Questions tagged [voltage-source]

Anything related to voltage sources, their circuit models and their practical circuit implementations. An ideal voltage source is a two terminal device whose output is a voltage signal with a given waveform regardless of its load, i.e. irrespective of the circuit to which is connected.

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Superposition with dependent sources

If the value of a dependent source (say CCCS) depends on the value of an independent source (say a current source). When setting the current source to 0, would that make the CCCS an open circuit (i.e. ...
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33 views

Power supplied by voltage source at non-inverting op-amp input

Take this differential amplifier: Where Vout is proportional to (V2-V1). Both op-amps are ideal with linear output. How to determine the power supplied by input voltage sources? Power should be P = V*...
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56 views

The most energy and space efficient source of 6 V DC for a trail camera

I use several low-end trail cameras for monitoring wildlife. All of them are powered with 4 x 1.5 V AA batteries. Replacing non-rechargeable cells in several trail cameras starts to generate more ...
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39 views

Superposition analysis with VCCS

I have just started doing electrical engineering course in the university. And I really don't understand how to treat those dependent sources when doing the superposition analysis of the circuit. Here ...
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90 views

Can someone please help me find the equivalent resistor of this circuit?

Well I have to find the equivalent resistor of these ones and I am having a hard time trying to find it so some help will be appreciated. Figure 1. Original schematic. simulate this circuit – ...
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68 views

Thevenin equivalent with multiple sources circuit

Sorry if I may ask an idiot question, but its gonna be for few hours right now I have spent on this question. I am asked to find out the value of the voltage between points A and B, aka Uab, and I am ...
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60 views

Impedance Matching and Reflection Coefficient

Consider a real signal generator (Voltage Source Vs, output impedance Zs, reflection coefficient Γs) and a load Zl with reflection coefficient Γl. I was told that we have maximum power transfer when ...
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299 views

Digital voltage stabilizer relay diagram

I am using this voltage stabilizer relay diagram below, which provides a 16 step-up level. I need to edit it, so that I can made it to work as step-down in case of high voltages such as 245 and above. ...
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72 views

Measuring change in magnitude of electric current due to change in conducting material characteristics

I posted this in the physics section. I now think this might be more appropriate section for these questions. I am looking for answers to the following: What is the order of magnitude of change in ...
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79 views

Behavior of an ECU Digital Output (0-24V) to another ECU (pull-up i guess) input

Recently i had to control a functionality of an ECU using a separate system (another ECU). ECU "A" provides an input pin which if measured in open circuit shows 12V, so i guess it is a pull-up input. ...
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68 views

Li-ion battery and arduinos custom circuitry

So i have to design a board around a dialog SOC (DA14681). The dialog part supports li-ion batteries, it has a charger and fuel gauge and USB detection (to power device in case both usb and dc ...
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37 views

AC regime: Serial connection of ideal current generator and impedance and Parallel connection of ideal voltage source and impedance

I have the following two scenarios in the AC regime: Serial connection of ideal current generator and impedance Parallel connection of ideal voltage source and impedance When we have the first ...
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53 views

Back up 9V battery when circuit is unplugged from AC

I have to work on a circuit that basically goes like this. I have two voltage sources, a 9V battery and AC. The AC is the main source, however, when this is unplugged, the 9V battery must come to the ...
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34 views

Incompatible association

I know that operational amplifiers have a stage in which there is an incompatible association (VCCS + VCVS). How do I show that this configuration gives an infinite gain? I am considering general two ...
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1answer
56 views

How to power several gate drivers with as few power supplies as possible?

I am designing a 3-phase three-level NPC converter (same type as: https://trinhquocnam.files.wordpress.com/2015/12/t-npc.png?w=767&h=434). The box this converter will be placed into is fed with ...
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60 views

DC power filter curicut

I have a problem in powering my wireless Panasonic landline telephone. It works on 9v power with a transformer that work on 220v and gives as output 9v and it works fine with this way. I try to power ...
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31 views

Symetric Voltage source from OpAmp-Potenciometer circuit

I need to design a +/- 4.5 symetric source using only a opamp buffer, a 9V battery and a potentiometer. How can i do it?
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38 views

“Open” diode circuit notation

Below is a transfer function for this diode circuit. Is this truly an open circuit? If it were, wouldn't there be zero current flowing through the resistor, and therefore the input voltage would equal ...