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A programmable active-R sine wave oscillator with microprocessor control

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3 Author(s)
Sanyal, S.K. ; Dept. of Electron. & Telecommun. Eng., Jadavpur Univ., Calcutta, India ; Sarker, U.C. ; Nandi, R.

The design and analysis of a simple active-R oscillator based on a two-pole operational amplifier model are described. The oscillator is tunable by one resistor over a fairly wide range at low sensitivities. A digitally programmable oscillator was derived by replacing the tuner resistor with an array of switched binary weighted resistors. The CMOS switches were activated and controlled by a SDA-UNI-01 microcomputer system based on the 8085 microprocessor. The performance of the programmable oscillator and its extension as a switched frequency-shift-keyed wave generator were verified

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Instrumentation and Measurement, IEEE Transactions on  (Volume:38 ,  Issue: 4 )