Current-tunable current-mode multifunction filter based on dual-output current-controlled conveyors

Abstract In this paper, a current-tunable current-mode multifunction filter with two inputs and two outputs employing only four dual-output current-controlled conveyors (DO-CCCIIs) and two grounded capacitors is proposed. By appropriately connecting the input and output terminals, the proposed circuit can provide lowpass, bandpass, highpass, bandstop and allpass current responses. The filter also offers an independent electronic control of the natural frequency ( ω o ) and the quality factor ( Q ) through adjusting the bias currents of the DO-CCCIIs. No critical matching conditions are imposed for realizing all the filter responses, and all the incremental parameter sensitivities are low. The characteristics of the proposed circuit are simulated using PSPICE to confirm the theory.

[1]  Hakan Kuntman,et al.  Multi-input single-output filter with reduced number of passive elements employing single current conveyor , 2003, Comput. Electr. Eng..

[2]  M. Bhushan,et al.  Grounding of capacitors in integrated circuits , 1967 .

[3]  Ali Toker,et al.  Insensitive current-mode universal filter using dual output current conveyors , 2000 .

[4]  Kirat Pal,et al.  Inductorless current conveyor allpass filter using grounded capacitors , 1982 .

[5]  D. R. Frey,et al.  Log-domain filtering: An approach to current-mode fil-tering , 1993 .

[6]  Yutaka Fukui,et al.  A Realization of Biquadratic Circuit Using MO-CCIIs and Capacitors , 2003 .

[7]  Chun-Li Hou,et al.  Universal cascadable current-mode biquad using only four CCIIs , 1997 .

[8]  W. Kiranon,et al.  Current controlled oscillator based on translinear conveyors , 1996 .

[9]  E. O. Gunes,et al.  Insensitive current-mode universal filter with minimum components using dual-output current conveyors , 1999 .

[10]  Alain Fabre,et al.  Current controlled bandpass filter based on translinear conveyors , 1995 .

[11]  V. K. Sharma,et al.  New current-mode universal biquad filter , 1999 .

[12]  Wanlop Surakampontorn,et al.  Temperature compensation of translinear current conveyor and OTA , 1998 .

[13]  Hakan Kuntman,et al.  Wide Dynamic Range High Output Impedance Current-mode Multifunction Filters with Dual-output Current Conveyors , 2002 .

[14]  Raj Senani,et al.  A Simple Approach of Deriving Single-Input-Multiple-Output Current- Mode Biquad Filters , 1996 .