Realization of plus-type DDCCs voltage-mode multifunction filter

This paper introduces a new voltage-mode multifunction filter with three inputs and four outputs using two plus-type differential difference current conveyors (DDCCs), two grounded capacitors and two resistors is proposed. The proposed circuit can act as a multifunction voltage-mode filter with single input and four outputs and can simultaneous realization of voltage-mode lowpass, highpass and two bandpass filter signals 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 five generic voltage-mode filter signals from the same configuration without any component matching conditions. Finally, to verify our architecture, we have implemented this analog filter chip with TSMC 0.18 μm 1P6M CMOS technology. This filter chip operates to 1MHz and consumes 230μW. The chip area of the analog filter is 0.79mm².