A MOCCII current-mode KHN filter and its non-ideal characteristic research

A KHN (Kerwin-Huelsman-Newcomb) current-mode filter circuit based on MOCCII (second generation current conveyor with multiple outputs) is present. The circuit, which is constructed by three MOCCH and six RC elements, can realize a lowpass filter, a bandpass filter and a highpass filter at same time. By a simple current operation, a bandstop filter and a allpass filter can be obtained. The circuit has a low sensitivity and is integrated conveniently for RC elements are grounded. Compared with voltage-mode KHN filters based CCII (second generation current conveyor), it also has a simper structure and much fewer active elements. The non-ideal characteristic of MOCCII is analyzed, and compensation method is present. In the last, the circuit PSPICE imitation results before compensation and after compensation are given.