Radio noise solution for Capsense | Cypress Semiconductor
Radio noise solution for Capsense
I used PSoC4 (CY8C4125AXI) for touch key.
touch pattern is made by PET film. and this film is contacted to PCB.
sensitivity, speed is good. but I have one problem.
when I press the tone radio(wakitoki), keys are worked abnormally.
I attached Row,Baseline and SIGNAL data.
some channels ROW are going up, and other channels ROW are going down.
this problem is occured when distance between board and radios is under 30cm
Radion frequency is 100mhz.
I tested change the analogo switch drive source. but It is not much helpful.
I also tesed MBR EVB board using same radio. this board have good immunity for radio noise.
Can I make same immunidy performance using PSoC4 with this touch pattern structure?
please let me know, how can I solve this problem.