Abstract: “A second order OTA-C filter based on OTA integrator and register is selected as a suitable structure in the design of universal filter by selecting proper inputs VA, VB and Vc. This selection reflects the Q factor sensitization in obtaining -3dB frequency in low-pass, high-pass, band-pass and band-reject filter structures. The variation in the values of C1 and C2 and their contribution in the values of Q factors is studied. The studied structure is superior to the other types of filters at radio and microwave frequencies in communication system.”

Keywords: OTA-C Operational Transconductance AmplifierCapacitor, Ib1 Bias current of OTA1 , Ib2- Bias current of OTA2, BW- Band width