I have a very noisy ground plane that I'm trying to clean up a little bit. Below there is a picture of the changes that I have made to reduce the noise. There are two connectors in the circuit a USB (U41) and a mono connector (U142). I added three caps between the input voltage (5V) and the ground plane shown in blue. Bright blue corresponds to the top layer and dark blue is the bottom layer. Any extra noise that I could clean up is going to help me a lot with this circuit. I was getting a lot of ground noise going out through the U142 connector before making these changes. Putting a 1k series resistor in U142 helps a little bit.
I understand that there might be ground loop issues in other parts of the circuit. I have already identified some ground path/loop issues and I have fixed them.
If you have any comments or suggestions on how to improve the noise level in this circuit, I will really appreciate it. Any components I could use? I was thinking about adding Tantalum caps, but I have read that they have a tendency to explode. I'm not sure about that. Any help is greatly appreciated. Thanks.
![1714854351288.png 1714854351288.png](https://forum.allaboutcircuits.com/data/attachments/309/309242-abf9349ebe3d3e59b76cbd00f9fa1c85.jpg)
I understand that there might be ground loop issues in other parts of the circuit. I have already identified some ground path/loop issues and I have fixed them.
If you have any comments or suggestions on how to improve the noise level in this circuit, I will really appreciate it. Any components I could use? I was thinking about adding Tantalum caps, but I have read that they have a tendency to explode. I'm not sure about that. Any help is greatly appreciated. Thanks.
![1714854351288.png 1714854351288.png](https://forum.allaboutcircuits.com/data/attachments/309/309242-abf9349ebe3d3e59b76cbd00f9fa1c85.jpg)