| 摘要 |
A voltage controlled oscillator comprises a tank circuit for determining an oscillation frequency, a first circuit for delaying the signal having the oscillation frequency, a second circuit for advancing the signal having the oscillation frequency, the first and second circuit being connected in series, a third circuit interposed between the tank circuit and the series connection of the first and second circuits, the third circuit having the same equivalent circuit of the series connection, a first gain controlled amplifier amplifying the output from the first circuit, a second gain controlled amplifier amplifying the output from the second circuit, an adder for adding outputs from the first and second gain controlled amplifiers, a control circuit controlling the gains of the first and second gain controlled amplifiers, and a feed-back circuit for feeding the output of the adder to the tank circuit. |
