Voltage detection circuit

Details Voltage detection circuit Voltage detection circuit

2006-05-16

2006-05-16

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S198000, C327S513000

Reexamination Certificate

active

07046055

ABSTRACT:
A voltage detection circuit for detecting the voltage level of a first power source. A first transistor includes a first gate, a first source, and a first drain coupled to the first gate. A second transistor includes a second gate, a second source, and a second drain coupled to the second gate. A comparator includes a first input terminal, a second input terminal coupled to the second drain, and an output terminal. A first resistor is coupled between the first input terminal and the first drain. A second resistor is coupled to the first power source. A third resistor is coupled between the second resistor and the first input terminal. A fourth resistor is coupled between the second resistor and input terminal. A fifth resistor is coupled between the first source, and a second power source. A resistive device is coupled between the first source, and the first power source.

REFERENCES:
patent: 5336943 (1994-08-01), Kelly et al.
patent: 6429700 (2002-08-01), Yang
patent: 6559629 (2003-05-01), Fernald
patent: 6765431 (2004-07-01), Coady
patent: 6906590 (2005-06-01), Amano
patent: 2004/0080305 (2004-04-01), Lin et al.

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