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How to convert the winding of a radial electric motor to a linear tubular electric motor?

There are winding scheme/calculators and tutorials online for conventional electric motors, but I can't find any clear method of wind linear tubular electric motors. For example, this is the winding ...
Fulano's user avatar
  • 360
1 vote
1 answer
131 views

Find R, L and C in RLC series circuit given voltage over capacitor and current through inductor

I have a couple of exercises in my textbook (Fundamentals of Electric Circuits 6th edition) that look like the following: To solve this problem, my first idea was to transform it into the laplace ...
Tom Cajot's user avatar
0 votes
5 answers
140 views

Superpostion problem, why are resistors shortcircuited?

We are asked to compute the voltage between points \$A\$ and \$B\$ in the following circuit directly i.e. without using Thevenin's or Norton's Theorem: The teacher's solution is divided into three ...
Sam's user avatar
  • 205
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1 answer
67 views

Equivalence in circuits

I'm studying circuit theory, with only linear elements and no capacitors or inductors or mutual inductances, so no differential equations. All the sources (current and voltages) are constant. To be ...
selenio34's user avatar
0 votes
5 answers
239 views

Resistor parallel to diode

How can a circuit where a diode is put in parallel to a resistor be described mathematically? Yes a solution would be to linearize the diode function in a specific point but in my case I need a ...
olympus_mons's user avatar
0 votes
1 answer
84 views

0-12V square wave to linear 12V

Can anyone help me with the design of circuit? I need to use a zero to 12V square wave input and output a linear or straight 12V to carry 2 amperes. I think a collection of capacitors and an inductor ...
Josh 's user avatar
-1 votes
1 answer
64 views

Repurpose adjustable standing desk linear actuator for a project on my truck [closed]

Disclaimer: fairly limited experience with electrical engineering. I'm currently making a deck for my snowmobile that will sit in my truck bed - a 'Sled deck'. Nice sled decks have telescopic sides so ...
MorleyTheMaker's user avatar
-1 votes
3 answers
132 views

Active low pass filter is there any virtual ground point? If yes how can I derive?

I'm learning this MFB active LPF. My questions regarding this as follows: How to derive transfer function for this configuration? Is there concept of virtual ground exist? If yes can you explain ...
Bhushan Waghe's user avatar
0 votes
1 answer
37 views

Power method for approximation of eigenvector representing steady state

I've been testing a method of circuit simulation where I assign an initial voltage to each node, set the current across each wire according to Ohm's law, and then adjust the voltage of each node ...
Hello's user avatar
  • 1
0 votes
2 answers
117 views

Trying to fix a linear power supply of an old video door phone system

I'm a novice electronics engineer and I am currently trying to fix an old linear power supply of a video door phone system. This power supply works as intended with some of its features (12 VDC and 12 ...
j_pentester's user avatar
0 votes
0 answers
37 views

ODE of LTI system

Given an LTI system and for an input \$x(t) = a\cdot tu(t)\$ while \$u(t)\$ is Heaviside function you know that the output is \$y(t) = (t^4+t^3)u(t)\$. If not given that the system has ODE, how can I ...
Yifat Neuwirth's user avatar
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0 answers
24 views

LTI System with Transfer function - Self signal of exponent without complex - question from test

There is an question from test which drives me nuts. Let there be LTI system with transfer function H(s). The impulse response exist: $$\int _{-\infty }^{\infty }\:\left|h\left(t\right)e^{\left(3j+5\...
user323806's user avatar
0 votes
1 answer
121 views

Is a system composed of LTI causal systems is also causal?

simulate this circuit – Schematic created using CircuitLab I have a question which for which I could not find answer. Let us say we have A and B which are LTI and causal systems. Can I say that ...
user323806's user avatar
3 votes
2 answers
685 views

What happens when Vdrain is greater than Vsource in PMOS Transistor?

So as I understand, if Vsd = 0 in a pmos transistor, then the current flow should be zero, and the same goes for if Vs<Vd, now my question is, in what state will be the transistor i.e. cut-off, ...
Nemo Holmes's user avatar
0 votes
0 answers
43 views

Digimess dual linear PSU

Digimess (UK) seem to have gone to the wall, broken links on their website and phone line unobtainable. I wanted try and get the circuit diagram for my LM3002 Dual 30V 1A supply because the +ve side ...
PeterHeater's user avatar
1 vote
1 answer
112 views

Transistor biasing arrangement

I am trying to learn about transistor biasing, and can’t seem to wrap my head around it. First of all I’ll explain what I’m trying to accomplish. I’m trying to build a linear 0-100 V power supply ...
Infernoman's user avatar
0 votes
1 answer
157 views

How to find a linear RLC circuit from its transfer function?

