Integrated circuit with power supply voltage level detection

Details Integrated circuit with power supply voltage level detection Integrated circuit with power supply voltage level detection

1977-08-18

1979-02-27

Mullins, James B.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

328147, H03K 300

Patent

active

041421183

ABSTRACT:
An MOS integrated circuit includes internal circuitry for detecting the voltage level of an external power supply. The internal circuitry comprises networks for producing two reference voltages, each of which varies with supply voltage in a different but predictable manner such that when the reference voltages are equal, the supply voltage is at a sufficiently high level to assure the generation of valid logic levels. As the supply voltage increases beyond such level, the two reference voltages diverge in value, detection of which is achieved with a different amplifier. Circuitry responsive to the output of the differential amplifier gives a positive indication of sufficient supply voltage to other circuit portions of the integrated circuit device.

REFERENCES:
patent: 3105939 (1963-10-01), Onno et al.
patent: 3676783 (1972-07-01), Kinbara et al.
patent: 3733498 (1973-05-01), Watson
patent: 3894247 (1975-07-01), De Jong
patent: 3975648 (1976-08-01), Tobey, Jr. et al.

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