tailieunhanh - A current mode second order filter using dual output CDTA

The circuit employes one CDTA, two capacitors and one resistors. It uses a minimum number of passive and active components, which provides low active and passive sensitivities. SPICE simulation results which utilizes the CMOS transistor based CDTA model, are enclosed. | ISSN:2249-5789 Sunil Kumar Pandey et al, International Journal of Computer Science & Communication Networks,Vol 2(2), 210-213 A Current Mode Second Order Filter Using Dual Output CDTA Sunil Kumar Pandey*, Abhay Pratap Singh*, Manish Kumar*, Sumit Dubey*,Pallavie Tyagi* * Dept. of Electronics and Communication Engineering Jaypee Institute of Information Technology ,A-10, Sector-62, Noida-201307 ,India Tel: +919990067250, +919582946977, +919555862092, +919634043251 E-mail: sunilpandeyiert@, apsingh007@, sumitdubeyjinov@, Abstract— A new current mode 2nd order filter employing single current differencing transconductance amplifier(CDTA), using current mode approach which provides high pass(HP), band pass(BP), low pass(LP) responses simultaneously, has been presented. The current outputs of lowpass(LP) and bandpass(BP) types for driving independent loads and single highpass(HP) current output, flowing through one of working capacitors. The circuit employes one CDTA, two capacitors and one resistors. It uses a minimum number of passive and active components, which provides low active and passive sensitivities. SPICE simulation results which utilizes the CMOS transistor based CDTA model, are enclosed. Keywords—CDTA, Analog Signal Processing, Current Mode Filter, SPICE. I. INTRODUCTION Current differencing transconductance amplifier (CDTA) is used especially for current mode analog signal processing[1].It has been introduced for the synthesis of active filters variety of applications of Current differencing transconductance amplifier (CDTA) can be found in various literature[2]-[5].The active filters in CM have wider band width, simpler circuitry, greater linearity, wider dynamic range and lower power consumption as compared to their voltage mode counterparts[6].The circuits reported so far suffer from the drawbacks of employing either excessive number of components[2][3] or need to change the circuit