Title :
Micropower Pulse Frequency Modulator for Use in an Optically Isolated Catheter System
Author :
Fedel, Salim ; Afromowitz, Martin A. ; Sigelmann, Rubens A.
fDate :
7/1/1982 12:00:00 AM
Abstract :
A micropower pulse frequency modulator (PFM) has been developed for implementing an opticaily isolated system capable of making sensor voltage measurements. The PFM circuit is powered with an array of solar cells which converts light energy into electrical energy. An input port receives the sensor voltage. The PFM signal generated by the circuit drives an infrared emitting diode which provides the frequency-modulated output signal. The PFM circuit can accept sensor output voltages in the range ±500 mV and has a minimum bandwidth of 500Hz.
Keywords :
Catheters; Circuits; Frequency modulation; Optical modulation; Optical pulses; Optical sensors; Pulse measurements; Pulse modulation; Stimulated emission; Voltage; Catheterization; Electrophysiology; Fiber Optics; Humans;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1982.324929
