Circuit explanation

[andy257]

Hi all,

Could anyone kindly explain what this circuit is doing in a bit of detail. I think I kind of get the basic idea of what its doing but there is some interesting feedback going on which I don't understand what its for.

To me it looks like an AC amplifier that is converted to a DC voltage output?

Thanks for your help

Andy

 

[MikeMl]

I cannot see that this thing does anything useful. It acts as a differentiator for down-going edges of the input. The minimum amplitude of the input to get an output is about 100mV.

What does ADJUST connect to?

I could make a much simpler differentiator, if that is what it is supposed to be?

 

[dr pepper]

I agree, C3 has a big effect on performance, and the circuit appears complex for what it does.

 

[AnalogKid]

An external resistance from ADJUST to 0V changes the peak output voltage without changing (very much) the output impedance.

ak