| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a voltage-controlled oscillation circuit which reduces phase noise by improving linearity of changes in capacitance value of a variable capacitance with respect to a control voltage. Ž<P>SOLUTION: The voltage-controlled oscillation circuit outputs oscillation signals OUT, OUTX each in which an oscillation frequency varies according to a control voltage. The circuit includes: a plurality of variable capacitances VAC1-VAC4 each in which a capacitance value varies according to an applied voltage; and divided-voltage generating parts R1-R4 that divide the control voltage so as to generate divided voltages VT, VT1-VT3 to be applied to the plurality of variable capacitances. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
