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Current-mode leapfrog ladder filters using CDBAs

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3 Author(s)
W. Tangsrirat ; Fac. of Eng., King Mongkut's Inst. of Technol. Ladkrabang, Bangkok, Thailand ; N. Fujii ; W. Surakampontorn

In this paper, a possible realization of a current differencing buffered amplifier (CDBA) in the low-voltage operation is proposed. A leapfrog simulation of the current-mode ladder network using the CDBAs as active circuit building blocks is then introduced. In order to demonstrate that the CDBA considerably simplifies the leapfrog structure of the current-mode ladder filters, a fifth-order Butterworth low-pass filter and a sixth-order Chebyshev bandpass filter which require a minimum of active components will be presented. PSPICE simulation results are employed to verify the correctness of the realization procedure.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:5 )

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