Date of Award
Fall 1993
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
Department
Biomedical Engineering
First Advisor
Jeutter, Dean C.
Second Advisor
Ishii, Thomas K.
Third Advisor
Myklebust, Joel
Abstract
This thesis presents a novel passive biotelemetry system. The system passively communicates the electrode load voltage from the receiver/stimulator to the transmitter using virtually no power from the internal receiver/stimulator battery. This is done by using the stimulator output waveform to modulate the VCO, which is used to turn on/off a MOSFET switch. This causes a change in the input impedance (when the switch is closed 26.5 Ohms to switch open 33.8 Ohms at a k of 0.3) seen from the external primary, and as a result, the primary voltage changes. This change in voltage, induces a voltage in the RF detector coil. After signal conditioning circuitry and scaling, the electrode voltage waveform is recovered as the system's output. This can be viewed by use of an oscilloscope, recorded on a paper chart, or ND converted for computer analysis.
Recommended Citation
DuBore, Renee S., "A Passive Single Channel Biotelemetry System for Implantable Applications" (1993). Master's Theses (1922-2009) Access restricted to Marquette Campus. 4517.
https://epublications.marquette.edu/theses/4517