Patent ID: 7050780
Filing Date: 2006-05-23
Classification: H04B

Abstract:
1. An RF transceiver for AMPS communication comprising: a baseband processor for generating a transmission intermediate frequency signal and processing a reception intermediate frequency (IF) signal; a local oscillator for generating a local oscillation signal in transmission and reception; an up-mixer for combining the transmission IF signal with the local frequency signal; a duplexer for processing a radio frequency signal received through an antenna; and specific frequency removing means installed between the local oscillator and the up-mixer to remove a specific frequency signal generated from the local oscillator, wherein the specific frequency removing means comprises a pin diode for removing the specific frequency using a signal generated from the local oscillator a resonator installed between a line connecting the local oscillator and the up-mixer and a ground; a pin diode of which anode is connected to the resonator and a cathode is grounded: and a switch for connecting the anode of the pin diode and a positive terminal of a power source so as to selectively operate the resonator.