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
What is 12MHZ crystal oscillator?
An oscillator is something that produces an output that repeats regularly. In the electronics field this will be an electrical waveform, often but not always a sine wave.
The most important property of an oscillator is its frequency : the rate at which the output repeats. This is measured in Hertz (Hz for short). One Hertz is one repetition (aka cycle) per second. One MegaHertz (MHz) is one million repetitions per second.
One of the problems in designing a high quality oscillator is maintaining the output frequency at the value required. One method is to control it by a quartz crystal; this is cut so that it vibrates mechanically at the design frequency, and is coupled to the electronics by the piezo-electric effect.
A 12 MHz crystal oscillator is an electronic circuit, whose output frequency is controlled by a quartz crystal to repeat 12 million times per second.
(Note. Oscillators don't have to be electronic. Other examples are a guitar string, a flute or a pendulum. An electronic oscillator is the only one that can be crystal controlled.)
Why LC oscillators are not used for low frequency?
They are not suitable for use as extremely low-frequency oscillators because the inductors and capacitors would be large in size, heavy, and costly to manufacture.
In a parallel circuit adding more bulbs will increase?
It will decrease the effective load resistance across the power supply terminals,
increase the total current through the load, and increase the total power required
to be supplied by the power supply.
How the envelope detector converts a 455 khz am signal to the message signal?
The diode flips the entire signal to the positive region like a rectifier. Then the parallel rc combination is kept charged or discharged by the carrier frequency, 455kHz. Since the Signal sits on top of the carrier, the output is the original sent signal with some ripple distortion, this can be taken care of with a simple lowpass rc filter
What is the need for fourier transform in analog signal processing?
The fourier transform is used in analog signal processing in order to convert from time domain to frequency domain and back. By doing this, it is easier to implement filters, shifters, compression, etc.
Is zener diode an ideal current source?
A: An ideal current source can be defined as a short with immense current capabilities A zener has no such capabilities
Applications of dual port ram?
The dual port RAM technology is used in the video RAM (VRAM). This allows a CPU to draw out image from the video memory at the same time the video hardware is reading it out to a screen
Why digital camera is an example of an close loop control system?
I dont know
hello i no nothing about this but i think the work because its made out of baterys and well its digital
Is base emitter circuit and common base amplifier same?
No the base emitter circuit is not the same as a common base circuit. The three BJT circuits all have the base emitter circuit. Wheter each terminal is common to both inputs and outputs of the circuit determines the type of transistor configuration.Henry Lee Everson PE;229-560-9769
a sense amplifier is used to convert a weak signal indicating the state of a computer memory cell into a strong enough signal to latch into a buffer register that the computer can read.
early computers used them on electrostatic and magnetic core memory. modern computers have them built into DRAM chips directly, so computer designers don't even usually have to think about them anymore.
Is a sine wave a symmetrical waveform?
Since a sine wave is described by the trigonometric sin(x) function, which is symmetrical, the sine wave is also symmetrical, unless there is a DC bias, in which case it is not. (It depends on your definition of symmetry)
Which filter do you use to remove pulsations from a power supply output?
There is no answer to this. If a power supply pulsates, what frequency, etc. If a power output needs filtering there are oodles of ways to do it depending on the desired result and the starting conditions. A starting point is a big capacitor.
The voltage drop in each resistance is?
V=IR by ohms law.
Voltage across the resistor is the product of current flowing and resistance of the conductor at constant temperature.
Why is it necessary to use an ESD bracelet when you work inside a computer case?
An Electro Static Discharge bracelet stops you from giving dangerous static charges to delicate components.
Under what situation does a flip-flop become in the toggle condition?
A flip flop being in toggle mode means the output of the flip flop keeps changing like a clock pulse being 1,0,1,0,1,0...
If we are using a jk flip flop and we tie the two inputs namely jand k together and send an input then we would find the output q or q(bar) to be toggling.
Is a transformer one source of constant electric current?
A; Terminology is not correct a transformer is not really a source but rather a device to transform one source of power to some power that can be used as required minus efficiency of power transfer
What does aeronautical engineering entail?
Aeronautical engineering would entail design and production of aircraft, modifications (which always happen ) and maintenance of aircraft.
The 74xx series of integrated circuits use TTL technology. (Transistor Transistor Logic). They work on 5v power supply, and draw a larger current. The MC type chips are CMOS. (Complementary Metal Oxide Silicon) they work off a more varied voltage range, 5v - 18v and draw less current than TTL. Other different numbers will relate to the package design and speed of operation.
What differencess between one's complement and two's complement?
one's complement is a bitwise complement of a binary number. (ie, 1 becomes 0 and 0 becomes 1)
A one's complement isn't really used as much as a two's complement.
A two's complement is used in a system where the larges bit in a binary number represents a negative number. so the bits for a 4 bit number would have the values of (from right to left):
-8, 4, 2, 1
this allows you to represent any number from -8 (1000) to positive 7 (0111)
To find the two's complement of a number, you take the one's complement, and then add 1.
This significant because if a computer wants to subtract two numbers, it simply takes the two's complement of the second number and adds them together.
More significance arises in digital circuits when constructing circuits using only nand/nor gates, as these perform slightly faster than and/or gates.
The only breakers that allow any adjustment at all are usually three phase and used on motor starting. These types of breakers have overload rated trips installed into them. The breaker has to be sized by code to 250% of the motors full load amperage. The adjustment is in the time that the breaker will hold the 250% overload before tripping. The draw back is that the longer the time for the motor to start, the quicker the motor will heat up. It is the prolonged heat that finally destroys the insulation on the motor's winding and will finally lead to a shorting of the windings to ground or to themselves.
What products does The Source by Circuit City sell?
The Source by Circuit City is a Canadian electronic retailer. Some of the products sold by The Source are computers, clock radios, cellular phones, DVD players and traditional telephones.
