# Linearity

Discussion in 'Feedback and Suggestions' started by Unregistered, Feb 3, 2010.

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1. ### Unregistered Thread Starter Guest

Hi,

With respect to explanation of linearity, it would be better if the scaling and additivity property are stated.
For example : Although y=mx+c, with c !=0 is mathematically a linear function, when it comes to circuit, if
an element has V = iR + k, k !=0, then it is not a linear element.

Linearity should also imply, no input = no output.

Regards,

2. ### Wendy Moderator

Mar 24, 2008
21,839
3,051
I disagree with several aspects of those statements, if the graph is a straight line, it is linear. Crossing isn't part of the definition, though for a resistor it is the norm. There are many cases that solid state circuits are linear but not referenced to zero as part of the function.

I agree with this statement (part of the review at the end of the chapter).

Why not register? It is free and easy. We can discuss this in more detail. I've been wrong before, I am not the final arbiter.

3. ### beenthere Retired Moderator

Apr 20, 2004
15,808
295
A single supply op amp may have a linear response to an input, and yet have an output = 1/2 Vcc with no input.

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