Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-12-12
2006-12-12
Zweizig, Jeffrey (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S143000
Reexamination Certificate
active
07148742
ABSTRACT:
Power detection circuitry that provides a substantially constant trip-point is provided. The circuitry is immune to temperature and process variations, thus preventing premature or delayed enablement of utilization circuitry (e.g., memory). In addition, the trip-point remains constant during both slow and fast power up and power down conditions. This may be accomplished with the use of bandgap reference circuitry that provides a stable bandgap reference voltage when operating in its stable operating region. The bandgap circuitry operates in conjunction with startup circuitry, which enables the bandgap circuitry to operate in its non-stable operating region. When in the non-stable region, the bandgap circuitry provides a source voltage as the reference voltage until the source voltage begins to approach the bandgap voltage, at which point the bandgap circuitry provides the stable bandgap reference voltage as the reference voltage.
REFERENCES:
patent: 5477176 (1995-12-01), Chang et al.
patent: 5530398 (1996-06-01), Shamlou et al.
patent: 5610506 (1997-03-01), McIntyre
patent: 5818292 (1998-10-01), Slemmer
patent: 6642776 (2003-11-01), Micheloni et al.
patent: 6661713 (2003-12-01), Kuo
patent: 6677808 (2004-01-01), Sean et al.
patent: 6690228 (2004-02-01), Chen et al.
patent: 6707707 (2004-03-01), Marr
patent: 0 713 166 (1999-09-01), None
patent: 0 676 857 (2002-01-01), None
Lin Feng (Dan)
Pan Dong
Silvestri Paul A
Court Andrew Van
Fish & Neave IP Group of Ropes & Gray LLP
Zweizig Jeffrey
LandOfFree
Power supply voltage detection circuitry and methods for use... 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 supply voltage detection circuitry and methods for use..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply voltage detection circuitry and methods for use... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3697277