The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 2018
Filed:
Jun. 24, 2014
Dexerials Corporation, Tokyo, JP;
Masayoshi Kanno, Tochigi, JP;
DEXERIALS CORPORATION, Tokyo, JP;
Abstract
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.