High voltage detector circuit

Details High voltage detector circuit High voltage detector circuit

1997-03-31

1999-04-27

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 80, 327 77, H03K 5153

Patent

active

058983244

ABSTRACT:
For providing a high voltage detector circuit for discriminating whether a voltage supplied to an input terminal (1) is higher or not than a power supply thereof, stably independent of its power supply fluctuation or noises and without problem of gate oxide break because of high voltage; a high voltage detector circuit of the invention comprises: a MOS transistor (P1) with its gate connected to the power supply; a first resistor (R1) connected between a source of the MOS transistor and the input terminal; a second resistor (R2) connected between a drain of the MOS transistor and a ground; and an inverter for outputting inverse logic of a drain voltage of the MOS transistor to an output terminal (OUT).

REFERENCES:
patent: 4309627 (1982-01-01), Tabata
patent: 4658156 (1987-04-01), Hashimoto
patent: 5083045 (1992-01-01), Yim et al.
patent: 5170077 (1992-12-01), Schreck
patent: 5278458 (1994-01-01), Holland et al.

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