Drive circuit for output pull-down transistor

Details Drive circuit for output pull-down transistor Drive circuit for output pull-down transistor

1984-03-05

1986-05-27

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307443, 307473, H03K 19013, H03K 19088

Patent

active

045917418

ABSTRACT:
A circuit for clamping the base of an output pull-down transistor includes a clamp transistor connecting the base of the pull-down transistor to a ground node and a drive circuit for rapidly turning on the clamp transistor in response to a high-to-low transition on an input node. The drive circuit includes a string of Schottky diodes connecting the base of the clamp transistor to the collector of a transistor whose base is responsive to the voltage on the input node.

REFERENCES:
patent: 4131808 (1978-12-01), Kuo
patent: 4287433 (1981-09-01), Goodspeed
patent: 4311927 (1982-01-01), Ferris
patent: 4321490 (1982-03-01), Bechdolt
patent: 4330723 (1982-05-01), Griffith
patent: 4339676 (1982-07-01), Ramsey
patent: 4449063 (1984-05-01), Ohmichi et al.

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