Patent ID: 7634198
Filing Date: 2009-12-15
Classification: H03F,H04B

Abstract:
1. A distortion circuit for correcting distortion from a nonlinear circuit element by generating a frequency dependent signal having a sign opposite to the distortion signal produced by the nonlinear circuit and substantially the same magnitude comprising: an input signal; a resistor having a first terminal and a second terminal, the first terminal coupled to the input signal; a first nonlinear device coupled to said second terminal of the resistor for generating a first signal that mainly creates a real portion of the distortion, the first nonlinear device being biased at a first biased level; a capacitor having a first terminal and a second terminal, the first terminal coupled to the second terminal of the resistor; a second nonlinear device different from same first nonlinear device and coupled to said second terminal of the capacitor for modifying said first signal to produce an output second signal, said second nonlinear device having a second bias level that mainly creates an imaginary portion of the distortion; means for adjusting said first bias level so that the magnitude of the output second signal can be adjusted; and means for adjusting said second bias level so that the phase and frequency of the output second signal can be adjusted.