RF switch

Details RF switch RF switch

2007-12-04

2007-12-04

Nguyen, Duc M. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S239100, C455S250100, C455S242100

Reexamination Certificate

active

10746731

ABSTRACT:
An RF switch is disclosed. Power of an amplifier installed in an RF switch of a TV receiver is adjusted by using a Schmitt trigger circuit. If an output voltage of an RF automatic gain controller of a tuner is greater than a pre-set upper limit threshold value, the amplifier is turned on, whereas if an output voltage of an RF automatic gain controller of a tuner is smaller than a pre-set lower limit threshold value, the amplifier is turned off. Thus, a signal distortion phenomenon that may occur when an infinitesimal signal, a strong signal and several signals with high power levels are adjacent to each other can be avoided, so a performance of a receiving unit is improved.

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