左右声道输入反相，可以通过将对应的喇叭也交换反接抵消，比如TDA8299BTH的左右输入

markman · 发表于 2018-11-21 21:32

估计TDA8299BTH这样设计是考虑了兼容BTL接法的便利性，上传2文件请教下各位大佬。

TDA8299BTH左右输入反相.jpg

TDA8922BTH.zip (152.06 KB, 下载次数: 157)

xmlhifi · 发表于 2018-11-21 22:37

本帖最后由 xmlhifi 于 2018-11-21 22:40 编辑

半桥电路左右声道反相连接，为抑制电源泵效应，跟BTL没关系。

A no-cost solution to the pumping problem uses the fact that music has low frequency information
that is correlated in both channels (it is in phase). This information can be used to eliminate boost by
putting the two channels of a xxxx amplifier out of phase with each other. This works because
each channel is pumping out of phase with the other, and the net effect is a cancellation of pumping
currents in the power supply. The phase of the audio signals needs to be corrected by connecting
one of the speakers in the opposite polarity as the other channel.

[其他] 左右声道输入反相，可以通过将对应的喇叭也交换反接抵消，比如TDA8299BTH的左右输入

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