OSCILLATOR

摘要

PROBLEM TO BE SOLVED: To provide an oscillator that boots up quickly in a simple configuration and generates a signal of more stable frequency than an existing ring voltage-controlled oscillator.

SOLUTION: The oscillator includes: a ring voltage-controlled oscillator 10 whose oscillation frequency varies with a control voltage applied to a control voltage input terminal; a pulse shaping circuit 20 for converting an output signal of the ring voltage-controlled oscillator 10 to output a pulse signal of a constant time width; and an integration circuit 30 for integrating a voltage resulting from subtracting from a reference voltage an average voltage of the variable frequency pulse signal output from the pulse shaping circuit 20 and outputting the integral to the control voltage input terminal of the ring voltage-controlled oscillator 10.

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