Hi all,
I created a op-amp differentiator by myself using LM741 and capacitor with100nf resistor with 10k ohms. However, when I input Ramp signal, my output waveform is like this(graph below). I don’t know why, how can I fix it?
Simulation shows that about 250Ω in series with the input capacitor slows down the slew rate so there's no overshoot or ringing (if it's a standard op amp RC differentiator), even with the lowly old 741.
Also make sure your OpAmp has adequate bypassing by looking at its
supply rails with scope. Polymer Tantalum for bulk best, and a .01/.1 uF
ceramic disk usually suffice.