I have a transfer function, for example: $$H(s)= P\frac{10}{s(s+5)(s+9)}$$ See the figure below. How do I make a linear RLC circuit from this transfer function, without using an op-amp, but a linear ...
adhitronic's user avatar
0 votes
0 answers
82 views

LTI system Bode curve

Given an RLC circuit, I needed to find the transfer function, which I did. Now I need to find R and L so that the next two conditions are met: The overshoot is 25% The first peak time is t = 3 The ...
Math king's user avatar
3 votes
5 answers
2k views

Linear PSU design problem

I am trying to develop my own PSU for learning purposes, but would also like to be able to use it once built. The requirements are as follows: The PSU must deliver 1 A at 35 to 40 V (max.) ...
Rikus Coetzee's user avatar
0 votes
1 answer
131 views

How is the transfer function block in simulink labelled as linear ? especially for the cases where variable 's' has power greater than 1

https://www.mathworks.com/help/simulink/slref/transferfcn.html Above weblink gives description about the transfer function block in simulink. I am confused why it is written in the description at top ...
DSP_CS's user avatar
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0 votes
0 answers
57 views

Linear or logarithmic LED bar for speaker overload protection

I have built a 2.1 home cinema audio system. The amplifier modules are severely overpowered for the mid/high speakers I use. Main reason for this is that the amplifier modules (TDA8954) produce an ...
Johannes Linkels's user avatar
3 votes
1 answer
89 views

What is meant by the shifting property of the companion form?

I am going through the book "Linear System Theory and Design" by Chi-Tsong Chen, where they talk about the controllable canonical form and how it is a realization of a transfer matrix. In ...
Abundance's user avatar
  • 133
1 vote
1 answer
65 views

Phone battery charges linearly [closed]

I think this is probably a bit basic, but I've tried googling and have posted elsewhere. The question is vey simple. I've recently bought a new smartphone, with a standard lithium battery. Every other ...
JMyers11's user avatar
17 votes
4 answers
4k views

Why do we need nonlinear electronics for computing?

When I read about photonics, I always see that they can be used for linear transformations (just matrix multiplications), and that this is a limitation that makes them unsuitable for building a ...
croc13's user avatar
  • 173
1 vote
2 answers
82 views

Linear model of diodes for mesh current and nodal voltage analysis?

If we use the piecewise linear model for diodes, can we apply mesh current and nodal voltage analysis to a circuit containing a diode?
Jun Seo-He's user avatar
1 vote
1 answer
112 views

Folded Overload Protection in Linear regulator

Can someone please explain how Q1 is able to protect from overload this linear circuit? Please see below for a simpler schematic of the above:
chami's user avatar
  • 524
4 votes
6 answers
1k views

How can I limit the DC input voltage from an AC rectified source to keep it within limits for 7805?

I have an AC power source that when rectified with 470 µF capacitor gives 38 V DC with no load. I have a 7805 (TO-220) which the data sheet says has a maximum input of 35 VDC. I'm trying to power an ...
Peggy Schafer's user avatar
0 votes
0 answers
39 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?
user avatar
2 votes
2 answers
2k 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: ...
Cartoon Ryan's user avatar
0 votes
4 answers
701 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 ...
Cartoon Ryan's user avatar
1 vote
2 answers
446 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 ...
Jjeico's user avatar
  • 141
1 vote
1 answer
380 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{...
Carl's user avatar
  • 4,001
3 votes
4 answers
2k 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 ...
Jerzy's user avatar
  • 41
1 vote
0 answers
208 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 ...
Howie1337's user avatar
0 votes
2 answers
1k 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. ...
tozhan's user avatar
  • 15
1 vote
3 answers
1k 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 ...
user avatar
3 votes
2 answers
1k 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, ...
Roger Dsuza's user avatar
1 vote
1 answer
461 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 ...
A.H.Z's user avatar
  • 633
3 votes
2 answers
1k 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 ...
Gary Allen's user avatar
0 votes
1 answer
210 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 ...
dimen's user avatar
  • 5
0 votes
1 answer
1k 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 ...
Aaron W's user avatar
0 votes
1 answer
100 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 ...
earl's user avatar
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0 votes
0 answers
85 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 &...
Lyndsay Williams's user avatar
1 vote
4 answers
483 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/...
JKA1976's user avatar
  • 13
3 votes
2 answers
559 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 ...
Autistic's user avatar
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0 votes
0 answers
182 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 ...
SpaetzleKing's user avatar
0 votes
1 answer
146 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 ...
Ravindra Babu Pentela's user avatar
2 votes
6 answers
985 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 ...
Halleff's user avatar
  • 667
0 votes
1 answer
128 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 ...
Christianidis Vasilis's user avatar
0 votes
1 answer
145 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 ...
Schach21's user avatar
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