i0like0you
Newbie level 4
Hi,
I want to measure the output voltage of LDO voltage regulator circuit.
However, the output ripple is very sharp, so I think it has high frequency components.
My oscilloscope only supports up to 200MHz bandwidth, so I am worried about distortion from measurement.
I can borrow high bandwidth oscilloscope, but the problem is that it comes with only 50-ohm termination.
If I connect my output to 50-ohm termination, then output would be ground.
I don't know how to measure high speed voltage signal, which has relatively higher impedance than 50 ohm.
I thought of using decoupling cap but I also need to measure DC signal in order to get load regulation.
Is there any general way of measuring this type of signal?
Thank you in advance.
I want to measure the output voltage of LDO voltage regulator circuit.
However, the output ripple is very sharp, so I think it has high frequency components.
My oscilloscope only supports up to 200MHz bandwidth, so I am worried about distortion from measurement.
I can borrow high bandwidth oscilloscope, but the problem is that it comes with only 50-ohm termination.
If I connect my output to 50-ohm termination, then output would be ground.
I don't know how to measure high speed voltage signal, which has relatively higher impedance than 50 ohm.
I thought of using decoupling cap but I also need to measure DC signal in order to get load regulation.
Is there any general way of measuring this type of signal?
Thank you in advance.