142 And, Chapter 5 IIP 3 system 1 1 IIP 3 1 g 1 3 IIP 3 2 S 1 / 2 1 3 / 2 3 / 2 3 IIP 3 N S 1 S 2 ... S N / 2 1 g 1 g 2 ... g N (5.59) where { S i , i 1, ..., N 1} designates the selectivity of the filters at the various stages. 5.4.1 Generalization of Intermodulation Distortion The relationships presented above can be extended to higher order nonlinearities. Consider the N th order memoryless polynomial: y ( t ) Let g n 10 log 10 ( n ) (5.61) n 0 n x n ( t ) N (5.60)