Further Studies on Locked-Oscillator Demodulator

Abstract

This paper examines critically the information extracting capability of a class-C oscillator from an FM wave corrupted by additive white Gaussian noise. In this respect, the performance of a locked oscillator using the class-C operation has been studied in detail with particular emphasis on the effect of the time constant of the grid-leak circuit. It has been shown that the choice of an appropriate value of the time constant increases the capability of the system in detecting the signal. Experimental results have been presented in support of the conclusion.

Indexing Terms:

• Synchronized Oscillators
• FM Demodulator
• Threshold Carrier-to-Noise Power Ratio
• Fokker-Planck Equation
• Quasilinearization Technique

Additional information

Notes on contributors

S. Karmakar

Karmakar, S (b. 1954 April 5). Obtained BSc (Hons) and MSc degrees both in Physics from the University of Burdwan in 1973 and 1975 respectively. He joined the department of Physics, Burdwan Univ. as a JRF (UGC) in 1978. His fields of research interest are Non-linear Oscillations and Space Communications. Mr. Karmakar is presently associated with a research project sponsored by the Department of Science and Technology, Govt. of India as a Senior Research Fellow and is working for his doctoral dissertation. He published several papers in different journals.

K. Pramanik

Pramanik, K: Received her BSc and MSc degrees both in Physics from the University of Burdwan in 1971 and 1973 respectively. She joined the graduate school of the Burdwan University as a Junior Research Fellow sponsored by the University Grants Commission in the year 1976. Her research interest centres around the field of Non-linear Oscillations, Communication, Bioelectronics and Microwave Devices. Studying the phenomena of injection synchronization in solid-state microwave oscillators. Published fifteen papers and presented many research papers at different seminars and symposia.