Circuit for cutting-off output signal

Details Circuit for cutting-off output signal Circuit for cutting-off output signal

2007-11-13

2007-11-13

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S078000, C327S081000

Reexamination Certificate

active

11296464

ABSTRACT:
An output signal cutting-off circuit includes a first switching element, a driving circuit and a voltage-drop-signal generating circuit. When a voltage to be monitored becomes lower than a threshold voltage, a voltage-drop-signal is generated and supplied to the driving circuit. The driving circuit turns on the first switching element based on the voltage-drop-signal to thereby cut off an output signal voltage by bringing it to a ground potential. When the voltage-drop-signal disappears, the first switching element is turned off to bring the output signal to a normal state. Preferably, a second switching element for charging a capacitor and a third switching element for discharging the capacitor are used in the driving circuit. In this case, the first switching element is turned on or off based on a voltage of the capacitor.

REFERENCES:
patent: 5245526 (1993-09-01), Balakrishnan et al.
patent: 5396117 (1995-03-01), Housen et al.
patent: 5467242 (1995-11-01), Kiraly
patent: 5831466 (1998-11-01), Pulvirenti et al.
patent: 7046013 (2006-05-01), Uematsu et al.
patent: 7084675 (2006-08-01), Lim
patent: 2003/0197513 (2003-10-01), Uematsu et al.

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