# How are the arbitrary signal represented, that are applied to the input of transistor? (Assume common mode signal and differential mode signal to be VCM & VDM respectively).

+1 vote
How are the arbitrary signal represented, that are applied to the input of transistor? (Assume common mode signal and differential mode signal to be VCM & VDM respectively).

(a) Sum of VCM & VDM

(b) Difference of VCM & VDM

(c) Sum and Difference of VCM & VDM

(d) None of the mentioned

The question was asked in my homework.

My doubt is from Operational Amplifier Internal Circuit topic in chapter Operational Amplifier of Linear Integrated Circuits

by (39.8k points)
Correct option is (c) Sum and Difference of VCM & VDM

Here's an easy explanation: In practical situation, arbitrary signal are signal are represented as Sum and Difference of common mode signal and differential mode signal.

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