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i need a designfor absolute value with opamp?

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xxtigerxx

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op amp absolute value

i need a designfor absolute value with opamp?


THX
 

opamp absolute

Go to h**p://www.ibiblio.org/obp/books/socratic/output/opamp8.pdf.
.
The circuit in question 8 is the classic precision full wave rectifier. By placing a capacitor across the feedback resistor of the 2nd op-amp stage, you wil get a DC voltage that is equal to the average of the input voltage, regardless of the input voltage waveform.
 

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