| 摘要 |
An oscillation circuit loop includes two phase shifters for advancing and delaying the phase of an input signal respectively, an adder for obtaining the vector sum of the output signals of these two phase shifters, and feedback means for the positive feedback of the output signal of the adder to an oscillation amplifier through a tank circuit. An external control voltage is applied to the adder so as to continuously vary the relative magnitude of the two signals added to each other by the adder. With an oscillator having such a construction, the degree of phase shift by the phase shifters and the value of Q of the tank circuit can be freely selected, and as a result, any desired sensitivity and phase control range can be freely obtained.
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