Title:
CAPACITIVE TRANSDUCER, AND DRIVING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2014236841
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a device capable of reducing noise without reducing an arrangement density of electric elements in a capacitive transducer.SOLUTION: In a capacitive transducer, a pair of or more elements in electric elements 104a, 104b, 105a and 105b apply bias voltages 102 and 103 of which the polarities are inverse to each other with a reference potential 101 interposed therebetween, between electrodes of one and the other of paired elements. Signals from elements caused by acoustic waves are obtained by calculating a differential between an output signal of one of paired electric elements and an output signal of the other of paired electric elements.
Inventors:
SOEDA YASUHIRO
Application Number:
JP2013120668A
Publication Date:
December 18, 2014
Filing Date:
June 07, 2013
Export Citation:
Assignee:
CANON KK
International Classes:
A61B8/00; G01N29/24; H01L29/84; H04R19/00
Attorney, Agent or Firm:
Kazuo Kato