All-pass filter for rich cascadability options easy IC implementation and tunability

This paper presents two current-mode all-pass sections, employing only grounded components, which is important from the integrated circuit (IC) implementation point of view. The use of the grounded capacitor allows the IC implementation with standard CMOS technologies. The circuits can be made electronically tunable due to grounded resistors that can be realized by using voltage controlled MOS based resistors. In addition, the circuits have both low input impedance and high output impedance for easy cascadability. The stability analysis proves that the circuits are stable. SPICE simulations and experimental results are in close agreement with the theory.

[1]  Yutaka Fukui,et al.  Research note Realization of all-pass networks using a current conveyor , 1988 .

[2]  Z. Wang,et al.  2-MOSFET transresistor with extremely low distortion for output reaching supply voltages , 1990 .

[3]  Ahmed M. Soliman,et al.  Generation of current conveyor-based all-pass filters from op amp-based circuits , 1997 .

[4]  M. Higashimura,et al.  Realization of current mode all-pass networks using a current conveyor , 1990 .

[5]  Neeta Pandey,et al.  All-pass filters based on CCII− and CCCII− , 2004 .

[6]  Shahram Minaei,et al.  A 22.5 MHz current-mode KHN-biquad using differential voltage current conveyor and grounded passive elements , 2005 .

[7]  I. A. Khan,et al.  Simple first order all-pass section using a single CCII , 2000 .

[8]  K. Smith,et al.  A second-generation current conveyor and its applications , 1970, IEEE Transactions on Circuit Theory.

[9]  Hakan Kuntman,et al.  All-Pass Filters Using A Single Current Conveyor , 1998, Proceedings of the 6th International Conference on Optimization of Electrical and Electronic Equipments.

[10]  Sudhanshu Maheshwari,et al.  Novel first order all-pass sections using a single CCIII , 2001 .

[11]  A. Toker,et al.  Supplementary all-pass sections with reduced number of passive elements using a single current conveyor , 2001 .

[12]  Alain Fabre,et al.  On the frequency limitations of the circuits based on second generation current conveyors , 1995 .

[13]  Chun-Ming Chang,et al.  High output impedance current-mode first-order allpass networks with four grounded components and two CCIIs , 2006 .

[14]  Erik Bruun.  CMOS high speed, high precision current conveyor and current feedback amplifier structures , 1993 .

[15]  Alain Fabre,et al.  High performance current processing allpass filters , 1989 .

[16]  R.I. Salawu.  Realization of an all-pass transfer function using the second generation current conveyor , 1980, Proceedings of the IEEE.

[17]  Sudhanshu Maheshwari.  New voltage and current-mode APS using current controlled conveyor , 2004 .

[18]  Jiun-Wei Horng.  Current conveyors based allpass filters and quadrature oscillators employing grounded capacitors and resistors , 2005, Comput. Electr. Eng..

[19]  A. Fabre,et al.  2 GHz controlled current conveyor in standard 0.8 /spl mu/m BiCMOS technology , 2001 .