Koninklijke Philips Corporation N.V.

Zhijian Sun

Marcel F C Schemmann

A method and structure for generation of signal distortion. In a first embodiment, a first signal distortion generator (SDG) receives a pair of balanced input currents &plus;X and &minus;X, each having a same angular frequency &ohgr;. The first SDG generates a pair of output currents &plus;X&plus;&Dgr;X and &minus;X&plus;&Dgr;X , wherein &Dgr;X &minus;&Dgr;X &equals;G X &plus;G X . G and G are each independent of X, and at least one of G and G is nonzero. In a second embodiment, a second SDG receives an unbalanced input current P having an angular frequency &ohgr;. The second SDG generates an output current U of a form P&plus;(&agr;P&plus;&bgr;P &plus;&ggr;P )/2. &agr;, &bgr;, and &ggr; are each nonzero and each independent of P. The second SDG includes a distortion generating circuit path that has an input impedance ratio of at least 5 and an output impedance ratio of at least 5.

Distortion generation in balanced and unbalanced signals

The present invention relates generally to an amplifier such as that with the radio frequency (RF) spectrum having a nonlinear feedback loop to cancel out distortions in the input signal, and method therefor.

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Jamesville, NY, United States of America

Zhijian Sun