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An ultrasonic blood flowmeter telemetry system, using only two integrated circuits and one transistor, has been designed for chronic unanesthetized animal studies. Standard components and construction techniques are utilized. The CW Doppler system employs LZT piezoelectric 10 MHZ transmitting and receiving crystals held in a lightweight polystyrene arterial transducer. The audio frequency, FM Doppler signal modulates an FM oscillator-transmitter to produce an FM/FM radio frequency carrier which is transmitted to an FM receiver at a remote location. The transmitted Doppler audio flow signal is demodulated at the receiver by a zero crossing detector. Power consumption is 48 mw. The 12.4 cc package volume can be further reduced for animal implantation.
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
July 1968,
The American journal of cardiology,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
March 1972,
The Journal of thoracic and cardiovascular surgery,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
November 1971,
Surgery, gynecology & obstetrics,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
January 1970,
Progress in surgery,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
January 1987,
IEEE transactions on ultrasonics, ferroelectrics, and frequency control,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
October 2021,
Sensors (Basel, Switzerland),
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
January 1978,
Electroencephalography and clinical neurophysiology,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
January 1982,
Biotelemetry and patient monitoring,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
January 2023,
Microsystems & nanoengineering,
Y Yonezawa, and
W M Caldwell, and
J C Schadt, and
A W Hahn
January 1992,
Nihon seirigaku zasshi. Journal of the Physiological Society of Japan,
