0
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
How do you select the operating point for the amplifier?
selection of operating point is very important in the electronics circuit designing or construction of amplifiers
1. operating point is generally selected as the point of intersection of both DC and AC load lines.
2. they may also be chosen as the mid-point of DC load line if maximum symmetrical swing of the signal is desired
Is the current pass through parallel short resistance?
no.because current always try to flow trough low resistance path.as short circuit has low resistance current pass trough short circuit
How capacitor used in a timing circuit?
A capacitor relies on the time it takes for the voltage across it to reach a certain value. When it is fully discharged, it acts like a piece of copper wire. ie: it conducts. The voltage across it now is zero. When a voltage is applied to it, it begins to charge, and so the voltage measured across it's terminals increases. This takes time. How much time depends on the voltage applied resistor connected to it and the value of the capacitor.This voltage is then used to energies a relay, turn a transistor on, fire an SCR, and lots of other things.
When you short out a resistor in a parallel circuit why does the current lower?
The total resistance of a set of resistors in parallel is found by adding up the reciprocals of the resistance values, and then taking the reciprocal of the total. By removing a resistor the total current will lower. If you short out the parallel circuit as suggested it will take out the fuse that should be protecting the circuit.
AnswerShorting-out a resistor in a parallel circuit, will act to short out the entire circuit, therefore, significantly increasing, not lowering, the current! And, as the previous answer indicates, this short-circuit current will operate any protective devices, such as a fuse.
In a parallel circuit current does not lower but it will be increase if shorting-out one resistor in the two resistor parallel circuit, the circuit will become very low resistive and the larger current will flow through the short path.
Why coupling capacitor block DC in amplifier?
capacitors at input block dc and allows ac only. so absolute none of the dc enters the circuit. They are called decoupling capacitors or blocking caps.
-DANNY S
Can you apply thevenin's theorem in circuits having multisource?
yes. its trickier but it works fine.
Does the company American transistor toy corporation still exist?
I would like to know as well. I have an uncancelled stock certificate for 200 shares of the American Transistor Toy Corporation dated September 3, 1960. The company was incorporated in the state of New Jersey.
Should i wear a grounding strap when servicing a CRT monitor?
I would suggest not wearing one, because the CRT uses very high voltages which could potentially remain while you are servicing it. Grounding yourself will put you at a greater risk of serious shock. The parts in a CRT are generally not as likely to be static sensitive as many other electronic devices, so the need for a grounding strap is not as great. Also, before working with a CRT, do some research into other precautions you should take to avoid electric shock.
How does the veractor diode work?
They are usually used as voltage variable capacitors,not as diodes. The diode is made in such a way that when reverse biased (where the voltage across the diode is in the polarity where very little current flows) the capacitance varies considerably with the voltage across it. This action is usually used to make resonant Inductor-capacitor circuits have their resonant frequency dependent upon the "DC" voltage across them. For instance: A low frequncy signal, like Audio, is impressed across a veractor tuned resonant circuit to make a much higher frequency oscillator (at say an FM station frequency) vary its frequency in proportion to the amplitude of the "instantaneous" Audio signal. (at 100 MHz nominal oscillation frequency, the audio is like slowly moving "DC"). One can make a frequency modulated radio this way. (rather distorted; veractor characteristics of V across to C across are pretty non-linear).
These diodes are made by having one side of the "P-N" junction that forms the diode be very lightly doped. What this does is make the depletion region; the region where conductive carriers are pulled out by the reverse bias across the diode (where it doesn't conduct) change its width considerably more than usual. (all diodes have some of this voltage variability) This depletion width is non-conducting and acts like the dielectric of a capacitor. As the voltage across changes the width of the dielectric changes thus the capacitance across the device changes.
24VACRMS * 1.414 = 33.94VACPEAK
The unloaded filtered DC voltage is 33.94V
The unloaded unfiltered voltage will be a single polllarity AC voltage with a peak of 33.94V
What do you means of resister in embedded system?
in embedded system resister means, memory to store the data.
What are the advantage of the digital?
1)Digital Communication systems are simpler and cheaper. 2)Using data encryption only permitted user are allowed to detect the transmitted data. 3)Since in Digital Communication, channel coding is used, therefore a large amount of errors may be detected 4)Since transmitted signal is digital in nature, large amount of noise tolerance may be tolerated
Are amps constant in a parallel circuit?
The short answer is NO. PARALLEL circuits are those in which two or more physical branches (the wirings) are connected together at the endpoints of each branch. This means that each branch has the same voltage V applied to it (across it). Since each branch may have different types of components (the loads), the current in each branch can be different, since current I is the voltage V across a branch divided by the effective load resistance R, then I= V/R . Since the voltage across each branch is the same, if R varies in each branch then current I must vary in each branch.
A SERIAL circuit has the SAME current since it is formed by connecting the branches (components) together in a consecutive string so that the current flowing in one must be the same as the next. In this case then the voltage must be different across each component if the R of each component is different.
What diode is used as voltage controlled capacitor?
It is called a varactor or a varicap diode. Its capacitance varies nonlinearly with the reverse voltage applied to its terminals.
What is selection criteria for cpld and fpga?
Size, Complexity and Application of design will decide the selection(Mostly CPLDs are used in bootups).
What solenoids do to a logic combinational design?
nothing in electronic logic circuits.
relay logic circuits often use solenoids as the electromagnetic coils of the relays.
