| Electronics > Projects, Designs, and Technical Stuff |
| whats in a keysight ultra low noise DC supply filter? |
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| coppercone2:
if its a capacitor in a box with some resistance, does anyone think the price is a bit steep? |
| David Hess:
--- Quote from: coppercone2 on December 31, 2018, 01:04:38 pm ---if its a capacitor in a box with some resistance, does anyone think the price is a bit steep? --- End quote --- I think it is an LCR circuit with a rather expensive inductor and capacitor but part of the price includes designing the meter to work with it. |
| coppercone2:
the circuit diagrams just show a capacitor (well not really diagrams but menu options or whatever the pictures are for, i listed the page they are found on somewhere in my post. Would they just hide a inductor?) what are they designing in if it uses the sense terminals? what kind of capacitor do you think it is? Military wet tantalum? giant foil beast? |
| David Hess:
--- Quote from: coppercone2 on December 31, 2018, 02:02:31 pm ---the circuit diagrams just show a capacitor (well not really diagrams but menu options or whatever the pictures are for, i listed the page they are found on somewhere in my post. Would they just hide a inductor?) --- End quote --- As far as the load is concerned, it is a capacitor. --- Quote ---what are they designing in if it uses the sense terminals? what kind of capacitor do you think it is? Military wet tantalum? giant foil beast? --- End quote --- I assume the external filter modules use the sense terminals to remove the series resistance of the inductor if needed. The capacitor has to be bipolar. I assume the lower frequency filter uses a pair of big hermetic solid or wet tantalum capacitors and the higher voltage filter uses a big film capacitor. |
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