Detection of a closed loop voltage

Details Detection of a closed loop voltage Detection of a closed loop voltage

2006-09-05

2006-09-05

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S078000

Reexamination Certificate

active

07102393

ABSTRACT:
To detect whether a closed-loop's voltage is out of range, a voltage detector includes first and second transistors that deliver first and second currents respectively to first and second high impedance nodes. The voltage detector further includes third and fourth transistors that draw third and fourth currents respectively from the first and second nodes. The first and second currents are scaled replicas of a current flowing through a current source of a voltage-to-current converter that converts the close-loop's voltage to a current and supplies a first voltage to the first and second transistors. The third and fourth currents are scaled replicas of a different current flowing through a current mirror of the voltage-to-current converter and that supplies a second voltage to the third and fourth transistors.

REFERENCES:
patent: 5543746 (1996-08-01), Kuo
patent: 5598094 (1997-01-01), Kiehl et al.
patent: 6297685 (2001-10-01), Ewen et al.
patent: 6339318 (2002-01-01), Tanaka
patent: 6831501 (2004-12-01), Aude

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