Logic circuit

Details Logic circuit Logic circuit

1977-12-05

1980-10-14

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307254, 307270, 307300, 307310, 357 15, H03K 1700

Patent

active

042283710

ABSTRACT:
A logic circuit in which a phase splitting transistor is connected at its emitter to the base of an output pull-down transistor having a bypass network connected between its base and emitter. The bypass network, comprised of a resistor in series with a Schottky diode, enables the phase splitting transistor to be turned on and off prior to the corresponding turn-on and turn-off of the pull-down transistor, provides a path for discharging the base of the pull-down transistor and for passing its collector-to-base leakage, and compensates for temperature variations of the pull-down transistor to maintain the propagation delay of the logic circuit relatively constant over a wide temperature range.

REFERENCES:
patent: 3751680 (1973-08-01), Hodges
patent: 3836789 (1974-09-01), Struk et al.
IBM Tech. Dsclre. Blltn., True Complement Generator Circuit with Schottky Barrier Diodes, by S. J. Park, vol. 16, No. 4, 9/73, p. 1280.
Schottky Diode has 0.5-volt drop at 50 amps, Electronics, 1/5/70, pp. 180-182.

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