Voltage-Mode Universal Filter Employing Two Plus-Type DDCCs
Keywords:
Active filters, voltage-mode; DDCC, analog electronics.Abstract
This paper introduces a voltage-mode universal
filter with three inputs and four outputs employing two
plus-type differential difference current conveyors (DDCCs), two grounded capacitors and two resistors. The proposed circuit can act as a high-input impedance multifunction voltage-mode filter with single input and four outputs and can simultaneous realization of voltage-mode lowpass, highpass and two bandpass filter responses from the four output terminals,
respectively, without any component choice conditions. On the other hand, it also can act as a universal voltage-mode filter with three inputs and a single output and can realize all five different generic filtering
responses from the same configuration without any component matching conditions. The circuit dose not require inverting-type voltage single to realize
all the filtering functions. Active and passive sensitivity
performances are low. HSPICE simulation results using TSMC 0.18µm 1P6M CMOS process technology and ±0.9V supply voltages validate the theoretical predictions.
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