| 摘要 |
A variable frequency oscillator comprises a voltage controlled oscillator including a variable capacitance diode, a control voltage applied to the diode, by which the output frequency of the voltage controlled oscillator is controlled, a control voltage power supply generating the control voltage, and an impedance conversion means for decreasing the output impedance of the control voltage power supply, provided between the voltage controlled oscillator and the control voltage power supply. Therefore, a current having high current driving ability is applied to the voltage controlled oscillator, whereby the self-detecting voltage can be suppressed while the oscillation output of the circuit is increased. As a result, a variable frequency oscillator having an improved linearity of oscillation frequency can be obtained. <IMAGE> |
