Programmable output driver for integrated circuits

Details Programmable output driver for integrated circuits Programmable output driver for integrated circuits

1991-04-08

1992-10-20

LaRoche, Eugene R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307445, 307449, H03K 1716

Patent

active

051572826

ABSTRACT:
The present invention minimizes the noise voltage associated with the switching of output driver transistors of integrated cicruits caused by the rapid change in value of the current, expressed by the term di/dt, from the load into the driver transistors through the package leads. The present invention uses a programmable coarse current control (CCC) circuit and a programmable fine current control (FCC) circuit that control the pull-down output transistors. The FCC creates two time periods, after which it prevents the CCC from controlling an output pull-down transistor. The FCC and the CCC are used to reduce the di/dt dependent voltage noise by controlling the slope and the shape of the output voltage pull-down characteristics.

REFERENCES:
patent: 4758743 (1988-07-01), Dehganpour et al.
patent: 4948991 (1990-08-01), Schucker et al.
patent: 5045722 (1991-09-01), Yang et al.
patent: 5051625 (1991-09-01), Ikeda et al.
Sweha, S., et al., "A 29ns 8Mb EPROM with Dual Reference-Column ATD Sensing" IEEE International Solid-State Circuits Conference Digest of Technical Papers, pp. 264-265, Feb. 15, 1991.

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