Questions tagged [math-notation]
The math-notation tag has no usage guidance.
17
questions
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0answers
27 views
What is nominal SNR in Massive MIMO?
I have read a couple papers that mention nominal SNR in Massive MIMO. In the places where I have seen it, it says it is the SNR of the User when M = K = 1. This means that it is the SNR when the the ...
1
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1answer
55 views
HSpice Manuals/Handbooks. What does Þ mean in the equations?
I'm working with the HSPICE MOSFET Models Manual for a university project.
In some equations there's this \$Þ\$ symbol. For example from an equation regarding the Shichman-Hodges Model:
$$
W_\text{eff}...
2
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0answers
58 views
Need help understanding notation in mathematical optimization equation?
I have been reading the research paper ["Distributed Joint Power, Association and Flight Control for Massive-MIMO self-Organizing Flying Drones"][1](Paper is from IEEE so it might be stuck behind a ...
2
votes
2answers
55 views
Current Notation in BJT
We are currently studying BJTs in electronics I and I am a bit confused on the notation of the current, specifically the collector current here. Throughout this chapter they will swap \$I\$ and \$i\$ ...
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3answers
478 views
What does \$x^*(t)=x(t)\$ mean in signals and systems?
I am often seeing this notation \$x^*(t)=x(t)\$ or similar but I cannot remember when I saw it the first time and I cannot find anywhere that explains the meaning of that notation. What does it mean?
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2answers
114 views
Mathematical therefore symbol (∴) needed for documenting circuit analysis calculations [closed]
When doing circuit analysis calculations I use the mathematical therefore symbol in my calculations and need to document my iterations to support my analysis. There is no ASCII code for the "therefore"...
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1answer
296 views
DC Analysis of Transistor Circuits - Double vertical line symbol
I have stumbled twice across this symbol || being used in the analysis of transistor circuits.
An example can be seen at this address: http://www....
0
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1answer
42 views
Notation for switches in ladder notation
I was reading https://www.allaboutcircuits.com/textbook/digital/chpt-10/monostable-multivibrators/,
and at the bottom of the page it has
I read their page on switch notation, but it did not say what ...
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3answers
4k views
Do square wave exist?
If we send a square waveform through an antenna, will we get square electromagnetic waves with electric and magnetic fields looking like squares?
Also, since there is an abrupt/almost jump in ...
1
vote
1answer
193 views
How to convert A/m to dBμA/m?
Lets say I have -2 dBμA/m as a limit.
How do I convert the magnetic field strength in A/m to dBμA/m? Is it as follows?
$$20\cdot \log(\frac{ |H| }{10^{-6}})$$
Thank you!
0
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1answer
587 views
Complex reactance formula explanation
Can someone explain the math behind the following relationships between the equalities in a capacitor's reactance?
$$X_C = \frac{1}{2\pi f C} = \frac{-j}{\omega C} = \frac{1}{j \omega C}$$
For ...
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1answer
192 views
What notation is this? (Boolean/Logic Function)
I've come across these questions. What notation is being used in the 2nd and 3rd question?
Thanks
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1answer
107 views
DT Ramp Signal Summation Notation Help?
I cannot understand how the summation range has changed via substitution of m.
EDIT:
Full problem with solution (for context):
25
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5answers
33k views
What is a “100R” resistor?
Sometimes I see references to "R" resistors. For example:
Obviously the 100 refers to 100 Ohms. What does 100R mean?
0
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1answer
79 views
negative powers 8051
I am attempting to create a calculator using Keil C51 compiling for a DS89c450 target device, but I have run into an obstacle with regards to negative powers. The compiler keeps returning errors when ...
13
votes
3answers
7k views
V/I uppercase/lowercase convention?
Is there any standard in industry for using uppercase or lowercase for V and I in circuit diagrams? I ask this because my book seems to switch back and forth between the two without any rhyme or ...
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2answers
114 views
Algebraic Notation for Circuits
When dealing with a circuit diagram of some type, a fairly typical procedure for simplifying the circuit is to redraw the circuit diagram a number of times, each time performing one or more ...
