Integrated circuit output buffers having duration sensitive outp

Details Integrated circuit output buffers having duration sensitive outp Integrated circuit output buffers having duration sensitive outp

1996-09-12

1998-10-06

Santamauro, Jon

Electronic digital logic circuitry

Interface

Current driving

326 27, 326 68, 326 88, H03K 190185, H03K 190948

Patent

active

058182586

ABSTRACT:
Integrated circuit output buffers and buffering methods are responsive to the input logic signal frequency to produce higher output voltages for lower frequency logic signals and lower output voltages for higher frequency logic signals. Stated differently, the output level is not raised when the data signal is provided at high speed so that power consumption and noise malfunctions may be reduced. An integrated circuit output buffer includes a driver circuit which is responsive to an input logic signal which is at a first input logic value, to drive an output terminal to a first output logic value. The driver circuit is responsive to the input logic signal at a second logic value which is logically complementary to the first input logic value, to drive the output terminal to a second output logic value at a first voltage level, where the second output logic value is logically complementary to the first output logic value. The integrated circuit buffer also includes a time dependent driver boosting circuit, which is responsive to the input logic signal being at the second input logic value for a predetermined time, to boost the driver circuit to drive the output terminal to the second logic value at a second voltage level which is of greater magnitude than the first voltage level.

REFERENCES:
patent: 4656373 (1987-04-01), Plus
patent: 4801826 (1989-01-01), Cornelissen
patent: 4833350 (1989-05-01), Frisch
patent: 5056062 (1991-10-01), Kuwabara et al.
patent: 5204557 (1993-04-01), Nguyen
patent: 5406140 (1995-04-01), Wert et al.
patent: 5418474 (1995-05-01), Davis et al.
patent: 5451889 (1995-09-01), Heim et al.
patent: 5502406 (1996-03-01), Traynor et al.

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