一种高传真电子管扩音机的设计  

Design of a High Fidelity Electron Tube Amplifier

作　　者：邰若鹏 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125100

出　　处：《电声技术》2014年第3期41-43,共3页Audio Engineering

摘　　要：为解决以往的电子管扩音机倒相级存在屏阴分割倒相电路无电压增益、上下两臂输出阻抗不等、上下两臂对地分布电容不等等问题,设计了一种高传真扩音机。该扩音机采用将前置放大电子管的信号输入倒相管的"信号地"电位抬至与第倒相管的阴极相等的电路,解决了传统屏阴分割倒相电路的上述问题,并采用合理的设计改善了扩音机的谐波失真与频率特性。In order to solve the problems of previous electronic tube amplifier anode - cathode division phase inverter circuit without voltage gain, upper and lower arm output impedance unequal, upper and lower arm distributed capacitance to electrical grounding unequal and so on, to design a hi - fi amplifier. The amplifier adopts the preamplifier tubes transport the signal to the inverter tube＂ signal electrical grounding＂ up to and inverted tube cathode equivalent circuit, solves the problems of traditional anode - cathode division phase inversion circuit, and use of reasonable design can improve the harmonic distortion and frequency characteristic of amplifier.

关 键 词：扩音机 电子管 推挽 频率特性 谐波失真 屏阴分割倒相 

分 类 号：TN11[电子电信—物理电子学]