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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

Why DC-DC converter is used in telecommunication power supply instead of inverter?

DC-DC conversion offers the advantage of a bifurcated power source. AC can be rectified and filtered to supply power under normal conditions at say, 17VDC fed to a 9VDC regulator to power the circuit. A 12VDC battery can serve as an alternate feed to the circuit for times when the AC source fails -- and it is connected to the same 9VDC regulator. Another benefit of DC-DC conversion is isolation to the circuit from noisy events.

What could be causing frequency interference at 101.1 FM on a plug-in home radio?

There are at least 50 different possible sources of perceived interference to an FM radio.

Most likely is electrical noise from a nearby motor, fluorescent light fixture, or light dimmer.

That's my opinion; I could be wrong.

Minimum Number of NAND gates required to realize the function AB?

A&B = ((A&B)')'

So two, it would go

a - |

==NAND--=NAND--

b - |

By using two NAND gates back-to-back, you can create a normal AND gate.

How are - Y is transmitted in colour TV?

A: A TV has three guns one is red blue and green with these basic colors all colors can be manufactured by mixing the colors. Of course black as we see it as color is actually the absence of all colors

What is the IR Infrared blaster or IR Controller is used to?

An infrared blaster (or IR blaster) is a device that emulates an infrared remote control to autonomously control a device that is normally controlled only by remote control key presses.IR Blaster is used to change the channel .

What is meant by crease resistant clothes?

Basically this means that the clothes are less likely to wrinkle as compared to untreated fabrics.

What is the meaning of TO220 package?

A: That is a packaging standard of the part. TO3 ,TO18 all refers to packaging standard that manufacturers use to make their part to conform to a standard.

Can instrument transformers be used to extend the range of a moving coil voltmeter?

Not directly, as MC instruments are direct-current instruments, whereas instrument transformers only work on a.c.

Define the operating point of a transistor how it is stabilized and why it should be stabilized?

The operating point of a device, also known as bias point, quiescent point, or Q-point, is the point on the output characteristics that shows the DC collector-emitter voltage (Vce) and the collector current (Ic) with no input signal applied. The term is normally used in connection with devices such as transistors.

Why it is said to be negative resistance region?

A negative resistance region is where the current goes up while the voltage goes down, or vice versa. This is a characteristic of the esaki or tunnel diode, when it is in its tunnel region.

Control diagrame of a capacitor bank and why you use capacitor banks?

---- Capacitor banks used to improve power factor(lagging) of a circuit:: This is necessary since it causes saving in power and electricity bill in following ways: 1) As p.f rises, circuit currnt decreases and hence I2R losses reduce 2) Var consumption reduces There is no tool provided here to draw the ckt diagram:: U take on PFC(power factor correction bus), then connect switch fuse, then HRC fuse, then Contactor, then overload relay and finally the capacitor bank

What is Alpha and beta keratin in hairdressing?

Keratin is a tough, fibrous protein. There are two types of keratin: alpha- and beta-keratin. Alpha-keratin is softer and is found only in mammals.

What is the dB rating for pain threshold?

If you mean the sound pressure level that causes pain, it is about 120 dB SPL.

What is piecewise linear model?

A piecewise linear (PWL) model can be used to simplify a problem, by replacing a complex model with on that is made up of simpler (linear) pieces. For example, the IV curve for a diode is Id = Is( exp(Vd/n*Vt) - 1). Quite messy. We can instead represent the curve by two pieces. One where the current is zero from 0V, to arround 0.5-0.7V. From here, we approximate the exponential curve with a linear relationship. This linear region is typically fixed on a point on the exponential curve known as the operating point, Q. See link.

How do you troubleshoot generator that fails to supply ac voltage?

You first use the schematic diagram in the equipment service manual to understand the flow of the power and signals in the generator.

The first thing to check is all of the power supply voltages. If one is missing, the generator can fail in such a way as to produce no output.

Then you can use an oscilloscope to trace the problem backwards, from the output connector of the generator to to the source of the signal generation.

What is the floating input in IC?

I believe what you are referencing is when a pin to an IC is left with no connection. Depending on the application, often an input(s) or an output(s) is not used. In such a scenario it is good practice, and in the case of CMOS devices necessary, to tie the unused pin(s) to logic high or low using pull-up or pull-down resistors. The choice of tying to high or low will be dictated by the application and the IC's data sheet will offer guidance.

What is the block diagram of Analog to digital converter?

Analog signals are converted into digital signals through the following steps:

  1. The analog signal passes through a sample and hold circuit which samples the signal at sampling instants.
  2. After sampling, the signal is quantized
  3. Ans lastly it is encoded