Power-supply voltage detection circuit and integrated...

Details Power-supply voltage detection circuit and integrated... Power-supply voltage detection circuit and integrated...

2006-09-05

2006-09-05

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S541000

Reexamination Certificate

active

07102395

ABSTRACT:
The power-supply voltage detection circuit to detect that an external power-supply voltage and/or an internal power-supply voltage generated from the external power-supply voltage goes out of predetermined regulation comprises a first comparator for detecting the internal power-supply voltage being equal to or less than a predetermined value, a second comparator for detecting the internal power-supply voltage being greater than a predetermined value, a first capacitor for AC-coupling one of the input terminals of the first comparator to the external power-supply voltage, and a second capacitor for AC-coupling one of the input terminals of the second comparator to the external power-supply voltage.

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