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Realization, compensation, and some applications of single-element tunable differential voltage-controlled current source

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3 Author(s)
Saha, A.R. ; Dept. of Electronics & Telecommunication Engng., Jadavpur Univ., Calcutta, India ; Bandyopadhyay, A.K. ; Nandi, R.

Describes a tunable differential voltage-controlled current source (DVCCS) realization scheme using operational amplifier (OA) devices. Studies on its design, realizability, and some high-frequency applications are included. Detailed analysis towards the investigation of the high-frequency nonidealities and their appropriate compensation schemes are proposed, employing the one-pole frequency-dependence of the OA devices. Applicabilities of the tunable DVCCS in the high-frequency high-Q tunable inverting/noninverting integrator (TII/TNI) network realization are reported. Significant improvement has been obtained in the integrator quality factors, Q, over the existing schemes, with no effect on tunability.

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Circuits & Systems Magazine  (Volume:4 ,  Issue: 3 )