Open AccessDual-mode multifunction filter realized with a single voltage differencing gain amplifier (VDGA)
Author(s) -
Worapong Tangsrirat,
Tattaya Pukkalanun,
Orapin Channumsin
Publication year - 2021
Publication title -
engineering review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.198
H-Index - 11
eISSN - 1849-0433
pISSN - 1330-9587
DOI - 10.30765/er.1441
Subject(s) - digital biquad filter , high pass filter , voltage controlled filter , active filter , electronic engineering , low pass filter , resistor , band pass filter , butterworth filter , all pass filter , filter (signal processing) , electronic filter , amplifier , capacitor , engineering , voltage , computer science , cmos , electrical engineering
This article presents the dual-mode multifunction biquad filter realized employing only a single voltage differencing gain amplifier (VDGA), one resistor and three capacitors. The proposed filterwith one input and three outputs can configure as voltage-mode or current-mode filter circuit with the appropriate input injection choice. It can also synthesis the three standard filter functions, which are highpass, bandpass, and lowpass responses without modifying the circuit configuration. Orthogonal adjustment between the natural angular frequency (o) and the quality factor (Q) of the filter is achieved. Detail analysis of non-ideal VDGA effects and circuit component sensitivity are included. The circuit principle is verified by means of simulation results with TSMC 0.35-m CMOS process parameters.