Questions tagged [math-notation]

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What does the double vertical bar mean here?

I'm reading on air "gap impedance" and came across this equation from these notes on the topic. http://web.mit.edu/6.685/www/chapter8.pdf (see page 7). The article defines this equation as: ...
LivesayEngineer's user avatar
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1 answer
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Opposite of reflection coefficient

The reflection coefficient (in circuits, for example) is generally given the symbol Gamma (\$\Gamma\$). What is the symbol given for the pass or transmission coefficient \$1-\Gamma\$? I've usually ...
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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}...
Sky V's user avatar
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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 ...
Gabe Skidmore's user avatar
2 votes
2 answers
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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\$ ...
ModularMan's user avatar
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3 answers
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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?
J. Doe's user avatar
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2 answers
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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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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....
user3728501's user avatar
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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 ...
ions me's user avatar
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3 answers
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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 ...
Vishwa Mithra Tatta's user avatar
1 vote
1 answer
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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!
Defindun's user avatar
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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 ...
E. l4d3's user avatar
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1 answer
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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
Nabeel Farooqui's user avatar
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1 answer
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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):
howland12's user avatar
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31 votes
5 answers
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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?
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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 ...
TheSoundMan's user avatar
14 votes
3 answers
10k 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 ...
Austin's user avatar
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2 answers
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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 ...
AJMansfield's user avatar