Timeline for Photodiode transimpedance amplifier with single supply
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 23 at 17:57 | vote | accept | MrBit | ||
| Nov 23 at 17:32 | answer | added | Simon Fitch | timeline score: 3 | |
| Nov 23 at 11:09 | comment | added | Virgil_Tibbs | The bias voltage at the non-inverting input of the op amp in circuit No. 2 will just add a DC offset at the output of your amplifier. Some clearance from the voltage rails is always a good idea, some op amps even work better that way (bigger open loop amplification etc) | |
| Nov 23 at 11:01 | comment | added | Virgil_Tibbs | Your first schematic uses the photodiode in its photovoltaic mode, so zero reverse bias across the photodiode's terminals. This mostly implies a decrease in dark current. Your second circuit uses the photodiode in its photoconductive mode, the photodiode is reverse biased in order to decrease its capacitance. | |
| Nov 23 at 10:36 | history | asked | MrBit | CC BY-SA 4.0 |