DESIGN OF LOW-VOLTAGE LOW-POWER COMPLEX ACTIVE-RC FILTERS

摘要

In this paper, novel realization of low-voltage low-power active-RC complex filters is presented. The previously proposed method to compensate for opamp non-idealities in real active-RC filter design, which is suitable for low-power low-voltage application, is extended such that it can be used in the case of complex filter design. Subsequently, fifth-order Chebyshev complex filter with 1-MHz center frequency, bandwidth and 0.5-dB bandpass ripple has been designed for Bluetooth application. Simulation results show that the designed complex filter consumes about 1mW under 1-V single supply. Its image rejection ratio (IRR) and out-of-band third-order input intercept point (IIP3) are about 80 dB and 37.5 dBV_p respectively.