New Gm-C first-order all-pass and amplitude equalizer circuit

In this work, a general OTA-based two-admittance voltage-mode (VM) circuit arrangement is explored to derive new 1
^st
-order all-pass (AP) and amplitude equalizer (AE) filters. The proposed filter circuits are attractive as they use only grounded capacitors. The proposed circuits require single Operational Transcondcutance Amplifier (OTA), single dual output OTA (DO-OTA) and one grounded capacitor. The non-ideality analysis of first-order Gm-C AP and AE are discussed. The results obtained by simulating Gm-C filters realized with CMOS OTA circuits using LTspice have been given.