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Log-Domain First-Order Multifunction Current-Mode Filter Design

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2 Author(s)
Kircay, A. ; Elektrik ve Elektron. Muhendisligi Bolumu, Dokuz Eylul Univ., Izmir ; Cam, U.

A new log-domain first-order multifunction filter is proposed in this paper. The proposed filter is systematically derived using the state-space synthesis procedure from a corresponding block diagram. It provides lowpass, highpass, and allpass responses simultaneously for a single input signal. The filter circuit has a very simple structure, since it uses only BJTs and a grounded capacitor. It can be electronically tuned by changing an external current. The filter has a greater bandwidth due to inherently current-mode and log-domain operation. PSPICE simulations are given to confirm the theoretical analysis

Published in:

Signal Processing and Communications Applications, 2006 IEEE 14th

Date of Conference:

17-19 April 2006