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 Electronics Engineering  |  Question 45 of 94    Print  
What is Virtual Grounding?

  
Total Answers and Comments: 2 Last Update: June 23, 2007     Asked by: k7 
  
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June 09, 2007 23:08:14   #1  
TRILOCHAN        

RE: What is Virtual Grounding?
Virtual grounding is the shorting of the inverting and the non-inverting terminals of the op-amp.
 
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June 23, 2007 00:38:32   #2  
mithilesh        

RE: What is Virtual Grounding?
The i/p resistance of opamp is v high. thus the base currents are v less, approx 0. thus no current flows thru i/p resistance. thus we can say that both the NI and INV terminals of opamp are virtually shorted. i.e the voltage across both terminals is same. thus if NOW one terminal is grounded, due to virtual short other terminal also will be grounded.
 
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Latest Answer :  The op amp connected in a negative feedback configuration, that is the o/p connected to the inverting terminal, tried to produce the same voltage at the inverting node as we applied to the non-inverting terminal, no matter whatever be the o/p.  ...

Latest Answer : The i/p resistance of opamp is v high. thus the base currents are v less, approx 0. thus no current flows thru i/p resistance. thus we can say that both the NI and INV terminals of opamp are virtually shorted. i.e the voltage across both terminals is ...
Read Answers (2) | Asked by : k7


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