What does the GND symbol mean?

[meseasky]

in an circuit diagram, the non-inverting input of an OPA is grounded, does it mean that the non-inverting input is really grounded or its input is Common Mode Voltage?

i am really confused here, may you tell me what does the GND symbol mean? thanks!

 

[adsraj]

Re: Question about GND

means, one of the two inputs to opamp (neg terminal in this case) is grounded.

 

[chiarella]

Question about GND

In AC analyse, it means AC ground which DC operation works well.

 

[abcyin]

Question about GND

it depends on the supply, if your circuit is doubled supplied, means Vss for high level and -Vss for low level, then the ground maybe means the middle voltage level.

if not so, then what chiarella said is right. it's AC ground, and try to work normally for DC operation.

hope it helps!

 

[hr_rezaee]

Question about GND

Hi
It is the common mode voltage.
but the common mode can be 0v or other (it depends your circuit).
regards

 

[A.Anand Srinivasan]

Re: Question about GND

it is the common mode voltage,,, most of the books teach using dual supply opamps and hence it will be represented as 0V in them....