Output circuit for semiconductor integrated circuits having cont

Details Output circuit for semiconductor integrated circuits having cont Output circuit for semiconductor integrated circuits having cont

1991-06-05

1993-02-09

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307263, 307264, 307356, 307359, 307493, 307494, H03K 301, H03K 512

Patent

active

051855380

ABSTRACT:
An output circuit is disclosed for a semiconductor integrated circuit, having a controllable load drive capability. In a training mode for setting a load drive capability, a comparator compares the output signal generated from a driver circuit with the externally designated reference voltage. The control circuit controls the load drive capability of the driver circuit in response to the result of the comparison. The load drive capability of driver circuit 2 is set to a desired value by repeating the processing for these comparison and control. Accordingly, by externally controlling the level of the reference voltage, an output buffer can be obtained which is capable of setting the load drive capability to any value.

REFERENCES:
patent: 4882506 (1989-11-01), Johansson et al.
patent: 5027004 (1991-06-01), Palara
patent: 5039874 (1991-08-01), Anderson
patent: 5081379 (1992-01-01), Korteling
IBM Tech. Disc. Bul. vol. 24 No. 7A Dec. 1981 "Programmable Bipolar Driver" Parry.
IEEE 1988 Custom Integrated Circuits Conference, Leung et al., "Controlled Slew Rate Output Buffer", pp. 5.5.1-5.5.4.

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