Noise resistant low voltage brownout detector with shut off opti

Details Noise resistant low voltage brownout detector with shut off opti Noise resistant low voltage brownout detector with shut off opti

1991-05-03

1993-02-16

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

3072961, 3072723, 307354, 307363, H03K 5153, H03K 1700

Patent

active

051873893

ABSTRACT:
An integrated circuit which will produce a switched output when the circuit power supply drops a predetermined level below which reliable IC operation is not assured. This reduced power supply condition is referred to as brownout wherein the switching is related to the active devices. A preferred CMOS circuit is disclosed. The switching level is related to the N channel and P channel transistor sum of thresholds which makes the CMOS circuit process adaptive. The circuit is provided with a transistor gate oxide capacitor for improving noise immunity while achieving maximum utilization of IC chip area. In addition, output enable and circuit shutdown capabilities are detailed.

REFERENCES:
patent: 4888498 (1989-12-01), Kadakia
patent: 4902910 (1990-02-01), Hsieh
patent: 4948995 (1990-08-01), Takahashi
patent: 4983857 (1991-01-01), Steele
patent: 5027006 (1991-06-01), Queinnec et al.

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