FM Demodulation Based on FM to PWM Conversion With Voltage Gain Control

DOI

10.2991/iccnce.2013.34How to use a DOI?

Keywords

Pulse-width modulation (PWM), Zero crossing (ZC), Voltage gain control (VGC)

Abstract

This paper attempts to present the FM demodulation based on FM to PWM conversion with voltage gain control (VGC). The proposed scheme is based on the basic principle of zero crossing (ZC) for conversing FM to PWM. The PWM-signal is filtered by low pass filter (LPF). The result is the message signal (speech, music, etc.). The outstanding feature of this method is that the pulse width of PWM signal influences the amplitude of demodulated signal. It can be adjusted by VGC affecting the gain of a message signal. The proposed circuit has relatively simple and efficient. It consists of monostable multivibrator and low pass filter (LPF). The experimental and synthesis results from MATLAB confirm the mathematics analysis.

Copyright

© 2013, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Rapeepong Boongsri
AU  - Paramote Wardkein
AU  - Peeramed Chodkaveekityada
PY  - 2013/07
DA  - 2013/07
TI  - FM Demodulation Based on FM to PWM Conversion With Voltage Gain Control
BT  - Proceedings of the International Conference on Computer, Networks and Communication Engineering (ICCNCE 2013)
PB  - Atlantis Press
SP  - 140
EP  - 143
SN  - 1951-6851
UR  - https://doi.org/10.2991/iccnce.2013.34
DO  - 10.2991/iccnce.2013.34
ID  - Boongsri2013/07
ER  -