Multifunction Filter Design Using Bdqfg Miller Ota

In this paper, a low power bulk-driven quasi-floating gate MOSFET based Miller compensated Operational Transconductance Amplifier (OTA) is proposed required particularly in design of Gm-C filter.The analysis of amplifier is compared with low power bulk-driven technique.The performance comparison indicates that bulk-driven quasi floating gate configuration offers better performance.In this configuration the combination of bulk-driven input with quasi-floating gate results in improved transconductance and hence results in high gain and UGB of the OTA.Moreover, simulation of the bulk-driven quasi-floating gate OTA does not suffer from DC convergence problem.A voltage mode multifunction 2 nd order filter design based on proposed BDQFG OTA is also presented.The analysis of all the circuits have been carried out in industry specific node UMC 0.18 micron technology with the help of HSpice simulator.