Voltage-mode universal biquadratic filter using OTA and Uniform Distributed RC

Abstract

This paper presents the design method for voltage-mode universal biquadratic filter circuit. The characteristics of biquadratic filter can be obtained without changing circuit topology. The proposed circuit is implemented using CMOS internal topology of Operational Transconductance Amplifier (OTA) and Uniform Distributed RC (URC) of single layer type. The frequency response parameters can be adjusted by the transconductance gains of the OTA and by changing the capacitance parameter of URC element without affecting the circuit's quality factor. The performance of the proposed filter circuit was simulated by PSpice. Its simulation results were performed for the low-voltage power supply with only 2V. In addition, the circuit is advantage that there is good magnitude response and low sensitivities of less than one unit. The simulation results are in good agreement with the theoretical calculations. The proposed circuit is very suitable to further develop into a VLSI circuit for communication and signal processing.