MISO universal frequency filter with dual-parameter control of the pole frequency

This contribution presents a universal multiple-input single-output (MISO) filter with the dual-parameter control of the pole frequency. The current-mode filter is of the second order and the required type of the response (low pass, inverting band pass, high pass, band reject and all pass) is obtained by proper selection/combination of input(s). The filter employs two capacitors, two modified current differencing units (MCDUs), each of them with four controllable parameters, and one multiple-output current follower (MO-CF). Pole frequency of the filter is directly influenced by two adjustable parameters in frame of MCDU active elements.