<p>A variable frequency oscillator comprises an oscillating loop and a variable phase shifter for imparting one of two different phase shifts depending upon the polarities of a DC control voltage to a signal from the oscillating loop. The phase-shifted signal has its amplitude controlled by the amplitude of the control voltage and is combined with the signal in the oscillating loop. The vector sum of the combined signals determined the phase angle of the oscillator signal and hence the frequency thereof.</p>
申请公布号
CA1061871(A)
申请公布日期
1979.09.04
申请号
CA19760264742
申请日期
1976.10.29
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;VICTOR COMPANY OF JAPAN, LIMITED