Patent ID: 7701300

Claim:
A frequency synthesizer comprising: a voltage controlled oscillator which generates a first signal; a polyphase filter which adjusts a phase of the first signal and generates a quadrature (Q) signal of the first signal; a plurality of dividers which generates a plurality of frequency divided signals based on the first signal, and Q signals of the plurality of frequency divided signals, wherein at least one of the Q signals of the plurality of frequency divided signals is generated using a corresponding one of the plurality of frequency divided signals; and a single side band (SSB) mixer which generates a frequency synthesized signal having a frequency which is a frequency synthesis of the first signal and a second signal, from the first signal and the Q signal of the first signal, and the second signal and a Q signal of the second signal, wherein the second signal and the Q signal of the second signal are selected from among the plurality of frequency divided signals and the Q signals of the plurality of frequency divided signals, wherein the plurality of dividers comprise: a first divider which divides a frequency of the first signal by two to generate a first divided signal; a second divider which divides a frequency of the first divided signal by three to generate a second divided signal and a Q signal of the second divided signal as a first set among the plurality of frequency divided signals and the Q signals of the plurality of frequency divided signals; a third divider which divides a frequency of the second divided signal by five to generate a third divided signal and a Q signal of the third divided signal as a second set among the plurality of frequency divided signals and the Q signals of the plurality of frequency divided signals; and a fourth divider which divides a frequency of the first divided signal by five to generate a fourth divided signal and a Q signal of the fourth divided signal as a third set among the plurality of divided signals and the Q signals of the plurality of divided signals.