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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 XOR and XNOR gate is not known as universal gates?

All other logic gates can be made using XOR and XNOR, but to get NOT, you need to do (input) XOR 1 or (input) XNOR 0, but with NAND, you don't need 1: (input) NAND (input).

Why negative supply is more prefer then positive supply?

A: actually it is the other way around usually negative voltage is a biasing scheme. Most design are begun with a positive voltage in mind. Not that a negative voltage will not work it is just people think positive

What is difference between source encoder and channel encoder?

A source encoder converts client input to a binary stream. This is typically done by sampling an analog input, digitizing the samples and coding them into a binary stream. A common component that does all this is called a Codec.

A channel encoder converts a binary stream to an analog signal that can be transmitted over distances as tones, radio waves and/or light. The channel encoder can take a number of bits from the bitstream at a time to create a multibit symbol. The symbols can then be converted to an analog signal for transmission. By transmitting symbols that represent multiple bits, more data can be sent without violating the Nyquist criteria. However, the number of bits that can be coded into a symbol is limited by the SNR as in Shannon's law. A common component that does all this is called a Modem.

What does IP3 mean in RF?

IP3 means 3rd-order intermodulation products. When an amplifier is not perfectly linear it distorts the incoming waveform and if signals are input at two frequencies f1 and f2 the basic intermodulation products are at the two frequencies f1±f2.

3rd-order products are f1±2f2 and 2f1±f2. This gives problems because when f1 and f2 are almost equal, there are 3rd-order products that are close to them in frequency and therefore difficult to filter out.

Do you test a pcm with an analog meter?

You want to use a digital. Faster reacting to fluctuations as with O2S and HO2s that constantly switch between hi and low readings ,and other millivolt circuits, and even the need to check resistance up to 40,000 ohms in some cases just to ensure components in a circuit are operating correctly to achieve the desired operation in the pcm, ecm, ecu or whatever terminology is applied.

What is intermediate transformer?

I suspect you mean an "Intermediate Frequency transformer", or IF transformer.

Superheterodyne (Or superhet) receivers convert the frequency of an incoming signal to a special frequency called the "Intermediate Frequency" or "IF". Most of the amplification takes place in the IF Amplifier which usually has several stages. Each of these stages is coupled to the next stage by a tuned transformer called an IF transformer.

For AM receivers, the Intermediate frequency is usually 455 KHz, and for FM receivers it is usually 10.7 MHz.

These transformers are usually about 20 turns of Litz wire on a plastic former with a dust-iron adjustable core. It sits in a little metal shield can.

How are collisions detected on an Ethernet network?

by comparinig the xmit line to the recieve line and look for differences

What is the maximum input voltage that could be used to ensure linear operation of the inverting and noninverting amplifier?

A: Linear operation has nothing to do with voltage. It is a function of voltage vs current at a particular load. Most transistors have a very linear parameters at low current but at hi current the linearity changes and for some transistor drastically. So choosing a transistor for amplification is different then from choosing for a switch application.

What is phase opposition disposition modulation?

For phase opposition disposition (POD) modulation all carrier waveforms above zero reference are in phase and are 180 out of phase with those below zero.

What were the advantages of a barge over an oxcart?

Barges offered several advantages over oxcarts, primarily in terms of capacity and efficiency. They could transport larger quantities of goods over water, reducing the need for multiple trips and enabling bulk shipments. Additionally, barges were less affected by rough terrain and could navigate longer distances without the physical strain on animals, making them a more reliable option for trade and transportation in many regions. Lastly, the use of waterways often allowed for faster travel compared to overland routes.

Why higher frequencies attenuate more than lower frequencies?

Perhaps because the medium more readily absorbs the higher energies of the upper harmonics. This might be related to the stiffness or elasticity of the medium, whatever it happens to be.

What are gap junctions?

are formed by a ringlike connexon which consist of six transmembrane proteins are arranged somewhat like the segment of an orange

How structure and function of computer are different.explain with example?

Structure means how different elements of computer are interlinked, how they are interrelated. While organization referes to operation of different elements of computers in a particular structure

What is the measured voltage across the 680 ohms resistor?

No one is going to be able to tell you that. You are looking for the measured voltage, so go and measure it. In any case, if you were just looking for the voltage it will depend on the circuit current. You can work it out using ohms law (Voltage = Current * Resistance).

How do you wire amp to 1 ohm load?

need more info but I'll give it a shot and hope i answer your question.

You will need one of the following to get your desired ohm load:

1- single voice coil at 1 ohms

2 - single voice coil at 2 ohms wired + to +, - to -

2 - dual voice coil at 4 ohm all wired + to +, - to - so that you only have 2

wires conected to the amp.

hope this helps.