Off chip driver circuit

Details Off chip driver circuit Off chip driver circuit

1996-06-27

1997-06-03

Westin, Edward P.

Electronic digital logic circuitry

Interface

Supply voltage level shifting

326 17, 326 27, 326 86, H03K 190948, H03K 190185

Patent

active

056358610

ABSTRACT:
Disclosed is an improved push-pull off-chip driver circuit. The circuit includes a push-pull amplifier including a pull-up transistor and a pull-down transistor, each provided with independent inputs and connected at the output node. The input to the pull-up transistor is provided by a transmission gate having an n-channel transistor connected in parallel with a p-channel transistor. A control transistor is coupled between the output node and the gate of the pull-up transistor to provide a protective bias. A feedback override circuit is coupled between the output node and the gate of the p-channel transmission gate transistor to selectively provide either Vout or a low level potential to that gate. The feedback override circuit improves the response time and noise immunity of a prior art off-chip driver in the active mode in a manner consistent with the objectives of protecting the gate oxides from high voltage stress and prevent leakage currents during the high-impedance mode.

REFERENCES:
patent: 4157268 (1979-06-01), Bergeron et al.
patent: 4296335 (1981-10-01), Simcoe
patent: 4663701 (1987-05-01), Stotts
patent: 4709162 (1987-11-01), Braceras et al.
patent: 4782250 (1988-11-01), Adams et al.
patent: 4896057 (1990-01-01), Yang et al.
patent: 5004936 (1991-04-01), Andresen
patent: 5054001 (1991-10-01), Guillot
patent: 5151619 (1992-09-01), Austin et al.
patent: 5155392 (1992-10-01), Nogle
patent: 5191555 (1993-03-01), Tobacco et al.
patent: 5233238 (1993-08-01), Mattos
patent: 5396128 (1995-03-01), Dunning et al.
patent: 5406140 (1995-04-01), Wert et al.
patent: 5418476 (1995-05-01), Strauss
patent: 5424659 (1995-06-01), Stephens et al.
patent: 5451889 (1995-09-01), Heim et al.

Affiliated with

Also associated with

Rating

Off chip driver circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Off chip driver circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Off chip driver circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-394070