Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [linearity]

33 questions
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How is it that two electric currents can travel in opposite directions on the same wire, at the same time, without interfering with each other?

An Introduction to Information Theory: Symbols, Signals and Noise, by John R. Pierce, says the following: While linearity is a truly astonishing property of nature, it is by no means a rare one. All circuits made up of the resistors, capacitors,…
The Pointer
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Linear ODE vs Linear System

I'm currently a third year undergrad electrical engineering student studying linear control system and very much confused regarding the term "linearity". Does the term "A linear ODE" necessarily mean that the system it is describing has to be a…
C.Suwan
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Linear Circuit and System Interpetation

My question is about interpreting a given circuit as being itself a linear system. We know that a linear system needs to satisfy the superposition principle: if \$f(ax_1+bx_2)=af(x_1)+bf(x_2)\$. This means that a zero input should result in a zero…
knzy
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How is it that two electric currents can travel in opposite directions on the same wire, at the same time, without interfering with each other?

An Introduction to Information Theory: Symbols, Signals and Noise, by John R. Pierce, says the following: While linearity is a truly astonishing property of nature, it is by no means a rare one. All circuits made up of the resistors, capacitors,…
The Pointer
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3
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1 answer

PWM nonlinearity

simulate this circuit – Schematic created using CircuitLab I am using the PIC16F1786 in a current transducer to measure 0-1 Amp DC. I use an A/D converter to measure voltage from a Hall Effect and along with some software calculations use the…
Swinee16
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Transimpedence amplifier with photo-transistor linearity

Given that the irradiance and collector current for a (random) photo-transistor is linearly correlated like below. Then I am wondering why the output voltage graph of the transimpedence amplifier from the application notes from Sharp is not…
W30
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Can linearity of photoreceptor be improved by calibration?

I am trying to determine if equipment I already have can be used to take a reading in mcd/m2, for a quality control test. I have a sensor which meets all the requirements listed in the standard test method except that it has a linearity error of <1%…
str3r
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Why linearise around an equilibrium point?

In the control theory dealt in class I was taught to always linearise a nonlinear system around an equilibrium point, i.e., where $$\dot x = 0$$ However, linearization is a Taylor series expansion, so why the equilibrium point in particular? What…
aadil095
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FSR linearization when using adc

I'm using Interlinks 30-49649 Force sensitive sensor(FSR), the FSR resistance decrease when the force applied increase. the FSR datasheet has the following graph. Looking into the graph, a 10K resistor for RM would be the best option, as using…
L. Lt.
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How can a system represented by the relation (y = mx + b) be linear?

It is not clear to me how he goes to the conclusion.
Ali
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Counter potentiometer's varying linearity on a microcontroller

I have a sliding potentiometer and whilst its a linear one, it is not completely linear. I wanted to know if there was a way to filter out the linearity variance using mathematical operators on a microcontroller.
BigBadBatta
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Op - Amp: Linearity, Negative Feedback and Virtual Short

I need some explanations about Linearity, Negative Feedback and Virtual Short for an ideal Operational Amplifier. Precisely, I have been always told that an operational amplifier with negative feedback works in linear region, i.e. that with the…
Kinka-Byo
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Why is the frequency of the response same as that of the forcing function in a linear circuit?

Why is the frequency of the response same as that of the forcing function in a linear circuit? What's the case when the circuit isn't linear?
DiamondDust
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Difference between in-band and out-band 3rd order intercept points?

I am reading the datasheet of this IC. The specification has listed in-band and out-band 3rd order intercept point (Page 11). I have read about intercept points and learned that intercept point of nth order gives the relative magnitude of gain and…
abhiarora
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I'm comparing a couple of GNSS front-end modules. Is a lower In-band IIP3 point better or worse than a higher one?

I would typically compare the small signal gain and noise figure first. One of the FEMs requires an external matching component but other that they are very similar in terms of cost and foot-print size. I reviewed this website tutorial on the…
Samee87
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