Dsack clamp

Details Dsack clamp Dsack clamp

1991-03-15

1994-05-03

Shaw, Dale M.

395550, G06F 1502

Patent

active

053095650

ABSTRACT:
A circuit for use in a peripheral interface unit of a microprocessor-based system that actively drives a tri-state data strobe acknowledge (DSACK*) signal to a logical low state after a delay following assertion of an address strobe by the microprocessor. The DSACK* signal is then actively driven to a logical high state in response to deassertion of the address strobe. The DSACK* signal is then returned to a high impedance state. A Schmitt trigger feedback circuit guarantees that the resulting digital "high" level in the high impedance state will exceed a defined, minimum voltage level, regardless of the circuit's capacitance load.

REFERENCES:
patent: 4308959 (1982-01-01), Hoover et al.
patent: 4554411 (1985-11-01), Armstrong

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