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Wednesday, August 6, 2008

opamp Precision Rectifier

Hi friends,
this is a simple opamp precision rectifier. Very useful in rectifying or making bipolar signals unipolar, specially in small signals where we cannot afford to have that 0.7v drop across the normal diode bridge rectifier.
The circuit shown here gives rectified output going only in the negative direction, as my application required it that way. But if you want rectified positive output, just reverse the direction of both the diodes and you'll get it!

62 comments:

Royce said...

Is this a full wave rectifier ?

CC Dharmani said...

Yup!

Chad said...

Can it be altered to a half wave?

CC Dharmani said...

Yes, remove the vertical diode, put the horizontal diode at 1st opamp output terminal, and connect the feedback resistor between pin2 and the other terminal of the diode. Remove the second opamp & remaining parts.

nitesh said...

Can we also amplify the signal in the same circuit?

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Anonymous said...

please put the description about this circuit.....

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please give some decsription about the working of the circuit..

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This has got some really conceptual working. Please provide circuit description!

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An operational amplifier (op-amp) is a highly efficient precision rectifier that can convert AC signals to DC without causing the voltage drop that is commonly associated with diode rectifiers. It is perfect for signal processing applications where preserving signal integrity is essential because of its high precision and minimal distortion. Its rectifying capacity for tiny signals makes it very useful for precision instrumentation.General law encompasses rules and regulations established by governments to maintain order, protect rights, and ensure justice. It includes civil, criminal, and administrative law, governing areas like contracts, property, and personal conduct. Law serves to resolve disputes, penalize unlawful actions, and provide a framework for societal functioning, ensuring fairness and security within the community.
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