Phase compensated controlled oscillator

Details Phase compensated controlled oscillator Phase compensated controlled oscillator

H - Electricity

04

N

331/46, 350/57

H04N 9/455 (2006.01)

Patent

CA 1142640

RCA 72,790 Abstract of the Disclosure A controlled oscillator comprises an amplifier including an active device, a filter network arranged in a feedback loop of the amplifier for providing regenerative feedback to sustain oscillation of the amplifier, and a source of control signals. Output oscillatory signals from the amplifier and output control signals from the control source are summed by a combining network to produce a resultant controlled signal, which is coupled to the filter network. Parasitic capacitances associated with output terminals of the amplifier and control source impart an unwanted phase shift to the controlled signal. A compensation signal derived from the oscillator is supplied to the combining network with a magnitude and phase to offset the unwanted phase shift, to thereby produce a phase compensated resultant controlled signal.

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