Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2006-06-27
2009-02-24
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S333000, C326S062000
Reexamination Certificate
active
07495483
ABSTRACT:
An input buffer for CMOS integrated circuits using sub-micron CMOS technology is affected by the presence of high voltage between various ports of a device. An improvement for such a buffer provides an input voltage limiting circuit making the device mode tolerant to high voltages while using low voltage tolerant CMOS devices. This improvement also reduces the switching level uncertainty due to manufacturing process variations by adding compensation devices to a first inverter stage in the input buffering stage so as to increase noise margin. A hysteresis characteristic is produced by the circuit thus reducing the effect of manufacturing process variation. The circuit can be easily interfaced to other blocks and safely operates in conjunction with relatively high voltage CMOS technology circuitry while achieving the high-speed advantage of thin gate oxide. Low power consumption is achieved by avoiding the possibility of DC current flow in the circuitry.
REFERENCES:
patent: 5465054 (1995-11-01), Erhart
patent: 5939932 (1999-08-01), Lee
patent: 6184704 (2001-02-01), Wang et al.
patent: 6236236 (2001-05-01), Chen
patent: 6346829 (2002-02-01), Coddington
patent: 6392440 (2002-05-01), Nebel
patent: 6784700 (2004-08-01), Hunt et al.
patent: 6784717 (2004-08-01), Hunt et al.
patent: 2005/0286333 (2005-12-01), Gupta et al.
Agrawal Vinayak
Garg Paras
Kumar Niraj
Donovan Lincoln
Gardere Wynne & Sewell LLP
Nguyen Hai L.
STMicroelectronics Pvt. Ltd.
LandOfFree
Input buffer for CMOS 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 Input buffer for CMOS integrated circuits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Input buffer for CMOS integrated circuits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4138258