Patent ID: 7305218

Claim:
An RF switch comprising: a relay switch for selecting an RF signal inputted from an external source; an amplifier for amplifying the RF signal outputted from the relay switch to a predetermined level; and an amplifier power controller for turning on/off power of the amplifier, wherein the amplifier power controller further comprises a trigger unit for generating a control signal for turning on the amplifier if the output voltage of the RF AGC of the tuner is greater than a pre-set upper limit threshold value, and generating a control signal for turning off the amplifier if the output voltage of the RF AGC of the tuner is smaller than a pre-set lower limit threshold value; and a power adjusting unit for turning on or off the amplifier on the basis of the control signal of the trigger unit, and wherein a reaction speed of the power adjusting unit is slower than a reaction speed of the RF AGC of the tuner.