Questions tagged [theory]

Theory is a contemplative and rational type of abstract or generalizing thinking, or the results of such thinking. Depending on the context

17 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3
votes
1answer
58 views

What are the differences between Greinacher and Bridge voltage doublers?

I was reading a wiki article on Voltage doublers, and wondered - what are principal diffirences between two following schemes: They all share same amount of components, but when and why should be one ...
2
votes
0answers
512 views

Conduction angle in three-phase rectifier

In a standard three-phase bridge rectifier, which consists of 6 diodes, each diode (or thyristor) conducts 120º of the full 360º period. I have built a synchronous rectifier (for research purposes), ...
1
vote
1answer
31 views

Operative Definitions of Memory in Circuits

I've been studying Memristors (non-ideal) and some related circuits depending on pinched hysteresis of the IV for use in memory. I'm still puzzled by the lack of general framework for what constitutes ...
1
vote
0answers
30 views

BJT Hre simulation problem

im having problems understanding the behavour of the hybrid parameter hre in the bjt AC model. im using the pi equivalent circuit to simulate the relation between hre and Ic (Dc value). i am not ...
1
vote
1answer
73 views

How do I determine the unknowns for this equation?

Suppose a series RLC circuit in series with a 12 V battery and a switch initially opened. R = 100 Ω, L = 100mH and C = 10uF. L and C are initially discharged. A t=0 the switch is closed. I want to ...
1
vote
0answers
58 views

BJTs drawing collector current from a limited current source

simulate this circuit – Schematic created using CircuitLab Let's make everything ideal by ignoring the voltage drops: Q1's allowed collector current is: 22.4 mA Q2's allowed collector current ...
0
votes
1answer
40 views

What does it mean that in a point Α of an electrical field the voltage is -7?

The title. I am really confused. Does it mean that you need to spend 7J of energy to move Q=1C from there to somewhere where V=0, does the Q you move matter? Does it mean you need to spend 7J to move ...
0
votes
1answer
52 views

Op-Amp Impdance Question

For the problem shown above since there is no current travelling through the input of the Op-Amp can we assume that the Op-Amp is acting ideally? And using this assumption can we ignore the output ...
0
votes
0answers
37 views

A circularly polarized EM wave is perfectly absorbed by any interface?

According to the Fresnel equations, the effective reflectivity of an arbitrarily polarized electromagnetic wave is given as: $$ \Gamma = \frac{\Gamma_p + \Gamma_s}{2} , $$ where \$\Gamma_p\$ and \$\...
0
votes
0answers
40 views

Algebraic Data Type

I understand the concept of algebraic data types, but I don't see in what context they are useful or when they would be beneficial. When should I consider using them and how are they useful in ...
0
votes
0answers
49 views

Type 1 surge protection: parallel or series?

Type 1 surge protection devices (SPDs) are installed at the outside edge of electric service, usually between the power meter and the meter base/socket, and protect the entire house. But how do they ...
0
votes
1answer
58 views

Isolated circuits: can their reference voltages (GNDs) be at the same potential?

Suppose there are two independent circuits isolated from each other. If they are isolated, the impedance is very high between them (ideally infinite) and there is no current flowing from one to the ...
0
votes
0answers
46 views

Understanding generator wear and rotor electrical measurements

I have a generator that I am attempting to fix, and I am getting readings that are out of spec on the rotor brushes. Per some instructional videos I found, I should be measuring 5V AC on the rotor ...
0
votes
0answers
82 views

Connecting capacitor to the ground and potentials question

I am a newbie trying to enter the world of electronics and currently struggling with getting a good grasp of basic concepts of electricity. I understand that electrons which usually produce the ...
0
votes
0answers
300 views

Cgs,Cgd capacitor in Mosfet/ problem with measurement unit

I am a little confused with this problem. I would like to ask if I have a Mosfet(in saturation)and I have find that Cgs=16fF and Coverlap = 0.5fF/um(this is given in the description of the exercise), ...
0
votes
0answers
1k views

Overdrive voltage and Early effect in MOSFET

Can anyone explain to me if there is the Early effect in MOS transistor then the Early effect affects the expression for VOV which is \$VOV=\sqrt{\frac{2ID}{kn'(W/L)}}\$?
0
votes
0answers
203 views

Nonlinear circuit v(i) function for I-V plot

I'm trying to understand how to theoretically derive the equation that could be used for plotting the I-V graph. The points of interest are Out + and ...