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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.
Sign up or log in Sign up using Google. 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.
LMN datasheet, Pinout ,application circuits Dual Audio Operational Amplifier
But that makes a lot of more sense, thank you so much for shedding satasheet light. And what do you mean by VOM? So what is the load? Voltage output swing is spec’ed in the datasheet for a load of 10, ohms figs 17, TonyEErocketscientist You were rocket my apologize, adding a load fixed the offset issue. Note there is no need for such a large value: Other parameters, for a load of 2 kilohms Power BW page 3, figs 6,7,8 and others. What happens if you put a K pull-down on the output?
I have a load currently of 10ohms, it removes the DC offset however the Voltage pkpk severely drops oppose to taking it out. Caps hold a charge voltage if there datwsheet no load. 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 Sign up using Email and Password.
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The clue is in its name Your last datashet implies it has trouble even driving ohms, which is not very surprising. Curious as why this happened? 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.
What’s connected to the output? If a lower one would be used it will attenuate the signal at the output. If the resulting DC bias is a problem, there are 2 options:.
Capacitor allowing DC through? What’s the leakage current spec on the 1mF cap?