| 摘要 |
<p>The distortion generated due to the nonlinear characteristics of the power amplifier in a repeater network is substantially reduced by generating a compensating signal in a feedforward amplifier network. In the feedforward network an auxiliary amplifier having substantially the same gain and distortion characteristics as the main power amplifier generates a compensating signal having a linear component equal to the linear component of the output signal of the power amplifier and a distortion component equal in magnitude to the distortion component of the output signal of the power amplifier. The phase relationship between the linear and distortion components at the output of the auxiliary amplifier is, however, opposite to the phase relationship between the linear and distortion components of the power amplifier. Thus, when the compensating signal is combined with the output of the power amplifier, the distortion components are substantially canceled and the linear components are added. The substantially distortion-free output signal has greater power than was obtainable in prior art feedforward distortion reduction networks.</p> |
