Patent ID: 6490326
Filing Date: 2002-12-03
Classification: H04L

Abstract:
A communication apparatus, comprising:a signal processing circuit having first and second signal paths for separately processing in-phase and quadrature signals, each of the first and second signal paths having an input and an output; a signal source that provides in-phase and quadrature signals; a first switching apparatus coupling the in-phase and quadrature signals from the signal source to the inputs of the first and second signal paths; and a second switching apparatus coupled to the outputs of the first and second signal paths; wherein the first switching apparatus and the second switching apparatus are responsive to a control signal to synchronously interchange signals from the signal source to the input of the first signal path with signals from the signal source to the input of the second signal path, and to interchange signals from the output of the first signal path with signals from output of the second signal path.