Power down system and method for integrated circuits

Oscillators – With frequency calibration or testing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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.

Rate now

     

Profile ID: LFUS-PAI-O-3426309

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.