Television tuner in which power is supplied to external...

Details Television tuner in which power is supplied to external... Television tuner in which power is supplied to external...

2007-09-04

2007-09-04

Hsia, Sherrie (Department: 2622)

Television

Receiver circuitry

Power supply

C348S731000

Reexamination Certificate

active

10924229

ABSTRACT:
A television tuner comprises a connector2to which a television signal is input, a high frequency circuit5for frequency-converting the television signal into an intermediate frequency signal and outputting the intermediate frequency signal, and a power supply terminal10for supplying a power supply voltage to the high frequency circuit. And a power switch circuit12for supplying the power supply voltage to the connector is provided between the connector and the power supply terminal. Accordingly, by turning on/off the power switch circuit, the power supply voltage is supplied to the external circuit connected to the connector, and, when the power supply is stopped, the semiconductor device can be prevented from being damaged due to application of the over-voltage from the exterior to the connector.

REFERENCES:
patent: 6765626 (2004-07-01), Tanaka
patent: 7030939 (2006-04-01), Yamamoto
patent: 7129994 (2006-10-01), Sasaki et al.
patent: 2003/0202126 (2003-10-01), Sasaki
patent: H06-028866 (1994-08-01), None

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