Old senior design project and in schematic I see he uses ferrite bead and capacitor after charge pump voltage output befor connecting to opamp input
Circuit very simple:
1. charge pump uses MAX232 to get +- 12V output from 0-5V input
2. +- 12V output rails from MAX232 having ferrite bead and capacitor in line
3. output of above connected to Vdd/Vss of dual rail opamp
Any way of knowing how much ripple reduced from output of charge pump because of using ferrite bead and capacitor in line?
Any measurement to select value of ferrite bead and capacitor?
I also interested as I see ferrite bead and capacitor in line on Arduino board also but they give no value in schematic!
Circuit very simple:
1. charge pump uses MAX232 to get +- 12V output from 0-5V input
2. +- 12V output rails from MAX232 having ferrite bead and capacitor in line
3. output of above connected to Vdd/Vss of dual rail opamp
Any way of knowing how much ripple reduced from output of charge pump because of using ferrite bead and capacitor in line?
Any measurement to select value of ferrite bead and capacitor?
I also interested as I see ferrite bead and capacitor in line on Arduino board also but they give no value in schematic!