Timeline for Function of resistor in OpAmp circuit
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 20, 2017 at 18:40 | vote | accept | Matt L. | ||
| May 20, 2017 at 18:23 | comment | added | D.A.S. | R5 makes R1 redundant since the DC voltage across +- inputs is always the same. whether biased to 0V for split supplies or V+/2 for single supply. Use the largest V+ avail. to prevent saturation, unless you like fuzz guitar and note GBW needed for gain used. I chose 3MHz min for gain of 100 to give 30kHz BW | |
| May 20, 2017 at 17:10 | comment | added | Matt L. | Thanks for your answer. So the conclusion is that R1 is actually redundant? That was also my first thought, but my circuit knowledge is a bit rusty. Note that this is part of a circuit in a commercial device which has been sold many times, so I wonder if/how there can be such a design flaw (if it actually is one). | |
| May 20, 2017 at 16:10 | history | edited | D.A.S. | CC BY-SA 3.0 |
added 37 characters in body
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| May 20, 2017 at 15:59 | history | answered | D.A.S. | CC BY-SA 3.0 |