Common bus driver complementary protect circuit

Details Common bus driver complementary protect circuit Common bus driver complementary protect circuit

1974-09-18

1976-02-10

Miller, J. D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

317 33R, 317 33SC, 307202R, H02H 308, H02H 720

Patent

active

039380084

ABSTRACT:
An over current protect circuit for a common bus driver having a complementary pair FET output includes a pair of AND circuits responsive to the gate-source and drain-source voltages for charging separate time integrating capacitors. If a threshold charge is reached a latch is triggered, which in turn disables the driver via a NAND gate and Inverter, and discharges the active capacitor. The latch is reset by dropping the driver enable line. As an alternative, high driver current may be sensed by placing a resistor in series with each output FET and charging the associated capacitor in response to a high current through the resistor.

REFERENCES:
patent: 3555358 (1971-01-01), Gibbs
patent: 3681659 (1972-08-01), Suzuki
patent: 3691427 (1972-09-01), Honda et al.
patent: 3814988 (1974-06-01), Ito
patent: 3859560 (1975-01-01), Peters
"Self-limiting Off-chip Driver", by J. C. Elliott and S. D. Malaviya, I.B.M. Tech. Disc., Vol. 16, No. 8, 1/74.

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