| 摘要 |
<p>A controlled oscillator used in a stereo decoder for synchronizing the oscillatory output to a pilot signal. The oscillator includes a differential, first amplifier (50) and a second amplifier (51a), a resonator (124a) responsive to the combined outputs of the amplifiers, reactive means (C1) coupled to receive the oscillatory signal from the resonator for providing a phase shift to one of the amplifiers and means responsive to said pilot signal and said oscillatory signal for generating a control signal (123a) to vary the amplitude of one of the amplifiers.</p> |
