Analog implementation of fast min/max filtering

Abstract

An analog implementation of running min/max filters based on current-mode techniques is presented. Switched-current delay cells and current/voltage two inputs min/max selectors are used either for current or voltage inputs respectively. The voltage two input min/max circuit is designed using current conveyors and a modified structure of this is used to implement the running min/max filter for window size n=8. Simulation results demonstrate the feasibility of the proposed implementation, which can be extended to a higher window size.