Backflow preventing circuit capable of preventing reverse...

Details Backflow preventing circuit capable of preventing reverse... Backflow preventing circuit capable of preventing reverse...

2006-12-07

2008-09-09

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C327S316000, C327S323000, C327S544000

Reexamination Certificate

active

07423471

ABSTRACT:
This patent specification describes a backflow prevention circuit which includes a first switch configured to conduct or to shut down a current path from an input terminal to an output terminal, a logic circuit configured to binarize an input voltage at the input terminal based on an output voltage at the output terminal and to output a binary signal and a shutdown circuit configured to cause the first switch to shut down independently of a switching control signal in accordance with the binary signal output from the logic circuit. The switching control signal performs a switching control of the first switch. The logic circuit outputs a shutdown signal to shut down independently of the switching control signal when the input voltage becomes smaller than the output voltage.

REFERENCES:
patent: 58-144234 (1983-08-01), None
patent: 10-240359 (1998-09-01), None
patent: 11-186503 (1999-07-01), None
patent: 2000-201429 (2000-07-01), None
patent: 3210567 (2000-07-01), None
patent: 2002-152968 (2002-05-01), None
patent: 2002-152978 (2002-05-01), None
patent: 3329168 (2002-07-01), None
patent: 2003-258614 (2003-09-01), None
patent: 2005-151677 (2005-06-01), None

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