Questions tagged [linear]

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30 views

Quick state feedback controller question

If two estimators where used in a state feedback system, one with error dynamics poles at -10 and -9 and another one at -80 and -90. Which system will give you a better overall performance?
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87 views

What does this question mean?

I'm not sure what the question wants me to do, it is not specific enough.
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2answers
144 views

Linearization of thermistor

Thermistors are highly nonlinear devices . This linearization circuit of a NTC produces a linear response (temperature/resistance).But what should be the values of \$R_{s}\$ and \$R_{p}\$? Image from: ...
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2answers
54 views

Relationship between Vin and Vout of a linear voltage regulator in saturation region

Suppose we have a linear voltage regulator: simulate this circuit – Schematic created using CircuitLab If Vin is above Vth Vout is costant for all values Vin may take.However if Vin is below ...
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2answers
44 views

Signals and systems - Does y(n-1) affects when I check the system for linearity?

I have the following system: $$ y[n] = \frac{x[n]}{3}+ 2x[n-1] -y[n-1] $$ And I have to check its linearity, but I don't know if i'm supposed to evaluate y[n-1] as if it was a x[n-1], or if I have to ...
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1answer
36 views

Derivation of zero state response for LTI system with convolution

Consider this derivation of the zero-state response \$y_{zs} \$ for an LTI system caused by an input \$x(t) \$: - $$\begin{smallmatrix}\begin{array}{r|cc} \text{Input} & \text{Output} & \text{...
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4answers
415 views

How to calculate resistance from points using linear regression?

I have a lists of current and voltage of one device and I would like to calculate the resistance. There are some errors with the ...
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0answers
65 views

What is this linear encoder from a old inkjet printer using a thin metal rod and a metallized glass plate?

What is the working principle of this sensor ? It was found in a canon inkjet printer from around 2000-2005. Not a fancy model, though. The metal rod broke, as it is surprisingly fragile. It doesn't ...
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2answers
70 views

Constant ramp not behaving as expected in SPICE simulation [closed]

Looking for some advice on creating a constant (linear) ramp which meets a certain specification, I've designed this example which works well in ideal simulation but I cannot get it to work in SPICE. ...
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3answers
159 views

Linear (LM317 based?) high current / voltage regulator ( 30 amps at 0 - ~35 volts)

I'm looking to make a linear (LM317 based?) high current / voltage regulator (30 amps at 0 - ~35 volts). I looked at some desings online but still have some problems with it. Maybe you can guide me ...
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2answers
438 views

Capacitance multiplier or parallel capacitors for ultralow noise power supply

For a linear power supply after the bridge rectifier stage, what is the best way to filter the output power? Is it possible to use typical capacitance multiplier circuit with a power BJT or MOSFET, ...
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1answer
69 views

What is the maximum input voltage for the external voltage regulator of the stm32 bluepill?

I am referring to the regulator connected to the USB 5V ( the 5V pin), can it handle a voltage of 12v and step it down to 3.3V for the chip? If not, then what is the upper voltage limit for that ...
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2answers
172 views

Proof that RLC networks are linear?

I've been learning about RLC networks, superposition, two-port circuits etc. and a lot of derivations and equations implicitly assume the fact that the circuits in question are linear, no matter the ...
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1answer
50 views

What does hₖ[n] mean here?

Is the impulse response different from the output y[n]? Is the input x[n] all the delta function at different values of n? From Signals and Systems by Robert Oppenheim, Linear Time Invariant systems
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1answer
51 views

Simplyfing a circuit by replacing two nodes with a voltage source and removing a connection between resistors

I am given the first circuit (A) and I have to find the voltage across R4. Since the potential at node C is independent (V2), I was thinking about a possible transformation to circuit B. However, I am ...
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1answer
87 views

KHN active filter design

I have some design equations from a text book which are designed to realised a KHN filter. However, when implemented and simulated, the values shown do not realise the design. A gain of 20 dB should ...
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1answer
60 views

How to linearly boost the output of a Gaussian shaping amplifier?

