Patent ID: 6359507
Filing Date: 2002-03-19
Classification: H03F

Abstract:
An automatic predistortion system comprising:a first circuit; at least one processing circuit having at least one input and at least one output, the processing circuit being coupled to the first circuit; and a scanning circuit coupled the at least one processing circuit and the first circuit which scanning circuit comprises a first sweep receiver that scans signals applied to the system, a second sweep receiver that scans a side band of the applied signals at the at least one output of the at least one processing circuit and a voltage controlled oscillator coupled to the first and second sweep receivers where the second sweep receiver obtains information about distortion produced by the at least one processing circuit and uses that information to modify the distortion produced by the first circuit which modified distortion is applied to the at least one input of the at least one processing circuit so as to substantially reduce the distortion produced by the at least one processing circuit.