Low-voltage CMOS current-mode filters using current mirrors: Two alternative approaches

A comparative study of continuous-time analogue filter configurations derived by employing two alternative low-voltage current mirror configurations has been performed in this paper. This is achieved by designing a 5^th-order lowpass filter following the operational emulation (leapfrog) technique of the corresponding passive prototype filter. The behavior of the derived filter configurations has been studied through simulation results, where important performance factors have been considered in order to evaluate the benefits offered by each topology.