| Autor: |
R. Nandi, S. K. Sanyal, D. Pal |
| Jazyk: |
angličtina |
| Rok vydání: |
1993 |
| Předmět: |
|
| Zdroj: |
Radioengineering, Vol 2, Iss 4 (1993) |
| Druh dokumentu: |
article |
| ISSN: |
1210-2512 |
| Popis: |
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 correspondingtransmitted ones. Experimental results are included. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
