Patent ID: 7457599
Filing Date: 2008-11-25
Classification: G01S,H03L

Abstract:
1. A frequency transceiver for transmitting an RF (radio frequency) signal oscillated from an RF oscillator to an exterior to convert an external RF signal into an IF (intermediate frequency) signal, the frequency transceiver comprising: a local oscillator for oscillating a VHF (very high frequency) signal proportional to a VHF oscillation control voltage inputted; a first IF processor for mixing an external RF signal with the VHF signal oscillated by the local oscillator to convert the external RF signal into a first IF signal proportional to the VHF signal; a second IF processor for mixing the RF signal oscillated by the RF oscillator with the VHF signal oscillated by the local oscillator to convert the RF signal into a second IF signal proportional to the VHF signal, and converting the second IF signal into an output voltage; a control signal generator for generating a control signal which controls VHF signal oscillation of the local oscillator according to the output voltage of the second IF processor, the control signal generator comprising: a VHF oscillation controller for outputting the VHF oscillation control voltage to the local oscillator according to the driving control signal and the counting control signal.