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发表于 2022-9-10 03:36
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来自 新西兰
本帖最后由 baikal 于 2022-9-10 03:40 编辑
如今,几乎所有可用的音频放大器和扬声器设备都基于电压驱动原理工作,没有明显的例外。这意味着功率放大器充当显示低输出阻抗的电压源,因此努力迫使负载端子上的电压跟随施加的信号,而不考虑通过负载的电流将是多少。
(你提到的电流驱动的放大机,我没见过也没听说过。记得Paul McGowan也讲过放大机是通过电压变化来驱动扬声器运动的,当然电压变化时电流也会变,但是电压是principle的。)
参考文献:
Today, practically all available audio amplifier and loudspeaker equipment works on the voltage drive principle without significant exceptions. This means that the power amplifier acts as a voltage source exhibiting low output impedance and thus strives to force the voltage across the load terminals to follow the applied signal without any regard to what the current through the load will be.
https://www.edn.com/loudspeaker-operation-the-superiority-of-current-drive-over-voltage-drive/
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