A generalized current mode first order filter using single current controlled differential difference current conveyor

This research paper contains current mode first order filter structures using single current controlled differential difference current conveyor (CCDDCC) and passive components. It can implement both inverting and non-inverting low pass, high pass and all pass functions from the same topology. The gain of the both inverting and non-inverting filters can be electronically controlled with the help of intrinsic resistance at X-terminal of CCDDCC. Phase of all pass filter can be changed over the whole range (180° to -180°). The structures are simulated using PSPICE with TSMC 0.25μm CMOS process. Simulation results agree well with the theory.