Universal transadmittance filter using CMOS MOCDTA

This paper presents a new realization of transadmittance mode universal filter having three inputs and single output. The circuit employs two current differencing transconductance amplifier (CDTA), two capacitors and two resistors. One of the CDTA has multiple outputs hence, called MOCDTA. The configuration can realizes low pass (LP), high pass (HP), band pass (BP), and notch filter using CMOS based CDTA which greatly reduces the space requirement and power consumption. The circuit offers the advantages of having low input impedance and high output impedance. Both the active and passive sensitivities are low. The natural angular frequency (ω₀) and quality factor (Q) of proposed filter can be electronically controlled. PSPICE simulation results are included to verify the theoretical analysis.