MOS Only Grounded Active Inductor Circuits and Their Filter Applications

Abstract

This paper presents two grounded MOS only active inductor circuits. Both circuits have only two MOS transistors and two biasing currents. Thus, the proposed active inductors provide small chip area, tunability, low power consumption with 150 mu W and 90 mu W, respectively. To analyze their performance, a second-order band-pass filter and a third-order high-pass filter structures are presented with low noise as 7.5 nV/root Hz and 9.14 nV/root Hz, respectively. The designed active inductors and filters are simulated in 0.18 mu m CMOS process parameters using LTSPICE.