Realization of current-mode multifunction filters using multiple-output current conveyors

This paper presents novel circuit configuration for realizing current-mode one-input and three-output type biquads using multiple-output current conveyors (MOCCIIs) and grounded passive elements. These circuits realize high-pass, band-pass and low-pass transfer functions simultaneously. By connecting output terminals, we can also realize bandstop and allpass transfer functions. The circuits use grounded capacitors, and have high output impedances which are suitable for current outputs. The cutoff frequency of the filter can be tuned independently of Q by the value of current gain K.