Voltage-to-Frequency Converter II

[Roff]

Unfortunately that doesn't work.

This time, i followed the resistor values in the application note. i just exchange the R18 & R19 values. I got the Triangle!

Can anyone tell me what is happenning?

If the IA is working correctly, the triangle output should be symmetrical around zero volts. Is it?

 

[km]

If the IA is working correctly, the triangle output should be symmetrical around zero volts. Is it?

You mean the output was incorrect?

 

[Roff]

You mean the output was incorrect?

I don't know. I can't tell from your scope photo what the voltage levels of the triangle are.

 

[km]

Hi Ron,

May i ask why at higher frequencies, the waveforms will be distorted?

How does the IA works to get the triangle wave? Is it differentially amplifying the capacitor waveforms?