Four inputs and one output current-mode multifunction filter using CDTAs and all-grounded passive components

This paper presents a new current-mode universal filter with four inputs and one output using four current differencing transconductance amplifiers, two grounded capacitors and two grounded resistors. The proposed circuit can realize of low-pass, band-pass, high-pass, band-stop and all-pass current responses, without component-matching conditions and inverting-type input signals requirements. The natural frequency and the quality factor can be set orthogonally and electronically by adjusting the transconductance gains. The filter also offers the features of low input and high output impedances, low active and passive sensitivities and use of only grounded passive components which is ideal for integration point of view. The characteristics of the proposed circuit are simulated using PSPICE simulators to confirm the presented theory.

[1]  Worapong Tangsrirat,et al.  Systematic realization of cascadable current-mode filters using current differencing transconductance amplifiers , 2006 .

[2]  Worapong Tangsrirat,et al.  Multiple-input single-output current-mode multifunction filter using current differencing transconductance amplifiers , 2007 .

[3]  Hua-Pin Chen.  Single FDCCII-based universal voltage-mode filter , 2009 .

[4]  Dalibor Biolek,et al.  Current-mode biquad employing single CDTA , 2009 .

[5]  Abdhesh K. Singh,et al.  Universal current-mode biquad filter using dual output current differencing transconductance amplifier , 2009 .

[6]  Chun-Ming Chang,et al.  Single FDCCII-based mixed-mode biquad filter with eight outputs , 2009 .

[7]  Yongan Li.  A Modified CDTA (MCDTA) and Its Applications: Designing Current-Mode Sixth-Order Elliptic Band-Pass Filter , 2011, Circuits Syst. Signal Process..

[8]  Costas Psychalinos,et al.  Multiple Input Single Output Universal Biquad Filter with Current Feedback Operational Amplifiers , 2010, Circuits Syst. Signal Process..

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

[10]  Jiun-Wei Horng.  High input impedance voltage-mode universal biquadratic filters with three inputs using plus-type CCIIs , 2004 .

[11]  Hakan Kuntman,et al.  Seventh-order elliptic video filter with 0.1 dB pass band ripple employing CMOS CDTAs , 2007 .

[12]  Hua-Pin Chen.  Voltage-mode FDCCII-based universal filters , 2008 .

[13]  Ahmed M. Soliman.  Current mode universal filter , 1995 .

[14]  Edgar Sanchez-Sinencio,et al.  Generation of continuous-time two integrator loop OTA filter structures , 1988 .

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

[16]  Dalibor Biolek,et al.  Current-mode KHN filter employing current differencing transconductance amplifiers , 2006 .

[17]  B. Wilson,et al.  Recent developments in current conveyors and current-mode circuits , 1990 .

[18]  Montree Siripruchyanun,et al.  Electronically Controllable Current-Mode Universal Biquad Filter Using Single DO-CCCDTA , 2008 .

[19]  Nisar A. Shah,et al.  CDTA based universal transadmittance filter , 2007 .

[20]  Serdar Ozoguz,et al.  A new versatile building block: current differencing buffered amplifier suitable for analog signal-processing filters , 1999 .

[21]  Worapong Tangsrirat,et al.  Structural generation of two integrator loop filters using CDTAs and grounded capacitors , 2011, Int. J. Circuit Theory Appl..

[22]  Jiun-Wei Horng.  High Input Impedance Voltage-Mode Universal Biquadratic Filter with Three Inputs Using DDCCs , 2008 .

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