| ??? 12/18/07 23:10 Read: times Msg Score: -1 -1 Message Not Useful |
#148482 - or you can use opamp as non inverting summing amp. Responding to: ???'s previous message |
Erik gave you one way to do it, otherway to do that is to use opamp as non inverting summing amplifier,
R3 |\ vin --/\/\/\---| | \ |---|+ \ Vref--/\/\/\---| V+| \ R4 | >----|--- Vout | / | Ground-/\/\/\--|---|- / | R1 | | / | | |/ | | | | | |--/\/\/\/\---| R2 Vout = ((R1 + R2)/R1) * V+ V+ = ((V1 - Vref) * R3) / (R3 + R4) Vout = ((R1 + R2) * (V1 - Vref) * R3) /((R1 * (R3 + R4)) |
| Topic | Author | Date |
| LPC936 with External A/D | 01/01/70 00:00 | |
| Another ADC or a multiplexer | 01/01/70 00:00 | |
| Every 2 seconds | 01/01/70 00:00 | |
| what type of analog signal you are talking about? | 01/01/70 00:00 | |
| I would not, but | 01/01/70 00:00 | |
| Easy | 01/01/70 00:00 | |
| a corrective addition | 01/01/70 00:00 | |
| 74HC4051/74HC4052/74HC4053 | 01/01/70 00:00 | |
| BUT | 01/01/70 00:00 | |
| Then again | 01/01/70 00:00 | |
| Negative readings | 01/01/70 00:00 | |
| Datasheet! | 01/01/70 00:00 | |
| can you please be specific | 01/01/70 00:00 | |
| negative readings? | 01/01/70 00:00 | |
| Not allowed? | 01/01/70 00:00 | |
| Negative ADC readings - again | 01/01/70 00:00 | |
| Like this | 01/01/70 00:00 | |
| I do not understand | 01/01/70 00:00 | |
| BANG!! | 01/01/70 00:00 | |
| In General | 01/01/70 00:00 | |
| Another BANG! | 01/01/70 00:00 | |
| I assumed | 01/01/70 00:00 | |
| Looks like it cannot be done. | 01/01/70 00:00 | |
| you can | 01/01/70 00:00 | |
| Exlain | 01/01/70 00:00 | |
| OK, like this | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
or you can use opamp as non inverting summing amp. | 01/01/70 00:00 |