Other Parts Discussed in Thread: TL494
Tool/software:
INA128电路输入RC滤波、输入差分并联电容是否会影响其工作；
目前的电路图是否可以优化；
T want to ask Whether the INA128 circuit input RC filter and input differential shunt capacitance will affect its operation;
Whether the current circuit diagram can be optimized;
Schematic diagram
As shown in the figure above, INA128 is used for the output constant current loop sampling of the power supply;
INA128 differential output with RC low-pass filtering, as shown in the figure above, the loop appears obvious oscillation, and the FB waveform of the power chip is shown in the figure below:
INA128输出如下：
The INA128 output is as follows:
去掉差分输入的电容，电源芯片FB波形如下，波形比较稳定：
Remove the capacitance of the differential input, and the FB waveform of the power chip is as follows, and the waveform is relatively stable:
INA128输出，有比较大的开关噪声：
INA128 output, with relatively large switching noise:
