Simple switches are used for shifting a signal band, fo, to a new location, fo+f1, without distortion. The band is split into two opposed phases, chopped with square waves of frequencies f1 and odd harmonies 3f1, 5f1, etc., which are weighted in amplitude by the factors 1, one-third, one-fifth, etc., and are finally added. Unwanted components 3f1, 5f1, etc., are found to be easily canceled, obviating a difficult filtering problem.