我想問如果接單opamp個off null係咪唔洗接??

我想問如果接單opamp個offset null係咪唔洗接??
即唔接pin 1同5?

If you are not worrying about DC offset, then you do not need to connect anything. I usually would not connect anything there.

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thanks~咁如果接係咪一定要用vr?

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The purpose of the DC offset is to allow you to adjust the DC offset to 0. If you do not use VR, how do you adjust?

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