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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
What sort of store is Circuit City?
Before closing in 2009 Circuit City was a electronics corporation retail outlet chain. They had 567 Circuit City superstores but now operate solely as an online electronics and media retailer.
How do monolithic ICs provide good thermal stability?
- all the parts in the IC were made together so they have nearly identical characteristics
- the parts are close together in the IC so are probably at nearly the same temperature
The three standard forms of analog amplifier biasing are:
- class A - the amplifier is biased in the center of its linear operating range, this is the most linear but least efficient type of amplifier (because the transistors or tubes are always conducting, even when there is no signal to ampliify).
- class B - the amplifier is biased at the cutoff point, this is an efficient amplifier but is only linear if operated as a push-pull amplifier (because the transistors or tubes are in cutoff and not conducting when there is no signal and through one half of every cycle, a class B push-pull amplifier has two sections that operate on alternate halves of the cycle).
- class C - the amplifier is biased in hard cutoff so that only the peaks of the input signal are amplified, this is the most efficient amplifier (because the transistors or tubes may be in cutoff and not conducting for more the 85% of the time) but it is not capable of linear amplification. An amplifier biased as class C is only suitable for use in RF transmitter power stages, where a resonant LC tank circuit will be excited into oscillation by the output of the amplifier and complete the missing parts of the cycle.
Partisan bias refers to the tendency of individuals, organizations, or media outlets to favor one political party or ideology over others, influencing how information is presented and interpreted. This bias can manifest in various ways, such as selective reporting, framing issues in a particular light, or emphasizing certain facts while downplaying others. As a result, it can lead to skewed perceptions and polarize public opinion, making it challenging for individuals to access balanced and objective information.
wattless current means that current by which no power is dissipated (Power=0).
What is different between digital and analog?
Consider this:
You want so signal your friend using a torch light. Now you might think there is only one way to signal to your friend by turning on and off the flashlight right? But actually there are more ways.
1) Turning on and off the flashlight
2) Dimming the torchlight and bringing it back to full shine
So here method 1) is the digital way to signal to your friend and method 2) is the analog way to signal to your friend.
Difference: In method one its either full signal or null as in case of digital signal 0 or 1
In method two there is always signal(torch is always glowing) but we are signaling by dimming the glow of light.
cheers,
...kam
In electronics, the term "digital" refers to circuits in which individual data are represented by a discrete set of voltages -- usually only two (i.e., either a "logic 1" or a "logic 0"). In this case, each datum is a binary entity called a bit. Data in the form of numbers other than 0 or 1 (e.g., 2, 365, 3.14159, etc.) are represented as patterns of bits.
In analog circuits, each datum is encoded as a continuous voltage within a range. Such circuits are widely used in such application areas as audio electronics, radio, motor control, etc.
Historically (c. 1960), analog computers were developed that competed with digital computers. However, digital circuits are at the heart of virtually all modern computers.
If there is less voltage across a resistor, there will also be less current.
As for the second question, I assume you mean two resistors in series. If the voltage or potential difference across one decreases, then the other one must increase, due to Kirchhof's Voltage Law: the total voltage across the two resistors must be equal to the voltage across the battery, which is usually assumed to be constant.
AnswerYou can think of voltage drops in terms of a water radiator central heating system. In order to drive water around all the radiators, there must be a difference in pressure across the entire system. But for water to flow through each, individual, radiator, there must also be a difference in pressure across its input and output orifices. The sum of these individual pressure difference must equal the pressure difference across the entire system.
If you now equate a pressure difference across an individual radiator with the voltage drop across a resistor, then the sum of the voltage drops across each resistor must equal the voltage across the entire circuit.
You should also realise that voltage does not 'slow down' current -it affects its magnitude (in amperes)
No, a tuner is not an amplifier. A tuner is a device that receives and decodes radio signals, allowing you to listen to broadcasted content. An amplifier, on the other hand, strengthens audio signals to drive speakers and enhance sound output. While some audio systems may combine both functions, they serve distinct purposes.
What is the significance of eta in diode current equation?
In the diode current equation, often represented as ( I = I_s (e^{\frac{qV}{n kT}} - 1) ), the parameter ( \eta ) (or ( n )) is the ideality factor. It accounts for the non-ideal behavior of real diodes compared to the ideal diode model, reflecting factors like recombination and generation of charge carriers within the depletion region. Values of ( \eta ) typically range from 1 to 2 for silicon diodes, influencing the diode's current response to voltage changes, and thus impacting its performance in circuits.
What will happen to the mobile if you put it in charger to much?
Good Mobile phones have built in overcharging protection built in. when battery reaches a maximum charging level, the current flowing through it reduces. once charging current flow reduces below a threshold level, a circuit completely cuts it, separating the charger from the mobile phone. Also, with current batteries, there is no longer the problem of having to run your battery down completely before charging. Previously, doing this would cause the available charge to shrink.
Differentiate between an analog and a digital electromagnetic signal?
1. Digital Signal is non-continuous signal where as analog is continuous signal
2. Digital signal contain only two value that is 0 or 1,or high or low where as analog contain all the values in it's time interval
3.Chance of attenuation in analog is more then digital signal
Difference between temporal redundancy and spatial redundancy?
The redundancy is nothing but the reduction.
The temporal locality is of relating to short time requirements.
And the spatial is of relating to over environment.
The redundancy occur in the images are of most common,so many techniques applied to overcome this. In image temporal redundancy is of abrupt transitions while in spatial it is of block based transitions.
Spatial is applied at minimum cost and temporal is at maximum cost.
Threshold values apply to temporal redundancy and the pixel comparison technique applies to spatial redundancy.
What size resistor to drop 12 vdc to 2vdc?
it is better to use zener diodes or transformators in order to drop 12 vdc to 2 vdc. If you do it with resistor you will waste you power.
Voltage formula for resistors in series V1+V2+........+Vn=Vtotal, so 2Vdc+i.R=12Vdc. Determine the current for you supplier and calculate the value of resistance.
What is the effect of frequency change on transmission losses?
Higher the frequency, higher the losses.
Define simply type of shift register?
There are several types of shift registers:
PISO: parallel-in serial-out shift registers such as the
7495(?), 74HC165, 74HC166 serial parallel counter load a one and shift it out serially bingo sequential pulses
SIPO: serial-in parallel-out shift registers such as the 74HC595, 74HC4094, TPIC6595, TLC5925. Typically data is shifted into the register one bit at a time through "the" input pin. Most "POV clocks" and "POV displays" use such chips to drive the spinning LEDs.
Most such chips can be wired up to "shift left", or they can be wired up to "shift right", but once wired up can only do one or the other.
bidirectional SIPO: bidirectional serial-in parallel-out shift registers.
Once wired up, an external control line can dynamically switch it from "shift left" -- feeding in a new bit on the "least significant bit input pin" -- and at some other time it can "shift right" -- feeding in a new bit on the "most significant bit input pin".
"universal" shift registers, such as the 74AC299, can do any of the above (at different times): output the current state of the register in parallel, shift left, shift right, and load the new state of the register in parallel.
as a general rule of thumb, about 5 times the highest frequency for quality reproduction, although one can sometimes get away with a minimum of 2 times.
7.5KHz
What is the voltage drop through resistor 1?
There is insufficient information in the question to properly answer it. You don't state the value of resistor 1, nor do you state how it is connected in the circuit, nor do you state the value of the other components in the circuit. Please restate the question, giving more details.
A device or circuit that provides power to the rest of the circuit or system is called what?
A device or circuit that provides power to the rest of the circuit or system is called a power supply,
