Timeline for EDIT: Dropping voltage of high frequency signal using diodes
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 6, 2015 at 12:07 | vote | accept | Derpy_Merp | ||
| Dec 6, 2015 at 12:06 | vote | accept | Derpy_Merp | ||
| Dec 6, 2015 at 12:07 | |||||
| Nov 21, 2015 at 17:59 | comment | added | jp314 | Please give more details -- or a sketch of the waveforms you are expecting. "High frequency with low ripple" doesn't mean much. If you are trying to remove a fixed DC amount, a zener might work but you have to apply DC bias current. If you want to remove all DC components, then a capacitor would work. What frequency are you using ? Why do you need to remove this level ? | |
| Nov 21, 2015 at 16:36 | comment | added | Andy aka | I've read this twice now and I don't understand the question at all. | |
| Nov 21, 2015 at 15:31 | history | edited | Derpy_Merp | CC BY-SA 3.0 |
edited title
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| Nov 21, 2015 at 15:24 | answer | added | Armandas | timeline score: 2 | |
| Nov 21, 2015 at 15:23 | comment | added | Nedd | Why would you consider using diodes to reduce an analog high frequency signal, (rather then a resistive divider)? Do you really have a pure AC signal or might this be a mixed AC signal on a DC voltage? | |
| Nov 21, 2015 at 15:10 | comment | added | Nedd | Not too many diode types will operate at the gigahertz range. Even the capacitance of the diode will leak much of the signal at those frequencies. There are some specialized micro-wave types but putting several in series would be costly. Have you considered using a simple RF transformer or attenuator (like those used on cable TV systems) to reduce the voltage? | |
| Nov 21, 2015 at 15:03 | comment | added | Derpy_Merp | How about RF diodes?? | |
| Nov 21, 2015 at 15:03 | comment | added | Derpy_Merp | @Nedd Thanks for the reply. I'm actually aiming for a few gigahertz (though my implementation might fall lower than that). | |
| Nov 21, 2015 at 15:00 | comment | added | Nedd | How high is the "high" frequency? Most common diodes have other problems when trying to operate at high frequencies. Some Zener diodes will give you their specification related to frequency. Also, remember diodes will rectify AC signals. If just trying to reduce an AC voltage without noise (or rectifying distortion) just use a resistor divider. | |
| Nov 21, 2015 at 14:55 | history | asked | Derpy_Merp | CC BY-SA 3.0 |