Hey guys,
I am wondering what is the proper way of isolating ICs, Sensors, and Modules from interfering with one another on the same PCB? Power interference that is.
For example, I have a circuit board with a microcontroller, an RF module, and some sensors onboard. The RF works great with the sensors removed from the board... but as soon as the sensors are soldered in the RF barely works. The RF is very sensitive to noise on the power rail. The sensors must be introducing noise into the power some how. Up until now, I have only just used decoupling capacitors on everything, but this doesn't seem to cut it?
I'm wondering if there is a good practice to follow for this stuff in general? I have read up on how you can use a ferrite bead/inductor and some capacitors between parts, but I am looking for a bit more information on this. How do you decide on a decent inductor/ferrite bead for this? Do you put this filter inbetween every single sensor/module on the board and the power interference should be minimal?
Here is an image I came across:
Is there a good general ferrite/inductor and capacitors that I could start off with? I don't know where to start as far as values go.
Thanks and any help is greatly appreciated!
I am wondering what is the proper way of isolating ICs, Sensors, and Modules from interfering with one another on the same PCB? Power interference that is.
For example, I have a circuit board with a microcontroller, an RF module, and some sensors onboard. The RF works great with the sensors removed from the board... but as soon as the sensors are soldered in the RF barely works. The RF is very sensitive to noise on the power rail. The sensors must be introducing noise into the power some how. Up until now, I have only just used decoupling capacitors on everything, but this doesn't seem to cut it?
I'm wondering if there is a good practice to follow for this stuff in general? I have read up on how you can use a ferrite bead/inductor and some capacitors between parts, but I am looking for a bit more information on this. How do you decide on a decent inductor/ferrite bead for this? Do you put this filter inbetween every single sensor/module on the board and the power interference should be minimal?
Here is an image I came across:
Is there a good general ferrite/inductor and capacitors that I could start off with? I don't know where to start as far as values go.
Thanks and any help is greatly appreciated!