| ??? 02/16/09 06:34 Read: times |
#162456 - transfer function Responding to: ???'s previous message |
Kai Klaas said:
The transfer function of your mentioned circuit is Vout = V2, assuming that the OPamp can handle the much too high input common mode voltage.
What do you intend? Vout = V2 - V1 ? Kai Yes I need that transfer function (Vout=V2) . I mentioned LMP2234 which has an absolute maximum spec says "+/-300mV maximum input differential voltage" (Do I really need to go with absolute maximum ratings?) .I conclude from this is that the opamp won't work. I adopted the topology as mentioned before because the input side has high voltages above the opamp supply rail, but differentially its limited to maximum 5V , is this ok for the opamp input pins or will it have a break down . Regards Ap |
| Topic | Author | Date |
| Opamp question | 01/01/70 00:00 | |
| Please specify! | 01/01/70 00:00 | |
| Oops here its | 01/01/70 00:00 | |
| Mistake? | 01/01/70 00:00 | |
| transfer function | 01/01/70 00:00 | |
| Vout = V2 ? | 01/01/70 00:00 | |
| I 'm entirly confused... | 01/01/70 00:00 | |
| I explain it again | 01/01/70 00:00 | |
| So Vout = V2 - V1 | 01/01/70 00:00 | |
| I do have a common GND | 01/01/70 00:00 | |
| So Vout = V2 -15 ? | 01/01/70 00:00 | |
| trying to achieve | 01/01/70 00:00 | |
| Reference | 01/01/70 00:00 | |
| Reference | 01/01/70 00:00 | |
| Much clearer but.. | 01/01/70 00:00 | |
| Not clear | 01/01/70 00:00 | |
What VOut range do you want? | 01/01/70 00:00 | |
| I think this will do the trick... | 01/01/70 00:00 | |
| re: transfer function | 01/01/70 00:00 | |
| re: transfer function | 01/01/70 00:00 | |
| Ohm's law | 01/01/70 00:00 | |
| Oh the internal protection of opamp! | 01/01/70 00:00 | |
| Errr... | 01/01/70 00:00 | |
| Don't confuse "OPamp" with "OPamp circuit"! | 01/01/70 00:00 | |
| Don't confuse "OPamp" with "OPamp circuit"! | 01/01/70 00:00 | |
| If the feedback loop doesn't work... | 01/01/70 00:00 |