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Abstract

A mixed-signal-controlled phase-locked loop is provided. This loop includes a mixed-signal-controlled oscillator circuit for generating an oscillating signal having an oscillating frequency and a phase in response to a digital control signal and an analog control signal, a phase-frequency detector circuit electrically connected to the mixed-signal-controlled oscillator circuit, detecting the phase and the oscillating frequency of the oscillating signal and comparing the phase and the oscillating frequency with those of a reference signal to generate an error signal after the phase and oscillating frequency are detected, and a mixed-control-signal-producing circuit electrically connected to the mixed-signal-controlled oscillator circuit and the phase-frequency detector circuit for receiving the error signal to output the analog control signal and the digital control signal to the mixed-signal-controlled oscillator circuit.

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First Claim