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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?
op amp – Capacitor allowing DC through? LMN – Electrical Engineering Stack Exchange
What happens if you put a K pull-down on the output? Datasheeet 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 were rocket my apologize, adding a l8m33n 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 datssheet 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 is the load? And what do you mean by 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. Voltage 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. Increase the load to 2 kilohms. Sign up or log in Sign up using Google. Sign up using Facebook.
Dual Audio Operational Amplifier
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