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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. If it’s really 1 mF uF it’s an electrolytic capacitor, which WILL leak a few microamps, depending on age, temperature, and bias voltage.
National Semiconductor
To minimise the leakage it needs to be properly biased about half its rated voltage so that the electric field builds up the insulating layer by The clue is in its name If the resulting DC bias is a problem, there are 2 options:.
Note there is no need for such a large value: Your last comment implies it has trouble even driving ohms, which is not very surprising. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Home Questions Tags Users Unanswered.
Capacitor allowing DC through? What’s connected to the output? What’s the leakage current spec on the 1mF cap?
LMN Datasheet(PDF) – STMicroelectronics
What happens if you put a K pull-down on the output? An oscilloscope is only connected to the output, i double checked, but its on the board board with many components on it, maybe that could be it? TonyEErocketscientist You ddatasheet rocket my apologize, adding a load fixed the offset issue.
Curious as why this happened? Caps hold a charge voltage if there is no load.
If the resulting DC bias is a problem, there are 2 options: A load resistance of a few kilohms will reduce the DC output to a few millivolts Or replace the capacitor with a lower leakage type film cap or ceramic.
The reasoning I am using such a high value capacitor is due to it high pass nature it creature with the load, the higher I use the likely hood it will pass all the output signal to the output stage. If a lower one would be used it will attenuate the signal at the output. So what datssheet the datashet And what do you mean l,833n VOM? But that makes a lot of more sense, thank you so much for shedding some light.

I have a load currently of 10ohms, it removes the DC offset however the Voltage pkpk severely drops oppose to taking it out. Datasneet output swing is spec’ed in the datasheet for a load of 10, ohms figs 17, Other parameters, for a load of 2 kilohms Power BW page 3, figs 6,7,8 and others.
It will be utterly hopeless driving 10 ohms.
Dual Audio Operational Amplifier
Increase the load to 2 kilohms. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.

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