| 摘要 |
In a phase locking oscillator servosystem, the phase of a voltage controlled oscillator (VCO) is determined by a stored control voltage representative of phase error. Positive and negative constant current sources are switched to an integrator, which provides the control voltage, at times determined by a reference input signal and the fed back VCO output. The current sources are switched simultaneously to or away from the integrator in response to a predetermined condition and are switched individually away from or to the integrator in response to respective input and output signals. The conditions for switching are such that a sufficient time interval for switching circuit operation is established between said individual and simultaneous switchings.
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