Accession Number : ADD002907
Title : Low Level Bio-Telemetry System Using C/MOS Multiplexing.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Vreeland,Robert
Report Date : 08 Jun 1976
Pagination or Media Count : 8
Abstract : The patent relates to a low-power, transient-free, multi-channelled biotelemetry system which uses a series of C/MOS switches coupled to the data sampling electrodes. Shift register pulses selectively enable the switches to sequentially shift the data sample inputs through nine, switch-controlled channels. The switches have little battery drain and, due to their N and P complimentary arrangement, their gating pulses are effectively cancelled and removed from the system channels. Multiplexing precedes amplification by applying switch outputs to a single, low-power amplifier. A special pulse position modulator employing a ramp generator circuit provides the pulse trains to a keyed transmitter. Other significant improvements including a unique shift register arrangement with a synchronizing interval permit long periods of continuous operation undisturbed by the need for battery changes. The transmitted data is received by a suitable demodulating receiver to produce a recordable output for evaluation and computer analysis.
Descriptors : *Telemeter systems, *Biomedical information systems, *Bioinstrumentation, *Patents, Complementary metal oxide semiconductors, Multiplexing, Electronic switching, Electronic switches, Low power
Subject Categories : Biomedical Instrumentation and Bioengineering
Distribution Statement : APPROVED FOR PUBLIC RELEASE