Patent ID: 6794938
Filing Date: 2004-09-21
Classification: H03F

Abstract:
An apparatus for substantially reducing nonlinear distortion, the apparatus comprising:a first coupler having an input and first and second outputs, the first coupler capable of splitting an input signal into first and second coupled signals having equal amplitude and in-phase with respect to each other; a first nonlinear device having an input in communication with the first output of the first coupler and an output; a second nonlinear device having an input in communication with the second output of the first coupler and an output; and a second coupler having a first input in communication with the output of the first nonlinear device, a second input in communication with the output of the second nonlinear device and an output, the second coupler capable of 180 degree phase shifting an output signal of the second nonlinear device and coupling the phase shifted output signal of the second nonlinear device with an output signal of the first nonlinear device to generate a final output signal, wherein the first nonlinear device defines a gain as G1 dB, the second nonlinear device defines a gain as G2 dB, the first nonlinear device defines a third order output intercept point as OIP31 dBm and the second nonlinear device defines a third order output intercept point as OIP32 dBm such that the first and second nonlinear devices are provided such that most nearly 2(OIP31âˆ’OIP32)=3(G1-G2), where G1 is not equal to G2.