Title:
超音波カテーテル用前置増幅器と保護回路
Document Type and Number:
Japanese Patent JP4814428
Kind Code:
B2
Abstract:
An ultrasound catheter wherein a rotatable transducer couples to the input of a preamplifier. Protection circuits at the input and output of the preamplifier protect the preamplifier from the transducer excitation signal. The preamplifier couples to the distal end of a transmission line. In an alternate embodiment, at least one switch responds to the presence of the transducer excitation signal by coupling the transducer excitation signal to the rotatable transducer and protecting the preamplifier from the transducer excitation signal. The at least one switch responds to the absence of the transducer excitation signal by coupling a received signal produced by the rotatable transducer to the input of the preamplifier. The at least one switch further responds to the absence of the transducer excitation signal by coupling the output of the preamplifier to the distal end of the transmission line.
Inventors:
Thomas Sea Moore
Bayo Suorusa
Donald Masters
Bayo Suorusa
Donald Masters
Application Number:
JP2000610350A
Publication Date:
November 16, 2011
Filing Date:
April 06, 2000
Export Citation:
Assignee:
Boston Scientific Limited
International Classes:
A61B8/12
Domestic Patent References:
| JPH06217980A | 1994-08-09 | |||
| JPH0595950A | 1993-04-20 | |||
| JPH01160535A | 1989-06-23 | |||
| JPH05277113A | 1993-10-26 | |||
| JPH08275529A | 1996-10-18 | |||
| JPH1141155A | 1999-02-12 | |||
| JPH06154217A | 1994-06-03 | |||
| JPH0529235A | 1993-02-05 | |||
| JPS57191579A | 1982-11-25 | |||
| JPH02185238A | 1990-07-19 |
Attorney, Agent or Firm:
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Yasushi Yamamoto
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Yasushi Yamamoto