Tri-state output buffer circuit including a capacitor and dynami

Details Tri-state output buffer circuit including a capacitor and dynami Tri-state output buffer circuit including a capacitor and dynami

1981-07-27

1988-09-20

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307482, 307578, 307270, H03K 19017, H03K 19094, H03K 458, H03K 1710

Patent

active

047728124

ABSTRACT:
A tri-state output buffer is provided which incorporates a dynamic depletion mode circuit. The tri-state buffer has an output driver circuit which includes a pull-up and a pull-down transistor device. Rapid switching of the pull-up transistor from a nonconducting state to a conducting state is accomplished with a bootstrap circuit. The bootstrap circuit includes a capacitor and a dynamic depletion mode switching device. The dynamic depletion mode device acts to rapidly transfer the charge from the capacitor to the gate of the pull-up transistor. Additionally an invertor or voltage driver, connected between the bootstrap circuit dynamic depletion mode switching device and the capacitor provides a voltage jump across said capacitor to further increase the switching speed of the pull-up transistor.

REFERENCES:
patent: 4217502 (1980-08-01), Suzuki et al.
patent: 4280065 (1981-07-01), Minato et al.
patent: 4291242 (1981-09-01), Schriber
patent: 4329600 (1982-05-01), Stewart
Knepper, "Dynamic Depletion Mode: An E/D MOSFET Circuit Method for Improved Performance", IEEE Journal of Solid State Circuits, vol. SC-13, No. 5, Oct. 1978, pp. 542-548.

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