Precision rectifier

134

01:34:06

It rectifies precisely. Not my circuit, I learned at university class.




Here is some song for you. You should really listen to it, the lyrics are kinda dumb:



I'm gonna fight 'em all
A seven nation army couldn't hold me back
They're gonna rip it off
Taking their time right behind my back

And I'm talking to myself at night
Because I can't forget
Back and forth through my mind
Behind a cigarette
And the message coming from my eyes
Says leave it alone

Don't want to hear about it
Every single one's got a story to tell
Everyone knows about it
From the Queen of England to the hounds of hell

And if I catch it coming back my way
I'm gonna serve it to you
And that ain't what you want to hear
But that's what I'll do
And the feeling coming from my bones
Says find a home

I'm going to Wichita
Far from this opera for evermore
I'm gonna work the straw
Make the sweat drip out of every pore
And I'm bleeding, and I'm bleeding, and I'm bleeding
Right before the lord
All the words are gonna bleed from me
And I will sing no more
And the stains coming from my blood
Tell me go back home

published 6 years ago

hurz

6 years ago

yeah, but the point with such an active rectifier is to do that for voltages below a standard diode threshold or two. A bridge rectifier would be unbeatable with that big +-5V peak voltages. Try with 10mV, thats the point to get proper rectified (demodulated e.g. for a AM receiver).

LeButch

6 years ago

Yeah, I forgot to change it back. Turned it high for testing purpose...

PrathikP

6 years ago

If you look closely, you will see some distortion in one of the half cycles

LeButch

6 years ago

I do, but I dont know what to do about it

hurz

6 years ago

its the high impedance 10kOhm. If you wish to lower that you need to go down in impedance and or capacitance. At the end the quality of the diodes makes it a good rectifier and not the OpAmp. More difficult for higher frequrncies were a single diode is unbeatable.

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