I have a pulse detection set up that takes in analog pulses (with relatively long tails, gamma spectroscopy). This pulse is sent into a shaping amplifier, that removes the tail, and shapes the pulse ...
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0answers
75 views

Linear thumbwheel potentiometer obsolete?

I am trying to find a possibly obsolete linear thumbwheel potentiometer, like the type used in old radios. There seem to be plenty of logarithmic pots around. I can find linear but they are marked as &...
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4answers
169 views

Possibly unstable output of linear power supply due to very large current amplfication

I'm designing a linear power supply with an op-amp as error amp and a Sziklai pair as output stage as a hobby project (see schematic below). I'm worried, that the output Vo will be unstable/...
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2answers
103 views

Mosfet thermal problems in linear applications

Modern power FET's can be unreliable in some linear applications due to thermal instability causing die hotspots and premature failure. This is called the Spirito effect. How do Silicon Carbide ...
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0answers
75 views

Switching Power Supply Crowbar

In our lab we have a large fan on an instrument which works fine on a linear power supply but on a switching power supply the supply crowbar even when it's current limit is well above the operating ...
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1answer
69 views

Switching between ac-to-ac transformer taps in regulated linear voltage power supply

I am new to electronics and working on building regulated linear bench power supply 0v to 30v, 3A as my first project. For better performance, wanted to switch between multiple tapas of ac-to-ac ...
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6answers
891 views

Prove that in a *nonlinear* circuit, adding resistor between equipotential terminals draws no current

If a circuit is linear, then you can use Thevenin equivalence to prove that if a port of a circuit has an open-circuit voltage of 0 V (the two terminals are at the same potential), then the resistor ...
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0answers
66 views

Is the system linear, time-invariant and causal? Does the decomposition property hold? Sallen Key bandpass filter

I have this ordinary Sallen Key bandpass filter: - simulate this circuit – Schematic created using CircuitLab I'm being asked, if the system is linear and/or time-invariant and/or causal. ...
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1answer
85 views

Is HP 6623A Linear or Switching power supply?

I have an HP 6623A DC power supply and i wonder if its Linear or Switching power supply. I see in the manual it says linear, but i still wonder. Why i am asking: I am asking this, becouse after ...
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1answer
55 views

two-port networks with voltage sources connected on ends

Suppose we have a two-port network. Then, we connect voltage sources V1 and V2 to the left and right end. For the transmission parameters, t11=V1/V2, then could one use the voltages given by the ...
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1answer
59 views

Positive Voltage on inductor

I am doing some problems in linear and nonlinear circuit analysis, so I have a question...why is the voltage on an inductor represented as \$V=L\frac{di}{dt}\$ instead of \$V=-L\frac{di}{dt}\$, I know ...
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1answer
69 views

DC motor remote control with one push [closed]

I am planning to use 2 actuators as a gate opener. The linear actuators are hooked to a DC motor controller, with remote, so I can open/close the gate by either press and hold one of the two buttons ...
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0answers
36 views

Linear systems, causality input-output

I have been preparing for a midterm and my professor posted a sample midterm but no answers, i solved the question here and asked him if it made sense, and he said the answer will be fully correct if ...
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0answers
41 views

Linear system question

I have been struggling with this linear system's question. [] I have arrived at a solution, but i do not think my solution makes sense.
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1answer
35 views

Changing the second order tansfer function to the standard form

I want to change this second order transfer function to the standard form to obtain tp, Mp and,...how can i change this to standard form?
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0answers
59 views

Controlled solenoid stroke length

Let me create a scenario to better illustrate the problem I have 1500 pens that I want to individually actuate upwards with 3 different distances, ex: 10mm/15mm/20mm I thought I could use a solenoid ...
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0answers
70 views

Subtractor using op-amp

I need to create a subtractor on LT spice using an LT1028A to emulate the difference between 90V and 23V; resulting in 67V. I have tried using a variety of resistance pairs, but in vain. Could anyone ...
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0answers
39 views

Traveling magnetic field

I'd like to do some experiments with a traveling magnetic field. To start with, I'd like to create a traveling magnetic field with a set of coils and try to propel an aluminum sheet. A basic model of ...
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2answers
83 views

What is the relationship between speaker volume change and resistance change?

