Op Amp Design Basics - Inverting Summing Amplifier - Part 4

http://www.FreedomUniversity.TV. A series of videos on the operational amplifier. You can think of this as a buffer with gain. For questions on these and other videos, contact Professor Santiago at john@e-liteworks.com or vist the above website.

Category:

Education

Tags:

• op
• amp
• design
• basics
• summing
• inverting
• amplifier
• circuit
• kirchoffs
• voltage
• law
• current
• ohms

[drjcircuits]

Yes, you are correct that the weights of the inputs to the summer are one. From a systems perspective, you can weigh the importance of various sensor outputs if you think one sensor is more useful than the other. Hope this helps! Dr J

[Lagonz2000]

Seem like a question with an obvious answer but here it goes:

Is it safe to say that if I make all the Rs the same value, would it make this configuration a "summer" whose amp factors is 1? (with a negative sign, that is)

[drjcircuits]

@Lagonz2000 Yes, you are correct that the weights of the inputs to the summer are one. From a systems perspective, you can weigh the importance of various sensor outputs if you think one sensor is more useful than the other. Hope this helps! Dr J

[salmabanu239]

wer is ip curent how could be the in is equal to ip

[drjcircuits]

@salmabanu239 For an ideal OP AMP, the input resistance is infinite which implies ip and in has zero current going into their respective nodes. Dr J

[Lagonz2000]

Thank you!!! This is soo powerful.

[alexwchen]

thank you very helpful

[JOSY324]

thank alot bro

[omidkh3]

Nicely explained. Many Thanks!