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):
Report Date:
1976-06-08
Pagination or Media Count:
8.0
Abstract:
The patent relates to a low-power, transient-free, multi-channelled biotelemetry system which uses a series of CMOS 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:
Subject Categories:
- Biomedical Instrumentation and Bioengineering
- Telemetry