0.5 V, low power, 1 MHz low pass filter in 0.18 Î¼m CMOS process

Vasantha, M.H.Laxminidhi, T.2026-02-062012Proceedings - 2012 International Symposium on Electronic System Design, ISED 2012, 2012, Vol., , p. 33-37https://doi.org/10.1109/ISED.2012.46https://idr.nitk.ac.in/handle/123456789/32841In this paper a low power continuous-time 4th order low pass Butterworth filter operating at power supply of 0.5 V is presented. A 3-dB bandwidth of 1 MHz using technology node of 0.18 Î¼m is achieved. In order to achievenecessary head-room, the filter uses pseudo-differential bulk-driven transconductor. A master-slave based common modefeedback(CMFB) circuit sets the output common mode voltageof transconductor. The simulation results show that the filter has a dynamic range of 54 dB and consumes a total power of 36 Î¼W when operating at a supply voltage of 0.5 V. The Figure of Merit (FOM) achieved by the filter is 0.05 fJ, lowest among similar low-voltage filters found in the literature. The simulation result show that the 3-dB bandwidth variation for process, voltage and temperature is less than Â±10%. Â© 2012 IEEE.Bulk-drivenContinuous-timeLow-pass filterTransconductor0.5 V, low power, 1 MHz low pass filter in 0.18 Î¼m CMOS process