Patent ID: 7804370
Filing Date: 2010-09-28
Classification: H03L

Abstract:
1. A frequency generator comprising: an oscillator configured to generate an oscillation frequency signal; a mixer unit having an input terminal, a feedback terminal, and an output terminal and being configured to output a frequency signal through the output terminal, the frequency signal obtained by adding or subtracting frequency of a feedback signal, input through the feedback terminal, to or from frequency of the oscillation frequency signal input through the input terminal from the oscillator; a first frequency divider configured to divide the frequency signal output from the mixer unit at a division ratio of N (N is a multiple of 2) to generate an output signal; and a feedback circuit configured to adjust the output signal of the first frequency divider for the first frequency divider to output a frequency signal in a desired band and to feed back the adjusted signal to the feedback terminal of the mixer unit; wherein the first frequency divider has a division ratio of 2, and the feedback circuit is configured so that the output signal of the first frequency divider is output as a frequency signal divided into first to fourth domains, wherein the feedback circuit comprises: a second frequency divider configured to divide the output signal of the first frequency divider at a division ratio of M (M is a multiple of 2) to generate an output signal; and a multiplexer configured to receive the output signal of the first frequency divider and the output signal of the second frequency divider and to adjust the signals fed back into the mixer unit.