Simulation of Integrator-Based Current-Mode Universal Filter with Independent Tunable Pole-Q

Abstract

This paper presents the simulation of integrator-based current-mode universal filter with independent tunable pole-Q, synthesized from band-reject filter function. The employing only multi-output OTAs, including with grounded capacitors. The designed universal filter circuit consists of three integrator circuits. The proposed universal filter current-mode provides following advantage, 1. It can be realized as five different filtering transfer functions, low-pass filter (LP) high-pass filter (HP) band-pass filter (BP) band-reject filter (BR) and all-pass filter (AP), within the same circuit. 2. Its quality factor (QP) can be electronically or capacitor adjusted independent of its frequency response ( ωP) 3. Its low active and passive sensitivities. 4. The characteristics of the proposed circuit are simulated based on the PSpice program simulator and all results agree well with the theoretical results.