Patent ID: 7019596

Claim:
A high-frequency oscillator, comprising: a crystal oscillation unit producing a distorted oscillation output having a plurality of frequency components by making a center voltage of the distorted oscillation output higher than a center voltage of a power source voltage; a first filter unit allowing only a first of said frequency components to pass through said first filter unit, the first frequency component being one of a plurality of the frequency components in a frequency spectrum of the oscillation output; a second filter unit allowing only a second of said frequency components to pass through said second filter unit, the second frequency component being one of a plurality of the frequency components in the frequency spectrum of the oscillation output; and a multiplexer unit selecting a signal which passes through one of said first filter unit and said second filter unit, wherein the signal is an output of the high-frequency oscillator, wherein said first filter unit is a monolithic crystal filter, and said second filter unit is a surface acoustic wave filter.