| 摘要 |
<p>An electronic circuit provides a linear output from a nonlinear transmission device. Second and higher order distortion of the nonlinear device is compensated by applying an equal magnitude predistorted signal with opposite sign to the real and imaginary components of the distortion. The input signal (12), at least one real distortion generating component (16), and in some applications an imaginary distortion generating component (18) are provided to the nonlinear device (20) on an in-line electrical path. An attenuator, an MMIC amplifier, a CATV hybrid amplifier, and a varactor may provide the predistorted signal. The real component of predistortion can be generated by an FET configured as a voltage controlled resistor or by the parallel combination of a diode and resistor connected in series with the signal path. A separate circuit including antiparallel diodes and reactive elements for generating frequency-dependent third order predistortion is provided.</p> |
