Title:
ULTRASONIC RECEIVER AND ULTRASONIC OBSERVATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/225030
Kind Code:
A1
Abstract:
The ultrasonic receiver comprises resin horn portions (300, 301), a piezoelectric element (10) provided to be exposed at the tip of the resin horn portions (300, 301), a stealth amplifier (200a) that is arranged inside the resin horn portions (300, 301) at a set minimum distance from the piezoelectric element (10) in the rear area onto which the outline of the piezoelectric element (10) is projected, and that is set to change the reflection characteristics of an ultrasonic wave that has passed through the piezoelectric element (10), and an input connection means (312) connecting between the piezoelectric element (10) and the stealth amplifier (200a). The set minimum distance is the distance between the piezoelectric element (10) and the stealth amplifier (200a) that is determined by design based on a theoretical minimum value of an input connection parasitic capacitance between the piezoelectric element (10) and the stealth amplifier (200a).
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Inventors:
UMEMURA SHIN-ICHIRO (JP)
TADAKI YOSHITAKA (JP)
TAKEMOTO YOSHIAKI (JP)
OGAYA KAORU (JP)
TADAKI YOSHITAKA (JP)
TAKEMOTO YOSHIAKI (JP)
OGAYA KAORU (JP)
Application Number:
PCT/JP2022/018488
Publication Date:
October 27, 2022
Filing Date:
April 21, 2022
Export Citation:
Assignee:
MEMS CORE CO LTD (JP)
International Classes:
H04R17/00
Foreign References:
| JPH04218765A | 1992-08-10 | |||
| JPH01171200U | 1989-12-04 | |||
| JPH04132498A | 1992-05-06 |
Other References:
G. XING ET AL.: "Review of field characterization techniques for high intensity therapeutic ultrasound", METROLOGIA, vol. 58, 2021, pages 022001
Attorney, Agent or Firm:
AMBO Aiko (JP)
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