Surgery – Truss – Pad
Patent
1993-11-26
1995-05-16
Jaworski, Francis
Surgery
Truss
Pad
A61B 800
Patent
active
054151724
ABSTRACT:
An apparatus for generating a trigger pulse signal to be used for transmitting an ultrasonic wave includes a reference signal generator for generating a reference signal as a reference to the generation of the trigger pulse signal, a pulse generator for generating the trigger pulse signal after the elapse of a delay time from the reference signal, and a delay time control circuit for controlling the delay time. The delay time control circuit includes a multi-phase clock generator for generating a plurality of clock signals of different phases from each other, a clock selector for selecting one or more of the clock signals, and a pulse generation start circuit for supplying a signal to start the generation of the trigger pulse signal by the pulse generator in accordance with a count derived by counting one of the clock signals selected by the clock selector.
REFERENCES:
patent: 4101761 (1978-07-01), Merryman
patent: 4154113 (1979-05-01), Engeler
patent: 5115416 (1992-05-01), Gehlbach et al.
"Transmitting Pulse Control Device for UTS Diagnostic Device"--Abstract translation, Publ. No. JP2164349 of Yoshikawa et al. published 25-06-90.
Nakamura Yasuhiro
Tan-naka Yoshinao
Watanabe Yoshinobu
Jaworski Francis
Matsushita Electric - Industrial Co., Ltd.
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