Selective Filters and Tunable Sinusoid Oscillator Using a CDBA
Selective Filters and Tunable Sinusoid Oscillator Using a CDBA作者机构：B. P. Poddar Institute of Management & Technology Kolkata India Department of Electronics & Telecommunication Engineering Jadavpur University Kolkata India
出 版 物：《Circuits and Systems》 (电路与系统（英文）)
年 卷 期：2013年第4卷第2期
页 面：227-232页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Current Differencing Buffered Amplifier Selective Filter Sinewave Generator Tunable Oscillator
摘 要：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 (Cz) 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 ≤ fo ≤ 5 MHz) are carried out.
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