SENSITIVITY AND ERROR REDUCTION BY COMPONENT SWAPPING IN SWITCHED-CURRENT FILTERS

This paper describes a procedure for the simulation of passive filters using switched-current techniques, where sensitivity re-duction is obtained by swapping the positions and roles of pairs of identical elements at successive switching periods. The tech-nique can produce significant reduction of sensitivity to element mismatches at low cost in terms of added complexity and with-out reducing the operating speed of the circuit. The technique is exemplified for application to component-simulation switched-current filters. 1