Title:
可変容量コンデンサ
Document Type and Number:
Japanese Patent JP5619998
Kind Code:
B2
Abstract:
To provide a variable capacitor capable of being driven at a low voltage and yielding a stable capacitance while reducing ripple. The variable capacitor includes a plurality of variable capacitor elements connected in parallel with one another, the variable capacitor elements each including a fixed electrode and a movable electrode facing each other, a beam supporting the movable electrode displaceably, and a drive electrode supplied with a drive voltage to change spacing between the fixed electrode and the movable electrode. The variable capacitor further includes drive control means for sequentially applying an AC drive voltage to the drive electrodes of the variable capacitor elements with a predetermined phase difference for each element. The sum of capacitances of the variable capacitor elements is an output capacitance.
Inventors:
村田 眞司
Application Number:
JP2013517892A
Publication Date:
November 05, 2014
Filing Date:
February 13, 2012
Export Citation:
Assignee:
アルプス電気株式会社
International Classes:
H01G5/38; H01G5/16
Domestic Patent References:
| JP2008117913A | 2008-05-22 | |||
| JP2002340989A | 2002-11-27 | |||
| JP2011108989A | 2011-06-02 |
Attorney, Agent or Firm:
Kunio Miura