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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
the difference between the source freq. and the reference freq
What is the reason of the phase shift in CE?
... in CE config.. as Vo=Vcc-Ic Rc nw as Vcc is const. v cn say Vo is directly proportional 2 (const.-Ic Rc) so nw when d base voltage is increased Ib will inc. thus, Ic will inc. cuz Ic=beta Ib thus Ic Rc drop increases... as Vo is prop 2 (const.-Ic Rc) thus, Vo will decrease for inc. in Ic...thus d curve for d +ve half cycle in which Ib is increasing drawn in 180 deg phase showing Vo is dec. n vice versa 4 -ve half cycle...
nw in CC... as d o/p is taken frm emitter... Vo= Ie Re so der's no -ve sign..n for d +ve cycle Ie will incr(dat's leakage current) as der's no-ve sign it'll b in phase wid i/p..hence no phase shift as leakage current doesnt incr. so much thus,d o/p voltage Ie Re doesnt inc much thus, d o/p doesnt amplify much thus dis config knwn as emiter follower...
nw in CB,... d I/P is appiled at emitter n o/p is taken frm collector... so, 4 d +ve half cycle d EB junc will b less FB thus causing dec in Ib n thus, in Ic... so dec in Ic causes inc. in o/p voltage(cuz Vo=const.-Ic Rc)..n during -ve half cycle d junc will b more FB(inc in Ic) so o/p voltage will b decreasing..hence der's no phase shift...
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shrey.dhingra51@gmail.com
4000 yrs
Volts peak is equals to dc volts?
"Voltage peak" is generally used to denote the maximum(amplitude) of AC voltage supply. It can not be approximated as dc value. The closest approximation one can make for dc value of a ac supply is the RMS(root mean square) value of the voltage. So that the ohmic loss caused by the given AC voltage supply is equivalent to that caused by a dc supply having value equal to the RMS of this AC supply (for given impedance & time).
Fast RF is a type of radio frequency transmission for sending data from a wireless input device (e.g. a cordless mouse) to a computer via attached receiver. Theoretically, Fast RF can be done at different transmission frequencies (i.e. the size of the radio wave, e.g. 2.4 gHz, etc.) but its main aspect is that it transmits data 125 times per second, much faster than wireless technologies prior to the creation of Fast RF standards. A standard USB port cannot read/understand more than 125 transmissions, so fast RF is as fast as it can handle (I presume USB 2.0 can go faster, as it's higher bandwidth, but don't know for sure). Short and sweet, if you want a wireless mouse and are using a USB 1 port or hub, Fast RF is as good as you'll see so far as speed is concerned, because it matches the maximum data rate of the USB port.
What are the 20 best electrical and electronic engineering European universities?
You ask a bit much.
The English language master program at TU Dresden in organic and molecular electronics is certainly outstanding. It's a so called German "university of excellence", widely called elite university within Germany, and Dresden represents Europe's biggest cluster of microelectronics. It's ahead in material sciences.
The "CHE University Ranking 2012/13" sees TU in the lead among German universities in electronics and information technology.
What are the applications of jfet?
• High Input Impedance Amplifier.
• Low-Noise Amplifier.
• Differential Amplifier.
• Constant Current Source.
• Analog Switch or Gate.
• Voltage Controlled Resistor.
• JFET as a Switch
• JFET as a Chopper
• JFET as a Current source
• JFET as a Amplifier
• JFET as a Buffer
15 uses of cathode ray oscilloscope?
five possible uses :
* Calibrate an oscillator
* Compare two frequency generators
* Phase shift determination b/w V and I in any CR circuit
* study Beats phenomenon
* study Lisajjous figures
CMRR is common mode rejection ratio. it is the ratio of Differential gain to common mode gain. CMRR=Ad/Ac
INDONET
India's first data communication and computer network was started in March 1986 by CMC Ltd. It was launched as a solution to the growing need for providing timely well processed data to various institutions. In the First phase, they have mainly networked Mumbai, Calcutta and Chennai. Later, Delhi and Hyderabad were also linked as additional stations. INDONET presently has an international gateway which provides access to world wide pocket switched networks like USA's Global Networks Systems (GNS) and Internet.
What is the difference between a wave and signal?
1.wave is a three dimensional object where as signal is a two dimensional object
A 480-volt circuit has an impedace of 60 ohms what is the current?
480 volts and 60ohm impedence
current = volt/impedence
current=480/60
current=8ampeares
State the application of RC coupled amplifier?
To increase the power gain ,high input impedance,low output impedance,and increase the weaken signal
What does a transducer look like?
A transducer will take different appearances depending on the specific type. This is an electronic device that is used to convert one form of energy into another. A good example of a transducer is a microphone.
What is a combination circuit?
It was mentioned that there are two different ways to connect two or more electrical devices together in a circuit. They can be connected by means of series connections or by means of parallel connections. When all the devices in a circuit are connected by series connections, then the circuit is referred to as a series circuit. When all the devices in a circuit are connected by parallel connections, then the circuit is referred to as a parallel circuit. A third type of circuit involves the dual use of series and parallel connections in a circuit; such circuits are referred to as compound circuits or combination circuits. The circuit depicted at the right is an example of the use of both series and parallel connections within the same circuit. In this case, light bulbs A and B are connected by parallel connections and light bulbs C and D are connected by series connections. This is an example of a combination circuit
By Engineer
Muhammad Zaheer Meer GMS
What is third harmonics in ac circuits?
It depends on the frequency in the expression of the function. A third harmonic would mean that the frequency is 3 omega, thus the circuit will consist only of the quantities that have 3 omega in the expression. For example if you have :
e(t)=5sin(3ωt+π/4) and is(t)=7sin(ωt+π/4), in the first harmonic the e(t) quantity
will disappear from the circuit while in the third harmonic the is(t) quantity will be neglected.
For a given hfe calculate hfc in electronic circuits?
how to calculate the value of hfc for a given hfe
A phase current is the current passing through a phase, whereas a line current is the current flowing through a line.
