Oscillators – With frequency calibration or testing
Reexamination Certificate
2005-03-29
2005-03-29
Mis, David (Department: 2817)
Oscillators
With frequency calibration or testing
C331S049000, C331S065000, C331S066000, C331S173000, C327S141000, C327S151000, C327S160000
Reexamination Certificate
active
06873215
ABSTRACT:
A power down system and method for an integrated circuit that enables a power down mode to be maintained for a predetermined time is described herein. The power down system comprises an oscillator, a low power oscillator and an oscillator control circuit controlling both the oscillator and the low power oscillator. The oscillator control circuit including at least one real time counter. The oscillator control circuit being so configured that the oscillator is energized when said oscillator control circuit is in a normal mode and that, when a power down signal is received: a) the oscillator control circuit measures an oscillation frequency of the low power oscillator, b) the oscillator control circuit uses the measured oscillation frequency of the low power oscillator to set the real time counter so as to maintain the power down mode for the predetermined time, c) the oscillator control circuit turns off the oscillator and uses the low power oscillator for the duration of the power down.
REFERENCES:
patent: 5058203 (1991-10-01), Inagami
patent: 5142699 (1992-08-01), Sato et al.
patent: 5280650 (1994-01-01), Sobti
patent: 5283568 (1994-02-01), Asai et al.
patent: 5428820 (1995-06-01), Okada et al.
patent: 5448755 (1995-09-01), Tanaka
patent: 5845204 (1998-12-01), Chapman et al.
patent: 6029061 (2000-02-01), Kohlschmidt
patent: 6091527 (2000-07-01), Brisse et al.
patent: 6111927 (2000-08-01), Sokoler
patent: 6311081 (2001-10-01), Northcutt et al.
patent: 6353749 (2002-03-01), Siponen
patent: 6356956 (2002-03-01), Deo et al.
patent: 6415388 (2002-07-01), Browning et al.
patent: 6434405 (2002-08-01), Sashihara
patent: 6469989 (2002-10-01), Ernst
patent: 6473607 (2002-10-01), Shohara et al.
patent: 6650189 (2003-11-01), Romao
patent: 20020000889 (2002-01-01), Kim
patent: 99 04099 (1999-01-01), None
Devries Christopher Andrew
Mason Ralph Dickson
ENQ Semiconductor Inc.
Mathews, Collins Shepherd & McKay, P.A.
Mis David
LandOfFree
Power down system and method for integrated circuits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power down system and method for integrated circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power down system and method for integrated circuits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3426309