Integrated circuit for use with variable voltages

Details Integrated circuit for use with variable voltages Integrated circuit for use with variable voltages

1977-02-17

1978-08-01

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307303, 357 51, H03K 520, H03K 1940

Patent

active

041045467

ABSTRACT:
To reliably ensure response of integrated circuits having threshold inputs, while rejecting interference and noise pulses, the input stage is formed with a plurality of resistors which can be selectively vaporized or burned off to match the input response of the threshold circuit to any input operating voltage without requiring the use of discrete, replaceable input resistors. Preferably, the input voltages are conducted to voltage dividers which have resistors which can be selectively removed by evaporation or burning off. The circuit can also have inverters bridged by a vaporizable shunt to respond to voltages of selected polarity or provide an output of selected polarity.

REFERENCES:
patent: 3761787 (1973-09-01), Davis et al.
patent: 3930304 (1976-01-01), Keller et al.

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