Timeline for Questions on Operational Amplifiers
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 30, 2014 at 23:49 | comment | added | Ghosal_C | @LvW: Yeah I should have, what I wanted him to understand was that it sources/sinks voltage without sourcing/sinking the current, that's the important point whenever there is -ve feedback... | |
| Nov 27, 2014 at 8:36 | comment | added | LvW | ubuntu_noob: What I am surprised about is the following: You have mentioned the term "negative feedback" not at all. Don`t you think that feedback is the only explanation for the fact that the inverting terminal "acts as a ground"? | |
| Nov 26, 2014 at 21:54 | comment | added | Ghosal_C | yes the ideal op-amp DOES have infinite input impedance, at least when you are trying to understand op-amp circuits that are designed well within its operational range like the inverting gain amplifier, you make the assumption to be infinite, that is exactly why it grounds your signal without sinking your current, the inverting terminal is used for applications where you need a voltage source with very high impedance, this is exactly what makes it such a popular tool when applying feedback, otherwise it is just a differential amplifier with a very high gain. | |
| Nov 26, 2014 at 21:37 | comment | added | user207421 | This is all pretty confused. All you're trying to say is that the op amp has infinite input impedance. This is only greater than other circuits, not a unique peculiarity of op amps. | |
| Nov 26, 2014 at 7:42 | history | answered | Ghosal_C | CC BY-SA 3.0 |