摘要
功率放大器是音响设备的重要组成部分,现在比较流行的功率放大器基本使用晶体管等放大元件,其输入级、推动级晶体管普遍采用共射接法,但瞬态响应不好,重放音乐的层次感、透明度和分辨力不理想,主要是晶体管共射接法的高频响应不好造成的。为了改善放大器的高频响应,尝试采用高频晶体管,改进场效应管、引入渥尔曼电路等,并通过实际测试,取得良好效果,有效地提高了功率放大器的高频响应,达到减少瞬态失真的目的。
A Power amplifier which commonly used in Common-emitter Amplifier is an important part in acoustic equipment. Due to the high-frequency response of transient, it is poorly in transient response and unsatisfactory sense of depth, transparency, definition of music. The use of high-frequency response of transient, field effect transistor and Wallman circuit can efficiently increase the high-frequency response of amplifier. It also has gained good effects after test of practical experiment.
出处
《电声技术》
2010年第10期30-32,共3页
Audio Engineering
关键词
瞬态响应
共射放大电路
共基放大电路
渥尔曼电路
功率放大器
transient response
common-emitter amplifier
common-bass amplifier
Wallman circuit
power amplifier
