Timeline for answer to Amplifying a nV signal across a small resistance by Sam
Current License: CC BY-SA 3.0
Post Revisions
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 26, 2017 at 21:24 | comment | added | Sam | @Orhym Aside from lock-in amplifiers being usually big, expensive and quite complex systems, lock-in amplifiers tend to use an AC excitation waveform to feed the circuit under test. They do this because by using a frequency other than DC, they can control the 1/f noise. But the catch is that your circuit has to either be driven from the lock-in amp or be synchronized (very, very well) with the lock-in amp. Properly setting up and configuring a lab grade lock-in amp can be quite an involved process. | |
| Mar 25, 2017 at 21:37 | comment | added | Orhym | Can you expand briefly on the challenges of using a lock-in amplifier? | |
| Mar 25, 2017 at 21:29 | history | answered | Sam | CC BY-SA 3.0 |