getting error on negative clipping

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Bhuvanesh123

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i am getting 0.7 error on negative clipping.Is there any possible modification that we can make to the below circuit to eliminate that error 0.7v.
 

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There is no error, it is normal.
The diode has its cathode connected to ground (0V) so it conducts when the input goes positive and clips the output to about +0.7V.
When the input goes negative then the diode is reverse biased and does not conduct so the output is the same as the input with a peak of -5V.
 
To eliminate the 0.7V error, use an OP-AMP based precision rectifier. The error will be reduced to a few micro-volts.
 

i am getting 0.7 error on negative clipping.Is there any possible modification that we can make to the below circuit to eliminate that error 0.7v.
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Hi Bhuvanesh
Of course there are many ways to achieve it ! first of all you must know that that's not surprising ! every diode will deal with some voltage across itself while it's conducting !
Anyway , you can use an op amp to remove it , and make it more precise , or perhaps using a series diode with your out put which will remove it but it will add a bit cross over distortion too that i think that isn't important in your case .
Best Wishes
Goldsmith
 

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