Cascadable current-mode single CCII biquads

Abstract

A new configuration for the realisation of current-mode single-CCII-biquad (SCB) filters with high output impedance is presented. It can synthesise lowpass, bandpass, highpass, notch, and allpass filtering functions with a single CCII connected to five passive RC one-port elements. The quality factor, Q, and the central frequency, ω0, of the proposed SCBs are insensitive to the current tracking error of the CCII. These SCBs have the advantages of low passive sensitivities and independently adjustable ω0 or Q