A new multi-mode multifunction filter using CDBA

A new multi-mode multifunction filter using CDBA is proposed. The original filter has a single current input and three voltage outputs and operates in transimpedance-mode. It can generate all biquadratic filter functions of low-pass, high-pass and band-pass, and also band-reject and all-pass filter responses by selecting different output signal combinations. This filter can be converted into voltage-mode by an additional input resistor. It can also be used in current-mode at the output by using one extra load resistor at each output. With these additional resistors at the input and outputs the filter operates in transadmittancemode. The structure of the new filter proposed contains two capacitors, three resistors and three CDBAs.