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Macromodel of AD 844 AN in PSPICE Library, Mi croSim Corporation, USA, 1992.

has been cited by the following article:

• TITLE: Selective Filters and Tunable Sinusoid Oscillator Using a CDBA

  AUTHORS: Rabindranath Nandi, Palaniandavar Venkateswaran, Sagarika Das

  KEYWORDS: Current Differencing Buffered Amplifier; Selective Filter; Sinewave Generator; Tunable Oscillator

  JOURNAL NAME: Circuits and Systems, Vol.4 No.2, April 18, 2013

  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 (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.