Voltage detection circuit

Details Voltage detection circuit Voltage detection circuit

1978-03-14

1982-03-30

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307358, 307363, 307296R, H03K 5153

Patent

active

043226396

ABSTRACT:
A voltage detection circuit adapted for use in an electronic timepiece in which a source voltage from a battery power source, etc. is voltage-divided and applied to an input of a logic circuit including complementary MIS FETs so as to compare the divided source voltage with a reference potential level and to detect whether the source voltage is above a predetermined value or not. In the logic circuit, the logic threshold is set in the neighborhood of the threshold voltage of one MIS FET to establish a reference potential level. Advantages are provided in integrating the circuit in a semiconductor integrated circuit such that parameters relevant to the manufacturing processes do not influence the reference potential level very much and the dispersion in the detected voltage due to the fluctuations in the manufacturing processes are minimized.

REFERENCES:
patent: 3628070 (1971-12-01), Heuner et al.
patent: 3922569 (1975-11-01), Nabetani et al.
patent: 3949545 (1976-04-01), Chihara

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