A low voltage low power CMOS gm-C first order all pass filter

ABSTRACT A low voltage gm-C first order all pass filter circuit is given which uses only two CMOS inverter-based transconductance elements and a capacitor in its realisation. The circuit provides first order all pass filter response without any passive component matching constraints. It uses low component count, possesses low incremental sensitivity, low power consumption and is compatible for monolithic implementation in CMOS technology. The filter is designed and verified using PSPICE simulation. The results on the realised filter verify the theory.