DocumentCode
1207326
Title
A Low-Power Combination Electrocardiogram-Respiration Telemetry Transmitter
Author
Beerwinkle, Kenneth R. ; Burch, John J.
Author_Institution
Veterinary Toxicology and Entomology Research Laboratory, Agricultural Research Service, U.S. Department of Agriculture, College Station, TX 77840.
Issue
6
fYear
1976
Firstpage
484
Lastpage
486
Abstract
An FM-FM-modulated radio-telemetry transmitter for detecting and transmitting an electrocardiogram (ECG) and respiration activity simultaneously on a single carrier frequency in the 88-108 MHz band is described. Respiration is detected by the impedance pneumographic principle by using the same pair of electrodes used for the ECG. The circuit requires less than 350 ¿A from a ± 7 V mercury battery supply and about 185 ¿A from a 1.35 V mercury battery. Signals can be transmitted over distances up to 50 ft for about 4 weeks without battery replacement and appreciable changes in calibration.
Keywords
Batteries; Circuits; Electrocardiography; Electrodes; Frequency; Impedance; Operational amplifiers; Radio transmitters; Telemetry; Toxicology; Animals; Electrocardiography; Electronics, Medical; Respiration; Telemetry;
fLanguage
English
Journal_Title
Biomedical Engineering, IEEE Transactions on
Publisher
ieee
ISSN
0018-9294
Type
jour
DOI
10.1109/TBME.1976.324564
Filename
4121089
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