Current-mode versus voltage-mode G/sub m/-C biquad filters: what the theory says

As there is a growing interest in the design of so called "current-mode filters", this paper is concerned with an investigation into the general performance criteria and the speed/dynamic range limits of current-mode G/sub m/-C based filters, compared to conventional voltage-mode G/sub m/-C filters. It is shown here that, as far as speed, dynamic range, and power consumption are concerned and provided that both kinds of filter topology employ the same type of transconductors and capacitors, the result comes out in the favor of the use of the voltage-mode filter processing as a solution for realizing high performance G/sub m/-C filters.