Voltage comparator circuit

Details Voltage comparator circuit Voltage comparator circuit

1998-09-29

2000-11-14

Wambach, Margaret R.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

66 67, 66 69, 66 70, 66 71, 66 72, H03K 522

Patent

active

061475173

ABSTRACT:
Control circuit for providing the greater of a supply voltage V.sub.CC and a battery voltage V.sub.BATT. A comparator compares V.sub.CC and V.sub.BATT, and provides output signals to an inverting gain stage. A switch receives output signals from the inverting gain stage and provides the greater of V.sub.CC and V.sub.BATT as the circuit output and as the comparator supply voltage. The circuit output voltage rapidly switches between V.sub.CC and V.sub.BATT as the comparison status of the two voltages changes.

REFERENCES:
patent: 5065045 (1991-11-01), Mok
patent: 5315171 (1994-05-01), Blauer
patent: 5525920 (1996-06-01), Rakers

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