Questions tagged [math-notation]
The math-notation tag has no usage guidance.
14
questions
2
votes
2answers
44 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\$ ...
0
votes
3answers
136 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?
0
votes
2answers
104 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"...
0
votes
1answer
138 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
votes
1answer
40 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 ...
11
votes
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
158 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
votes
1answer
473 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 ...
1
vote
1answer
172 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
0
votes
1answer
105 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
votes
5answers
28k 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
votes
1answer
78 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 ...
12
votes
3answers
6k 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 ...
0
votes
2answers
108 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 ...
