Electronman
New Member
Hello guys,
I have a question regarding to Op-Amps.
I have read somewhere that there is a zero voltage deference between op-amp's inputs at some situation, the guy who wrote the paper called it virtual short connection.
What's that really and why it does happen? Does it exist for non inverting op-amps too? If two inputs (inverting and non inverting pins) have the same voltage so how does input signal affects the op-amps while the other pin is grounded?
I do not that the negative feedback lowers the input signal to several micro volts but it means that there is a small voltage deference between the 2 inputs (inverting and non inverting).
Besides if we consider the voltage deference of '+' and '-' pins in zero volts then there is not any deferential voltage at those pins to go into op-amp for amplifying?
Thanks for any help.
I have a question regarding to Op-Amps.
I have read somewhere that there is a zero voltage deference between op-amp's inputs at some situation, the guy who wrote the paper called it virtual short connection.
What's that really and why it does happen? Does it exist for non inverting op-amps too? If two inputs (inverting and non inverting pins) have the same voltage so how does input signal affects the op-amps while the other pin is grounded?
I do not that the negative feedback lowers the input signal to several micro volts but it means that there is a small voltage deference between the 2 inputs (inverting and non inverting).
Besides if we consider the voltage deference of '+' and '-' pins in zero volts then there is not any deferential voltage at those pins to go into op-amp for amplifying?
Thanks for any help.