TUNING APPARATUS USING A VOLTAGE-DEPENDENT REACTANCE ELEMENT

摘要

A TUNING APPARATUS USING A VOLTAGE-DEPENDENT REACTANCE ELEMENT A tuning apparatus using a voltage-dependent reactance element comprising a tuning circuit including a voltage-dependent reactance element as a tuning element, a voltage sweep circuit for generating a sweep tuning voltage to be applied to the voltage-dependent reactance element, an operational circuit for converting the tuning voltage to a reference voltage which linearly varies in proportion with a tuning frequency and a voltage comparator circuit for comparing an output of the operational circuit with a predetermined standard voltage, an output of the voltage comparator circuit being used to control the sweep of the voltage sweep circuit to produce a predetermined tuning frequency.