以电子管微变等效电路分析为基础，设计了一款以驱动高保真耳机为目的的耳机放大器。
Based on the analysis of vacuum tube slight variation equivalent circuit, a headphone amplifier is designed to drive high fidelity headphone.
关于电子器件(例如电子管、晶体管、磁放大器等)的研究与应用的一门科学分支。
Branch of science that deals with the study and application of electron devices, e. g., electron tubes, transistors, magnetic amplifiers, etc.
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