Buffer Challenge

Someone is trying to create a set of voltage dividers that divides an input signal down to 1/12 of its original level. Here's what they've come up with so far:

What's the problem here? Try driving the circuit with a square wave to confirm that there are impedance problems between the two divider stages.

Then, design and build an improved version, using the same resistor values. One well placed op-amp buffer should do the trick. Confirm your design by driving the circuit with waves of several different amplitudes.


 

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