urian
Full Member level 3
Does virtual ground occur only if the open-loop gain of a op-amp tend to infinite,or must plus the negative feedback, said deep negative to cause virtual ground?
In my option before,I think virtual ground is only related to the high gain of a opamp without negative feedback.But after I reading Gray's Book,I am confusing that there must be a negative for virtual ground to occur.I dont know which is right,any idea?
In my option before,I think virtual ground is only related to the high gain of a opamp without negative feedback.But after I reading Gray's Book,I am confusing that there must be a negative for virtual ground to occur.I dont know which is right,any idea?