Hey, I think I need a little help understanding node voltage analysis with ideal op amps. For the circuit I've attached, at node D, I wrote the equation(adsbygoogle = window.adsbygoogle || []).push({});

((1/1000) + (1/1000))Vd - (1/50000)Vc - (1/1000)Ve = 0

However my prof's equation for node D is:

((1/1000) + (1/1000))Vd - (1/1000)Ve = 0

I don't understand why he didn't include the Vc like I did. I understand that Va = Vc, but you can't just say Va = 0, can you?

thanks much, sean

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# Op amp node voltage help

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