Patent ID: 8929502
Filing Date: 2015-01-06
Classification: H03K,H03L,H04L

Abstract:
1. A high-frequency signal processing device, comprising: a digital phase comparator unit inputting a feedback oscillation signal and a reference oscillation signal having a reference frequency, detecting a phase difference between the reference oscillation signal and the feedback oscillation signal, and also outputting a first digital signal representing the phase difference; a digital filter unit performing averaging processing on the first digital signal in synchronization with a first clock signal and outputting the processing result as a second digital signal; a digital control oscillator unit including an inductance element and plural capacitance elements each coupled to an oscillator node and outputting a carrier oscillation signal at the oscillator node by coupling the capacitance elements selectively to the oscillator node based on frequency setting information expressed by the second digital signal; a frequency divider unit outputting the feedback oscillation signal and the first clock signal by dividing the carrier oscillation signal; and a setting unit selecting a first clock frequency of the first clock signal from a plurality of options based on frequency band information of a standard to be used and controlling a frequency dividing ratio to be used in the frequency divider unit, based on the selected first clock frequency and a carrier frequency to be set among frequency bands of the standard.