Electronics > Beginners
Window comparator as perfect rectifyer?
FriedMule:
I was trying to play with the circuit, just to learn but the online simulator is confusing me big time: http://tinyurl.com/y4jcz686
1VAC in 15VDC out
Audioguru:
Your opamps have no part number and no power supply voltage so they will not work.
The second opamp has positive feedback so if there is a tiny positive input to it then its output will go as high as it can and stay like that (even if the input signal stops) until the power supply is turned off.
I guess the supply is +15V and the opamp is "rail to rail" allowing its output to go as high as +15V.
FriedMule:
--- Quote from: Audioguru on May 27, 2019, 02:04:47 pm ---Your opamps have no part number and no power supply voltage so they will not work.
The second opamp has positive feedback so if there is a tiny positive input to it then its output will go as high as it can and stay like that (even if the input signal stops) until the power supply is turned off.
I guess the supply is +15V and the opamp is "rail to rail" allowing its output to go as high as +15V.
--- End quote ---
Oh thanks a lot, it makes sense, no the AC is 1V.
But I'll change the errors:-)
FriedMule:
--- Quote from: wraper on May 26, 2019, 08:13:11 pm ---
--- Quote from: FriedMule on May 26, 2019, 07:59:16 pm ---Am I wronh in thinking that this circuit: https://upload.wikimedia.org/wikipedia/commons/c/ca/Op-Amp_Precision_Rectifier_%28Improved%29.svg
only is a half-bridge rectifier?
And combined with the comparator, it gets to be a full bridge rectifier?
Hmm does it not loose a lot power in that configuration?
--- End quote ---
Comparator again... Add another diode and opamp and you will have full wave rectifier.
--- End quote ---
I have redrawen my circuit (read stolen a solution)
You show two examples and here is a third: http://tinyurl.com/y3yhr8kt
But how do I know what to choose, what is the difference?
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