what does the circle on the transistor symbol represent?
607704
Hi,\n\nThe circle is also called envelope or enclosure. It has the functions defined here: http://www.kodkodkod.com/files/symbolenvelope.htm\n\nFor a BJT transistor, the envelope can serve the purposes mentioned in 1) 2) and 4). However, it is not really necessary to have the "circle" if 1),2) and 4) are not required. Indeed in many college textbooks and research publications in IEEE, people just omit the circle.\n\nPlease bear in mind that circuit symbol is the mean to represent the circuit in a readable way. Therefore, if the circle helps you to present the circuit, then use it (e.g. if you have bad hand drawing). If the circle makes your diagram more confusing (e.g. you have many transistors), then omit it.\n\nKodKodKod Learning Consulting -Here you get the answers!\nhttp://www.kodkodkod.com\nTo submit questions: http://www.kodkodkod.com/index_files/submitquestion.htm
277678
well. it looks tiny to all of us, but infact it has millions of transistors arranged in particular circuitry within itself doing the job. \n\nthis link will help you in detail\nhttp://computer.howstuffworks.com/microprocessor.htm
632038
This is a tuning chip for an automobile to make it run faster. It is actually an IAT resistor chip, with IAT standing for "Intake Air Temperature". "Widerstand" is German for "resistor" or "resistance". Take a look at the link below.
334689
As much as i know, all IC's have certain numbers. There are many many IC's that are performing many many different jobs. so in order to recongize which IC is doing what job it has a different number than a IC doing a different job. For example a IC used in a radio can not do the job of a IC used in TV and similarly a IC used in TV cannot do the job for a IC in radio. hence they have different numbers . so if a IC is damagerd it can only be replced by another IC of the same number.\nfor example  \n 74LS xxx  is transistor transistor logic. so if you take a microscope and look into this kind of IC you will find a lot of transistors. \nand  74HCxxx  OR Cd40xxx  series of IC are MOSFET based and if you take a microscope and look deep into these series u will find alot of MOSFET's .\nthankyou/
623671
There's both an explanation as well as a diagram\nof a 2 input AND gate built just from transistors at:\n\nhttp://tams-www.informatik.uni-hamburg.de/applets/cmos/cmosdemo.html
934040
concentric circles are circles within circles, think target symbol
273057
The cross symbol could denote matter, and the u shaped symbol could be denoting a boat or a convergence.  Perhaps it is simply stating that the can is a conveyance of matter?  OR it is saying the can is a matter boat.\n\nA more practical approach might be that it is simply an attention seeking, mnemonic activating device for marketing purposes.
356128
Its alt+3, and FYI Alt and a number is a way of printing orginal symbols from ASCII text, (first printer data kinda thing)
416521
e stands for the electronic
644077
The voltage at which the attractive forces between the capacitor plates overpowers the fasteners.\n\nTake a look\n\nwww.math.ubc.ca/~ward/papers_ps/memspap.pdf
6099
I may be living in the past but I see transistors every day.  The 2-diode analogy is pretty close to the mark.  They meet at the base, pointing in for PNP and out for NPN.  Check them that way with your multimeter set on diode setting.  If the reading is inconclusive you may have to de-solder them from the circuit.
43874
you can go to "inset" then "symbol" and find it there. Or  alt - 0153
489545
It is a symbol of the band HIM, they created it themselves. My guess would be that if you can find info on the band HIM then you will probably find why they created it and use it.  What it represents to them.
885973
EE/EB/HI  upside down on a calculator display.
963878
That would be a metal-oxide-semiconductor field-effect transistor.\n\nThree terminals are source, drain and gate.  The presence or absence of electric charge at the gate modulates the flow of current between source and drain.
644332
The website below has an image of the Pi symbol.\n\nHope this helps.
461173
Maybe in mathematics sqrt of -1 = i, but in electrical engineering it is j.\nIn electrical engineering and related fields, the imaginary unit is often written as j to avoid confusion with a changing current, traditionally denoted by i.\n\nThis represents the imaginary component of electronics which cannot be ignored. Phasor diagrams may help to explain this phenomenon. A phasor is a constant complex number representing the complex amplitude (magnitude and phase) of a sinusoidal function of time. It is usually expressed in exponential form. Phasors are used in engineering to simplify computations involving sinusoids, where they can often reduce a differential equation problem to an algebraic one.