| Electronics > Projects, Designs, and Technical Stuff |
| variable gain current amp |
| << < (5/8) > >> |
| Simon:
I don't need too much accuracy. |
| Vovk_Z:
--- Quote from: Simon on May 15, 2020, 12:47:28 pm --- I have found MOSFETS for over 500A that are 300µOhm. I will use 2 in parallel. --- End quote --- - it seems like a bit no-good design - use two 500 A mosfets to measure 0.05-5 A. What resolution do you need? Look into books like "Opamp application" etc, you definitely find strait way to measure what you need (you have to calculate an error budget). |
| Jay_Diddy_B:
Hi, How are you measuring the output of the current amplifier? How many bits do you have? Can it work close to ground? Jay_Diddy_B |
| Vovk_Z:
--- Quote from: Jay_Diddy_B on May 15, 2020, 01:24:31 pm ---Take a look at this: --- End quote --- :-+ |
| Simon:
--- Quote from: Jay_Diddy_B on May 15, 2020, 05:13:16 pm ---Hi, How are you measuring the output of the current amplifier? How many bits do you have? Can it work close to ground? Jay_Diddy_B --- End quote --- it will go to a panel meter. I can get meters that measure 200mV, 2V, 20V. I don't need it to be highly accurate. It's more about repeatability. |
| Navigation |
| Message Index |
| Next page |
| Previous page |