Unbalanced dc voltage detecting circuit

Details Unbalanced dc voltage detecting circuit Unbalanced dc voltage detecting circuit

G - Physics

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G01R 19/10 (2006.01) H03F 1/00 (2006.01) H03F 1/52 (2006.01) H03F 3/30 (2006.01)

Patent

CA 1099342

S P E C I F I C A T I O N T I T L E UNBALANCED DC VOLTAGE DETECTING CIRCUIT ABSTRACT OF THE DISCLOSURE An unbalanced DC voltage detecting circuit which includes first and second switching transistors with one connected to the output terminal of a power amplifier through a low pass filter and the other connected to the output terminal through a DC level shifting device and the low pass filter with the outputs of the first and second transistors connected to a third switching trans- istor which controls current to a relay such that when said third transistor is turned off, the relay is deenergized to open a circuit to a load. The first and second transistors are controlled by unbalanced DC voltage which exceeds predetermined levels. A second embodiment includes temperature control to prevent overheating. -1-

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