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 reduction is obtained by swapping the positions and roles of pairs of identical elements at successive switching periods. The technique can produce significant reduction of sensitivity to element mismatches at low cost in terms of added complexity and without reducing the operating speed of the circuit. The technique is exemplified for application to component-simulation switched-current filters