout period, 3) change in the internal integrated circuit die temperature as determined by a temperature sensor, and 4) a change in the power supply and/or internal supply voltage(s).

REFERENCES:
patent: 6034569 (2000-03-01), Lan et al.
patent: 6459335 (2002-10-01), Darmawaskita et al.
patent: 7463087 (2008-12-01), Thiery
patent: 7532065 (2009-05-01), Chen et al.
patent: 7636013 (2009-12-01), Bach
patent: 02/27943 (2002-04-01), None
International PCT Search Report and Written Opinion, PCT/US2009/062043, 10 pages, Mailed Mar. 18, 2010.

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