Grounded capacitor first order all-pass filters using single active element

Abstract

Two first order all-pass filters with current input, current and voltage outputs employing single active element are proposed. Both the circuit uses grounded capacitor, suitable for IC implementation and provides current output at high impedance making them suitable for cascading. The proposed circuits are verified through PSPICE simulation using 0.35μm TSMC parameters. © 2009 IEEE.