Power-on-reset circuitry

Details Power-on-reset circuitry Power-on-reset circuitry

2007-04-06

2009-12-29

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S077000, C327S078000

Reexamination Certificate

active

07639052

ABSTRACT:
Power-on-reset circuitry is provided for integrated circuits such as programmable logic device integrated circuits. The power-on-reset circuitry may use comparator-based trip point voltage detectors to monitor power supply voltages. The trip point detectors may use circuitry to produce trip point voltages from a bandgap reference voltage. Controller logic may process signals from the trip point detectors to produce a corresponding power-on-reset signal. The power-on-reset circuitry may contain a noise filter that suppresses noise from power supply voltage spikes. Normal operation of the power-on-reset circuitry may be blocked during testing. The power-on-reset circuitry may be disabled when the bandgap reference voltage has not reached a desired level. The power-on-reset circuitry may be sensitive or insensitive to the power-up sequence used by the power supply signals. Brownout detection blocking circuitry may be provided to prevent the output from one of the trip point detectors from influencing the power-on-reset circuitry.

REFERENCES:
patent: 4473759 (1984-09-01), Mahabadi
patent: 5243233 (1993-09-01), Cliff
patent: 5369310 (1994-11-01), Badyal et al.
patent: 5760624 (1998-06-01), McClintock
patent: 5821787 (1998-10-01), McClintock et al.
patent: 6204706 (2001-03-01), Horvath
patent: 6936998 (2005-08-01), Cho
patent: 7015732 (2006-03-01), Holloway et al.
patent: 7028270 (2006-04-01), Lam et al.
patent: 7030647 (2006-04-01), White et al.
patent: 7085870 (2006-08-01), Do
patent: 7142024 (2006-11-01), Youssef
patent: 2002/0101263 (2002-08-01), Kinoshita et al.
patent: 2006/0053242 (2006-03-01), Do
patent: 2004 279052 (2004-10-01), None
patent: 2004/023520 (2004-03-01), None

Affiliated with

Also associated with

Rating

Power-on-reset circuitry 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-on-reset circuitry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power-on-reset circuitry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4116649