| 摘要 |
PROBLEM TO BE SOLVED: To provide a VCO circuit which has high phase noise characteristics while broadening a variable frequency range. SOLUTION: The VCO circuit 100 is equipped with: a bias circuit 101 composed of a buffer circuit B11, a P-type MOS transistor Q11, and a capacitor C11; an amplifier A11; and a resonant circuit 102 composed of an inductor L11, a variable capacitor C12, a capacitor C13 with a switch, C14, etc. COPYRIGHT: (C)2008,JPO&INPIT
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