Accession Number : AD0748605

Title :   An 8-Channel, Ultrasonic, Marine Bio-Telemetry Transmitter Utilizing C/MOS (Complementary metal-oxide semiconductor) Digital Integrated Circuits.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA STATE UNIV LONG BEACH DEPT OF BIOLOGY

Personal Author(s) : Ferrel,Donald W. ; Nelson,Donald R.

Report Date : SEP 1972

Pagination or Media Count : 12

Abstract : Up to 8 multiplexed channels of shark behavioral data at sea are obtained with a 40 kHz acoustic transmitter with a range exceeding 5 km and a life of up to 1 week. Conservation of battery power is achieved with complementary metal-oxide semiconductor (C/MOS) integrated circuits and pulse-interval data format of 10 ms pulses at intervals between 200 ms and 2 sec. A multivibrator oscillator is used to control the operating frequency which is essentially independent of temperature and pressure, and decreases slightly with battery voltage (less than 800 Hz/2-volt drop). An optional crystal oscillator maintains constant frequency. The pulse repetition rate is not significantly affected by voltage, pressure, and temperature. Fail safe devices ensure operation in the event of sensor or multiplexer failure. (Author)

Descriptors :   (*TELEMETER SYSTEMS, SHARKS), TELEMETERING TRANSMITTERS, WIRING DIAGRAMS, OPERATION, INTEGRATED CIRCUITS, RELIABILITY(ELECTRONICS)

Subject Categories : Biomedical Instrumentation and Bioengineering
      Telemetry

Distribution Statement : APPROVED FOR PUBLIC RELEASE