High voltage detector to control a power supply voltage pump for

Details High voltage detector to control a power supply voltage pump for High voltage detector to control a power supply voltage pump for

1999-03-26

2000-12-19

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 66, H03K 5153

Patent

active

061631752

ABSTRACT:
A high voltage detector circuit (FIG. 2) maintains a voltage (V.sub.2) on a reference line driven by a charge pump by turning the charge pump on with a signal (PUMPON) when the reference line voltage (V.sub.2) drops below a reference voltage (V.sub.1) plus a CMOS transistor threshold voltage. The high voltage detector is further configured to use transistors which have a maximum gate to drain, or gate to source voltage which exceeds the pin supply voltage to the chip. The high voltage detector includes comparators made up of a series of current mirrors driven by weak current sources enabling the circuit to use a minimum amount of power.

REFERENCES:
patent: 4749880 (1988-06-01), Kobatake
patent: 5200654 (1993-04-01), Archer
patent: 5512849 (1996-04-01), Wong
patent: 5914868 (1999-06-01), Han et al.

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