Patent ID: 7825702
Filing Date: 2010-11-02
Classification: H03J,H03L

Abstract:
1. A synthesizer module comprising: a reference clock oscillation circuit configured to generate a reference clock; a voltage controlled oscillator; an amplifier which amplifies an output from the voltage controlled oscillator; a control section configured to generate a signal of a frequency set based on the reference clock, compare a phase of the generated signal of the set frequency with that of a signal input from the voltage controlled oscillator, and output a phase difference signal as a voltage value to the voltage controlled oscillator; a switch configured to set a channel number; and a central processing unit configured to output information on a frequency to be set to the control section, wherein the synthesizer module further comprises: a memory configured to store a plurality of frequency modes and frequency calculation formulae corresponding thereto and a frequency mode selected from outside, and wherein the central processing unit reads the selected frequency mode stored in the memory and a frequency calculation formula corresponding to the frequency mode, to calculate a value of the frequency corresponding to the channel number set by the switch based on the frequency calculation formula, and outputs the value to the control section.