am85
Member level 2
Hi,
I am reading a high voltage square wave using an ADC. Firstly, I have a voltage divider using a 500k ohm resistor on every line coming from the wave generator and a 1.5k ohm resistor between both lines. Then comes the programmable amplifier and the ADC. I get the following plot :
![500k_1.5k.png 500k_1.5k.png](https://www.edaboard.com/data/attachments/26/26797-8e662db41bac4bb43d21311b9b218ced.jpg)
Is this the correct signal i should get? If yes then why is the upper part of the wave a bit tilted and not straight anymore? and is it ok that the edges are round now? how to reduce those effects?
when I exchange the inputs to my circuit I get the following plot, which plot is the correct one ?
![16k_47ohm.png 16k_47ohm.png](https://www.edaboard.com/data/attachments/26/26798-e17d97a23b306953713c001eac18dc15.jpg)
Thanks a lot in advance.
I am reading a high voltage square wave using an ADC. Firstly, I have a voltage divider using a 500k ohm resistor on every line coming from the wave generator and a 1.5k ohm resistor between both lines. Then comes the programmable amplifier and the ADC. I get the following plot :
![500k_1.5k.png 500k_1.5k.png](https://www.edaboard.com/data/attachments/26/26797-8e662db41bac4bb43d21311b9b218ced.jpg)
Is this the correct signal i should get? If yes then why is the upper part of the wave a bit tilted and not straight anymore? and is it ok that the edges are round now? how to reduce those effects?
when I exchange the inputs to my circuit I get the following plot, which plot is the correct one ?
![16k_47ohm.png 16k_47ohm.png](https://www.edaboard.com/data/attachments/26/26798-e17d97a23b306953713c001eac18dc15.jpg)
Thanks a lot in advance.