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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
Is fwd break over voltage is greater than reverse breakdown voltage i.e VboVbr?
forward breakover voltage is slightly smaller than reverse breakdown voltage
What is symbols of zener diode?
Usual symbol for diode is with a triangle - looking as an arrow hinged with a vertical line. Arrow head stands for anode for diode and line stands for its cathode.
To give the symbol for zener diode we simply replace the vertical line by letter Z which also symbolizes the first designer 'Zener'
A 3.5 digit LCD (or LED) is a 3 digit display with a partial fourth digit that displays only 1 or 0 (or blank).
Typical range is 000 to 1999, or 0000 to 1999.
Why diode logic gate is not suitable for cascading operation?
the pullup or pull down resistance in the diode logic gate makes it a high output resistance device.If u try to drive another diode logic gate with it the output voltage of the first gate will be affected by the resistance in the second gate.A diode logic gate should always drive a high input resistance input.
Why Si is used than Ge in semiconductor diode?
silicon diodes Cut in voltage is 0.7 V.but the Germanium cut in voltage is 0.3 V that's why .............
In telegraphy how you are using frequency shift keying?
Like in modems, you make digital zeros one frequency and digital ones another frequency.
What is the difference between constant current bias and current mirror circuit?
current mirror circuit produce more stability as compared to biased circuit.
Why is input waveform from a transformer altered from a pure sine wave?
The input waveform from a transformer is altered from a pure sine wave because the load is not purely resistive, meaning in this case that it is not "continuous". Many loads do not pull current "all the time" during each line cycle. A power supply, for instance, only pulls current when the filter capacitor is being charged by the rectifier. This is because the rectifier biases on to charge the capacitor to the peak value of the input waveform, then the capacitor discharges at a rate dependent on load while the rectifier is biased off, until the voltage intersects the next rising input wave. This means the current load on the transformer is actually pulsing on and off. (This is true for both linear and switching power supplies, although you can reduce the pulsing with appropriate inductance in the filter circuit and a more complex design.) Since the AC supply is not "perfect", i.e. having a Thevanin equivalent series resistance of more than zero ohms, along with cables that do not have zero ohms, along with transformers that are not "perfect", this pulsing current induces a pulsing deviation in the input AC waveform. This effect can be observed even without a transformer in the circuit, but transformers make it more measureable, because the transformers introduce additional "inperfection".
What is the diff bet mid rise and mid thread quantization in signal systems?
A quantizer with output as zero when input is zero s mid tread while one which shows change/ transitition in level at input 0 is mid riser
Why remove resister from circuit to measure resistance?
a meter uses its own supply to measure resistance. you dont have to remove the resistor from the circuit but you must isolate it from the circuit supply to get an accurate reading.
In many cases, the cost of the transmission medium is large compared to the cost of a single transmitter/receiver pair or a modulator/demodulator pair. If there is spare bandwidth, then the incremental cost of the transmission can be negligible. The new station pair is simply added to an unused sub channel. If there is no unused sub channel it may be possible to re divide the existing sub channels creating more sub channels with less bandwidth. If, on the other hand a new pair causes a complete new line to be added then the incremental cost if large indeed.
What is total voltage in a series circuits?
In a series circuit the total voltage is the sum of the voltage drops across all the component in series. When the voltage drops across each the individual components are added up, they will equal the supply (or applied) voltage.
What must occur before the current flows through a circuit?
As current is the rate of flow of electric charges
- As I=Q/t
so,there must be free electrons for the flow of electric current in a circuit.Then when voltage is applied at the terminals of circuit the free electrons acquire an average velocity called as drift velocity in the opposite direction to that of electric field (-E).Now the free electrons modify there random motion and a steady current begin to flow in a circuit.
When all parts of a circuit are compose of conducting materials the circuit is said to be?
When all parts of a circuit are composed of conducting materials, the circuit is said to be closed.
One condition could be a closed circuit, however it could be open if the components are not assembled or are assembled incorrectly.
When communicating with the tower which communication?
Tower! Maintenance One, at Taxiway Alpha, request permission to cross runway 12
What is narrow band FM and how a narrow band FM generate?
If the modulation index of FM is kept under 1, then the FM produced is regarded as narrow band FM. Lower the modulation index, lower the no. of significant sidebands are produced (with reference to bessel function). So lower the no. of significant sideband, lowerer will be the bandwidth of the resulting FM prduced.
Sometimes, Narrow Band FM is regarded as, when the significant energy in FM occupies the same bandwidth as ordinary AM with the same modulating signal.
it provides a way to calculate the time profile of charge collected on a electrode based on the geometry of the electrode and the motion of a charge distribution near the electrode. It basically determines the waveform (pulse shape) collected by an electrode due to the presence of a drifing charge, as would happen in, say, a solid state particle physics detector.
What is the definition of equivalent resistance?
Equivalent series resistance (ESR) is an effective resistance that is used to describe the resistive parts of the impedance of certain electrical components.
Slew rate is found by SR = 2*pi*f*V, which f = frequency of signal, V = peak voltage of signal. After you find the slew rate Bom(full power bandwith) = SR / 2piV(pp). So in your case Bom = SR / 2*pi*5Vpp and it is always expressed in units of Hz.
