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本帖最后由 cgpad 于 2024-4-9 22:13 编辑
具有桥式反馈的平衡输出级 在平衡信号传输中，两个相同的信号以相反的相位同时传输，并在接收端组合，从而消除共模噪声和干扰。这确保了纯粹的高质量信号传输。平衡声音传输的原理如图4所示。两个放大器AMP1和AMP2的输出连接起来形成交叉反馈环路，将低阻抗的对称（+）和（-）信号发送到下一级。信号与地线隔离，形成理想的平衡电路。即使输出一侧接地，两个放大器也会继续工作，并且输出电压不会改变。
Balanced Output Stage With Bridged Feedback
In balanced signal transmission, two identical signals are transmitted simultaneously with inverted phase and combined at the receiving end, thereby canceling out common-mode noise and interference. This assures pure high-quality signal transmission. The principle of balanced sound transmission is shown in Figure 4. The outputs of the two amplifiers AMP1 and AMP2 are connected to form a cross-feedback loop, which sends the symmetrical (+) and (-) signals with low impedance to the next stage. The signals are isolated from the ground line, resulting in an ideal balanced circuit. Even if one side of the output is grounded, both amplifiers continue to operate, and the output voltage does not change. |
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发表于 2024-4-5 12:07
