Voltage detecting circuit

Details Voltage detecting circuit Voltage detecting circuit

2008-07-08

2008-07-08

Nguyen, Ha Tran (Department: 2829)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

Reexamination Certificate

active

11518793

ABSTRACT:
A power supply voltage detecting circuit includes a voltage regulating circuit, a comparative circuit, a timer circuit, and a display circuit. The voltage regulating circuit provides a stable reference voltage to the comparative circuit. The comparative circuit compares the reference voltage with the voltage from the power supply. The comparative circuit is electrically connected to the display circuit via the timer circuit. The display circuit includes light emitting diodes for revealing a status of the voltage from the power supply. The timer circuit causes the display circuit to keep a light on when there has been an occurrence of abnormal voltage from the power supply until an operator resets it.

REFERENCES:
patent: 4618857 (1986-10-01), Dubois et al.
patent: 4879625 (1989-11-01), Potenzone
patent: 4983955 (1991-01-01), Ham et al.
patent: 6944003 (2005-09-01), Sugimoto et al.
patent: 6972703 (2005-12-01), Yen et al.
patent: 6980449 (2005-12-01), Chang

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