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Simple Op-Amp Inverting Amplifier
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[QUOTE="willem2, post: 4670440, member: 200209"] R_3 is connected to the ground and R_2 is connected to a point that's at ground potential because of the negative feedback. These are parallel for the purpose of calculating the potential at the point where R2, R3 and R4 meet. [/QUOTE]
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Simple Op-Amp Inverting Amplifier
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