本文首先指出了场扫描中产生非线性失真的原因,以及锯齿形成电压U_i应具有什么样的形式,接着以U_i加在RC积分校正网络上为基础,既从物理概念出发分析了预失真校正的原理,又从电路理论角度推出了能指导预失真校正的数学公式,最后用计算机对电路进行计算,得出了与实测波形完全一致的曲线。 This paper first points out the reason of nonlinear distortion in field scanning and the form of sawtooth formation voltage U_i.Furthermore, based on the U_i added to the RC integral correction network, it not only analyzes the predistortion correction Principle, but also from the circuit theory point out the pre-distortion correction can guide the mathematical formula, and finally calculated by computer circuit, obtained with the measured waveform exactly the same curve.