Measuring the Slew Rate - test setup

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bababui

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Slew Rate

Hello,
I am trying to check the slew rate of my two stage differential input and single output amplifier. And I just want to make sure I'm seting up the test correctly.
I connected the opamp in unity gain configuration ( shorted negative input to output), and connected V common mode to the positive terminal. Now, do I just apply a square wave to the negative input? I'm a bit confused about that because it's also shorted to the output.
 

Re: Slew Rate

bababui said:
Hello,
...............
Now, do I just apply a square wave to the negative input? I'm a bit confused about that because it's also shorted to the output.

And exactly that´s the reason to feed the step into the positive input.
 

Re: Slew Rate

yes, I'm embarrassed, thank you. I'll think before I ask next time.
 

Slew Rate

Hi babaui,
If you desire to measure it more exactly; you can find such good circuits by Linear Technology & National Semi - Applications Books...
K.
 

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