Generation of Digital Modulation for Optical Communication Using Tunable Active-R Oscillator
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Date
1993-12
Authors
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Abstract
This paper describes the design of an active-R biphase oscillator using a pair of matched Operational Amplifier (OA) and a few resistors. The frequency of oscillation of such oscillator is tunable by a resistor (R0). The oscillator can be readily extended to the digitally tunable version by replacing the tuner resistor with a Binary Weighted Switched Resistor Array (BWSRA). The digitally tunable oscillator can also be hooked up with microprocessor using CMOS CD 4066 switches. Generation of BFSK/BPSK wave modulations have then been considered using this oscillator. Subsequently, the BFSK/BPSK. modulations are used to excite 4N25 Optoisolator. The received BFSK/BPSK signals from the Optoisolator are in full conformity with the corresponding transmitted ones. Experimental results are included.
Description
Citation
Radioengineering. 1993, vol. 2, č. 4, s. 1-4. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/1993/93_04_01.pdf
http://www.radioeng.cz/fulltexts/1993/93_04_01.pdf
Document type
Peer-reviewed
Document version
Published version
Date of access to the full text
Language of document
en