Method and apparatus for performing switched supply drive in CMO

Details Method and apparatus for performing switched supply drive in CMO Method and apparatus for performing switched supply drive in CMO

1996-06-21

1998-12-08

Santamauro, Jon

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Output switching noise reduction

326 86, 326 87, H03K 190185, H03K 1716

Patent

active

058475753

ABSTRACT:
A driver circuit for limiting electrical noise on a quiescent signal is provided which includes a Transition High Driver circuit, a Transition Low Driver circuit, a Quiescent High Driver circuit, and a Quiescent Low Driver circuit. The driver circuit comprises means for driving an electrical signal with a presumed noisy Transition Power Supply network while it is transitioning from a low voltage level to a high voltage level or vice versa. The signal is driven by the Transition Power Supply network until the electrical signal reaches its quiescent voltage level. At this time, the signal is no longer driven by the Transition Power Supply network but rather by a presumed clean Quiescent Power Supply network. In this manner, noise from transitioning signals is prevented from coupling onto quiescent signals.

REFERENCES:
patent: 4731553 (1988-03-01), Van Lehn et al.
patent: 5063308 (1991-11-01), Borkar
patent: 5319260 (1994-06-01), Wanlass
patent: 5493232 (1996-02-01), Kube
patent: 5500610 (1996-03-01), Burstein
patent: 5523702 (1996-06-01), Maeda
patent: 5585740 (1996-12-01), Tipon
patent: 5652527 (1997-07-01), Phillips et al.

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