| 摘要 |
<p>A voltage controlled oscillator, a VCO (100, 300, 400, 500, 600, 700) comprising a resonator (105, 305, 605, 706) connected to an amplifier (110, 310, 610, 710) so that signals from the resonator can pass through the amplifier and be returned to the resonator. The VCO also comprises a tuning circuit (115, 315, 615, 715) for tuneably altering the amplitude of a signal which is input to the tuning circuit. The tuning circuit is connected to a first point (A) in the VCO for accessing a signal and to a second point (B) in the VCO for re-injecting said signal altered in amplitude. The accessed and reinjected signal is given a phase shift which is greater or smaller than the phase shift of a signal which is returned to the resonator after having passed through the amplifier.</p> |
