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Selective Filters and Tunable Sinusoid Oscillator Using a CDBA
Department of Electronics & Telecommunication Engineering, Jadavpur University, Kolkata, India
Department of Electronics & Telecommunication Engineering, Jadavpur University, Kolkata, India
B. P. Poddar Institute of Management & Technology, Kolkata, India
- 1 Department of Electronics & Telecommunication Engineering, Jadavpur University, Kolkata, India
- 2 Department of Electronics & Telecommunication Engineering, Jadavpur University, Kolkata, India
- 3 B. P. Poddar Institute of Management & Technology, Kolkata, India
Circuits and Systems·Volume 04 (2013)·Pages 227–232·Published 17 April 2013·DOI10.4236/cs.2013.42030
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Abstract
The realization of some new selective filters using single current differencing buffered amplifier (CDBA) and few RC components is presented. The same topology provides lowpass (LP), bandpass (BP) and highpass (HP) characteristics with appropriate choice and location of the RC components in the circuit. Incorporation of a suitable feedback loop through a voltage buffer unity-gain cell yields a tunable sinusoid oscillator. Effects of the device port mismatch errors ( ε ) and parasitic z -node capacitance ( C z ) of the CDBA element are shown to be insignificant and corresponding sensitivities are extremely low. Satisfactory experimental verifications of the filter quality ( Q ) and oscillator tuning range (500 KHz ≤ f o ≤ 5 MHz) are carried out .
KeywordsCurrent Differencing Buffered AmplifierSelective FilterSinewave GeneratorTunable Oscillator
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