Question

The advantage of a weighted summer operational amplifier is

(a) It is capable of summing various input voltages together

(b) Each input signal may be independently adjusted by adjusting the corresponding input resistance

(c) If one needs both sign of a voltage signal then two operational amplifiers are needed

(d) All of the mentioned

The question was asked by my college professor while I was bunking the class.

This interesting question is from The Inverting Configuration topic in chapter Operational Amplifiers of Electronic Devices & Circuits

Answer 1

Correct answer is (d) All of the mentioned

To elaborate: All of the mentioned are characteristics of a weighted summer operational amplifier over the traditional amplifier.