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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
Harmonics is multiple of fundamental frequency. Spurious is not related to fundamental frequency but it is observed at the output spectrum. Harmonics are generated due to non-linearity of the device. Harmonics can generate spurious. As an example harmonics can produce resonance with mechanical box internal structure and can generate spurious.
Harmonics generally generated from TCXO & frequency multipliers. If amplifier is non-linear, this will also generate harmonics. But harmonics very near to carrier generally generates interference to modulating signals. We design final power amplifier as a class AB amplifier to get more output power and better efficiency and also to minimize output power variation with temperature. Since it is non linear amplifier it generates harmonics but it will be very far from carrier and can be filtered easily.
See the link for detail :- http://harshit.org/spurious and harmonics.pdf
Is there an electric enigine powered Tahoe?
There is a Hybrid Tahoe. It's got a gasoline engine and an electric motor. As far as a Tahoe that doesn't have a gas engine...no.
Would you tell us what attracts you to a career with us?
If you go to a job interview you might be asked to tell them what attracts you to a career with them. You could talk about how you admire the company.
What is holding current in a solid state relay?
Not a lot! If you look for 'Thyristor' or Triac devices, you will see anything from a milliamp upto some tens of milliamps. Once the device is on, the gate drive may be removed, effectivley no holding current. (note that for AC circuits, the gate will need to be re-applied at the start of every half cycle!. For DC, it just stays on.
How does ignitor in sodium vapour lamp work?
Similiar to a flourescent light. The ignitor provides a high voltage potential to excite the sodium gas within the bulb.
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How many bits are in a kilobyte?
This is actually one of the most commonly misunderstood terms.
First off, there are 1000 bytes (B) in a kilobyte (kB). kilobytes, megabytes, etc. are measured in base 10.
Then, there are 8 bits in a byte. So altogether, there are 8000 bits or 8 kilobits (kbit) in a kilobyte.
The base 2 notation is known as a kilobinary byte or kibibyte (KiB) and is equal to 1024 bytes. The numbers are close but the terms are often misused.
There is an article from NIST on the correct notations attached to this answer.
Difference between bipolar junction transistor amplifier and field effect transistor amplifier?
Bipolar transistors are so named because in which holes & electrones takes part in conduction.as opposed to unipolar transistors, such as field-effect transistors, in which only one type of Majority carrier takes part in conduction. FET Advantage over BJT FET requires vertually no input corrent and gives extreamly high input resistance.
FET's have a 4th source called a body and are a little bit more complicated the simple emitter, base, and collector of BJT's. they are more semiconductor and can't handle as much power as BJT.
http://en.wikipedia.org/wiki/Field_effect_transistor
http://en.wikipedia.org/wiki/Bipolar_junction_transistor
Amplitude modulation and frequency modulation range in India?
Normal frequency range for amplitude modulation is 550kHz to 1610kHz
A conduit is a set of closed canalization circular or not that assures the free passage of conductors and ensures their continuous protection.
Advantages of fpga over dsp and asic?
FPGA have less density. Moreover , it is gaining more market share due to it's reasonable NRE (Non Recurrent Engineering) cost and fast time to implement and manufacture in the market.
What is difference between transistor and amplifier?
A transistor is an electronic component. By itself it has little use. An amplifier is a complete, functional circuit, generally made up of several components. A transistor can be a component part of an amplifier, however an amplifier may be constructed without any transistors (using vacuum tubes instead, for instance).
What is the meaning Getting on board?
Getting on board means someone is asking you to join in with them. This is a common term used in group settings.
Avalanche photodiodes (APDs) are photo detectors that can be regarded as the semiconductor analog to photomultiplier's. By applying a high reverse bias voltage (typically 100-200 V in silicon), APDs show an internal current gain effect (around 100) due to impact ionization (avalanche effect). However, some silicon APDs employ alternative doping and beveling techniques compared to traditional APDs that allow greater voltage to be applied (> 1500 V) before breakdown is reached and hence a greater operating gain (> 1000). In general, the higher the reverse voltage the higher the gain. Among the various expressions for the APD multiplication factor (M), an instructive expression is given by the formula :
What is the shape of the magnetic field that surrounds a current carrying wire?
The shape of the magnetic field created by current flow in a wire will be circular around the wire. The magnetic lines of force "surround" or "wrap around" the wire according to the left hand rule. Grab the wire with your left hand with your thumb extended and pointing in the direction the electrons are flowing. The fingers will be wrapping around the wire in the direction of the magnetic field. Look at the wire "head on" and picture the electrons "coming at you" as you look. The magnetic lines of force will circle around the wire in a clockwise direction. Grab the wire with your left hand as you look "into" that wire and look at your fingers. Clockwise. The magnetic lines of force "circle" the conductor in closed rings. temptress_skkk: In my textbook, it says the "right-hand rule" instead of the "left-hand rule" but it's basically the same thing, only the current is going the opposite way with your right hand instead of your left hand being in its place. it is the right hand rule of thumb not the left hand. and the magnetics line will fade as the square of the distance.
What is the difference between Retrievable and Retractable corrosion probes?
Retrievable corrosion probes is meant for high pressure (3600 to 6000 psig).
Retractable corrosion probes is meant for pressure about 1500 psig.
Main factor which differ De mosfet from an e only mosfet?
An e only(enhancement) ÊMOSFET is off at zero gate-source voltage. Meanwhile, a de (depletion enhancement)ÊMOSFET is on at zero gate-source voltage.
How a transistor transfers resistance?
The input current of transistor is approximately equal to output current .Suppose in common base configuration the emmiter current is approximately equal to collector current if neglect the very small value of bae current.Even though the input resistance is not equal to output resistance,the currents are same ,so we can reliase that the transistor transfers resistance to get same currents at both ends.
Magnetic flux density is measured by q meter or ac voltmeter or hall probe or energy meter?
Hall Probe. When the Hall Probe is held so that the magnetic field lines are passing at right angles through the sensor of the probe, the meter gives a reading of the value of magnetic flux density (B).
What is cross polarization isolation?
Cross polarisation isolation or Cross Polarisation Discrinimation (XPD) is the difference in dB of received signal level (RSL) at the receiver when in turn, the transmitter has the same and different polarisation with the receiver. A antenna with this greater value is prefered.
This information is useful in microwace design when in the same area we can use the same frequency with different polarisation . For example:
TX1 : vertical polarisation ---> RX1 : Vertical pol.
TX2 : horizontal pol. ---> RX2 : horizontal pol.
They all operate in the same frequency. The signal from TX1 , TX2 will be separated corresponding to the value of XPD.
What happens to a signal when transmitted over long distances?
the signal goes out of sink due to refraction
How do you calculate short circuit current?
A short circuit = 0 ohm, from this one can use ohms law to calculate the current, that is E/R voltage divided by resistance as in this instance your resistance is zero and you can't divide by zero so your current will be infinit. In other words if your power supply is large enough to supply 200 amp, your current on a short circuit will be 200 amp.
