Title:
CONTROL CIRCUIT, CONTROL DEVICE AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/002117
Kind Code:
A1
Abstract:
This control circuit comprises: a voltage output circuit control unit that, when a first control signal is at a first level, controls a voltage output circuit such that a voltage based on a second control signal is applied across both ends of an electrostatic transducer, and when the first control signal is at a second level, stops the voltage output circuit; a voltage clamp unit that outputs a clamp voltage obtained by clamping the voltage across both terminals of the electrostatic transducer to a first threshold voltage or lower; a control signal output unit that, when the clamp voltage is equal to or lower than a second threshold voltage, outputs the first control signal of the second level, and when the second control signal is higher than a third threshold voltage, outputs the first control signal of the first level; and a degradation detection unit that, when the clamp voltage did not reach a fourth threshold voltage or higher for a consecutive prescribed number of times, outputs a detection signal which indicates that the electrostatic transducer has degraded .
Inventors:
HAYASHI MASAAKI (JP)
SAITO KAZUHIKO (JP)
HARA HIROKI (JP)
MURASE TAKANORI (JP)
SAITO KAZUHIKO (JP)
HARA HIROKI (JP)
MURASE TAKANORI (JP)
Application Number:
PCT/JP2020/020522
Publication Date:
January 07, 2021
Filing Date:
May 25, 2020
Export Citation:
Assignee:
SHINDENGEN ELECTRIC MFG (JP)
SUMITOMO RIKO CO LTD (JP)
SUMITOMO RIKO CO LTD (JP)
International Classes:
H04R3/00; H02M7/48; H04R29/00
Foreign References:
| JP2014193060A | 2014-10-06 | |||
| JPH07255179A | 1995-10-03 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Download PDF: