$2{\mu}m$CMOS 5차 Elliptic OTA-C 필터 설계

Design of 5th-Order Elliptic Filter in $2{\mu}m$ CMOS

A design of 5th-order Elliptic OTA-C filter for operation at 4.2MHz is presented. the filter structure is composed entirely of five OTAs(Operational transoonductance Amplifiers), one buffer and seven capacitors. To prevent decreasing of frequency charaoteristios due to the parasitic effeots of OTA and buffer, the design considering of parasitic capacitance and finite resistane of OTA and fuffer is pertormed. As the result of the simulation using SPICE with $2{\mu}m$ CMOS parameters, The performances were found to be essentially within the specifications` less than 0.25dB passband attenuation, 30dB stopband attenuation and 4.2MHz cut-off frequency were satisfactorily obtained. The number of elements is also considerably reduced than other design methods.