FREQUENCY SYNTHESIZER AND MOBILE TERMINAL

摘要

PROBLEM TO BE SOLVED: To suppress generation of spurious spectrum while shortening the setting time and reducing the phase noise through small size low cost design.

SOLUTION: The frequency synthesizer comprises a first frequency synthesizer subunit for converting a reference frequency signal into a signal in a first kind of frequency band, a second frequency synthesizer subunit for converting the reference frequency signal into a signal in a second kind of frequency band and an intermediate frequency signal, and a third frequency synthesizer subunit for converting the reference frequency signal into an auxiliary signal having a fixed frequency being used along with the intermediate frequency signal for generating signals in third and fourth kinds of frequency band.

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