Programmable output drive circuit

Details Programmable output drive circuit Programmable output drive circuit

1991-07-16

1992-10-06

Westin, Edward P.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307270, 307475, H03K 1716, H03K 19092

Patent

active

051534509

ABSTRACT:
A programmable output driver circuit is provided having multiple drive capabilities for optimizing noise margins at different frequencies. Several signal paths are designed in parallel, each comprising a driver unit made up of a pull-down and a pull-up transistor. Some of the paths can be disabled by NAND gates slowing down the driver circuit to reduce the attendant noise at lower frequencies. Different types of parallel structures can be designed, allowing for variable rise and fall times of the output signal, as well as skewed duty cycles.

REFERENCES:
patent: 4719369 (1988-01-01), Asano
patent: 4820942 (1989-04-01), Chan
patent: 4885485 (1989-12-01), Leake et al.
patent: 4918339 (1990-04-01), Shigeo et al.
patent: 4961010 (1990-10-01), Davis

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