Assume that we have a speaker whose volume is controlled by the potentiometer. If the resistance of the potentiometer changes by X%, and speaker volume changes by Y%, what is the ideal relationship ...
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2answers
117 views

Do all LEDs have the same optical power vs current curve?

Do all LEDs have the same optical power vs current curve? (NOTE: Thanks to some guidance and patience from some patons of EESE, not to mention my naieve/unfortunate/inaccurate word choice in the ...
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1answer
71 views

Why are state variables sufficient to describe the exact future temporal dynamics of a system

I'm confused about state-space state variables. How come knowing the initial conditions with the input 'determine completely the future behavior of the system'? From such knowledge, I can only ...
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2answers
90 views

What is the current classification of linear motors used for positioning and scanning applications?

I am doing some research on positioning and scanning systems but I am encountering some problems trying to categorize linear motors. I can't understand what type of linear motors based on induction ...
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2answers
891 views

How to add CC/CV feature with single LM358 for variable linear power supply?

I have a few weeks with a problem in the design of my bench power supply. First of all I have this design from this guy on YouTube https://youtu.be/_CFIovMkRyg that made a variable power supply using ...
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0answers
29 views

Linear motion (quiet, variable speed)

I want to use a raspberry pi or arduino to create linear motion, back and fourth, my current goal is to make the pushing part for a baby rocker, but also a swing-rocker as a next project I have looked ...
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2answers
323 views

How do you split a summing point into two?

I am solving a control system example on block reduction rules and stuck on this particular step. According to me, I can move the summing point ahead of the middle block to get G4 multiplied to both ...
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2answers
118 views

Help With Thevenin Resistance Problem

Ok so I'm really new to electrical engineering and I was wondering if someone could help me analyze this circuit using KVL and KCL node analysis. I'm not really sure as to how I can set the KVL and ...
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1answer
235 views

Can someone help me solve this?

A linear circuit is shown in the figure below The VCCS (voltage controlled current source) is defined as 𝑖1=𝛽 ⋅𝑣𝐴 . The other elements in this circuit have the following values: 𝑅1=3.3𝑘Ω , 𝑅...
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2answers
77 views

distance between linear and non-linear function of op-amp system

I have a circuit which I have taken a picture of as you can see, in which i have values of $$R1=1k\Omega,R2=10k\Omega,R3=10k\Omega.R4=10k\Omega,R5=20k\Omega$$ and sine input signal with off-set value=...
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1answer
29 views

Linear electrical network

Is zero input zero output test of an electrical network is necessary and sufficient condition for network to be linear i.e for example if I have electrical network of N-port and I measure current and ...
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2answers
51 views

Current flow and voltage difference

When there is a potential difference between two points in an electric circuit current flows . Then why does not current flow through an open circuit?
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1answer
56 views

finding the current in a branch with resistor, capactor and a voltage source

I'm solving a question in Linear circuit analysis 2 class. the question is to analyze a switching circuit with inductors and capacitors. this is the circuit in the time interval drawn in S-domain ...
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3answers
95 views

Linear or nonlinear

Please is this graph for voltage against distance linear or nonlinear
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5answers
138 views

Why is the linear voltage regulator going hot although within its specification?

I'm having an issue with my NCP718 voltage regulator overheating to the point of thermal shutdown. I have attached a photo of my schematic. I am inputing ~15-20v and outputting 4V from the reg. The ...
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2answers
171 views

How to calculate the number of cycles my linear actuators can run

I've recently bought a set of linear actuators for a personal project of mine and I was wondering how many times can this linear actuator run before my battery runs out. (My battery is rated 12V, ...

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