Signal extrication of a pair of quadrature amplitude modulated signals of a particular carrier frequency and phase constant by equally splitting all input signals into two independent circuit paths that contain identical components but one independent circuit path performs a complementary signal processing function with respect to the other resulting in a counterbalance between the two paths, canceling all output signals with the exception of said pair of quadrature amplitude modulated signals which are not canceled because of the singular signal nullification property of a product detector circuit that is a component in each of said independent circuit paths.