1引言《电声技术》1997年第9期《防OTL中点瞬时冲击电压电路设计卜文介绍了一个电路，能够有效地消除OTL电路在开机瞬间功放输出中点跃变电压对扬声器的冲击，从而保护功放输出元器件和扬声器，消除了开机时的瞬时高噪声。该电路简单，所用元件少，实践证明效果很好。OCL电路也 1 Introduction “electroacoustic technology” 1997 the ninth period "anti-OTL mid-point instantaneous impulse voltage circuit design Bu Wen introduced a circuit that can effectively eliminate OTL circuit power amplifier output midpoint jump voltage impact on the speaker, Thus protecting the amplifier output components and speakers, eliminating the instantaneous high noise when powering on. The circuit is simple, less components used, the practice proved effective. OCL circuit also