CONTROL CIRCUIT, RESONANCE CIRCUIT, ELECTRONIC DEVICE, CONTROL METHOD, CONTROL PROGRAM, AND SEMICONDUCTOR ELEMENT

摘要

A control circuit, resonant circuit, electronic device, control method, control program, and a semiconductor element, which enable a circuit to be measured and tuned within a short time even in consideration of a time constant when a control voltage is applied to a variable capacitance capacitor. A control circuit for a variable capacitance capacitor includes: a digital-analog converter that outputs a control voltage consisting of a variable DC voltage; the variable capacitance capacitor that has a capacitance varying with an application of the control voltage; a phase detector that acquires a characteristic of a circuit containing the variable capacitance capacitor; an analog-digital converter that subjects an analog signal from the phase detector to a digital conversion; a comparing section that compares a target value with a detected value; and a control section that sets the control voltage for the digital-analog converter on the basis of the comparison result.

主权项

1. A control circuit for a variable capacitance element, comprising:
a control voltage output section outputting a control voltage consisting of a variable DC voltage; a variable capacitance element having a capacitance varying with an application of the control voltage; and a detection section acquiring a characteristic of a circuit containing the variable capacitance element, wherein the detection section having a wait time between when the control voltage is applied to the variable capacitance element and when a measurement of the characteristic of the circuit is acquired, and the wait time being set to a plurality of values in accordance with the control voltage.