Timeline for Could DC-DC isolated power supply switching noise harm the input of an instrumentation preamplifier?
Current License: CC BY-SA 4.0
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| Feb 20 at 18:09 | comment | added | Spehro 'speff' Pefhany | If you're worried about thermal noise in a few ohms of resistance, I don't think you want switchmode power supplies anywhere near the front end, for starters. | |
| Feb 20 at 16:11 | history | edited | JRE | CC BY-SA 4.0 |
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| Feb 20 at 16:02 | comment | added | Jens | You could use photovoltaic optocouplers as MOSFET gate supply. They typically provide around 7 V and there will be no switching noise. Probably you need two MOSFET back to back as protection or do you know the polarity of the pulse? | |
| Feb 20 at 15:26 | comment | added | Andy aka | An open MOSFET is not the same as an open valve that controls fluid. You should use the correct terminology for electronic devices to avoid generating confusion. In electronics an "open" means an open-circuit i.e. a circuit that doesn't conduct. | |
| Feb 20 at 15:18 | history | edited | NNN123 | CC BY-SA 4.0 |
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| Feb 20 at 14:41 | history | asked | NNN123 | CC BY-SA 4.0 |