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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 is the block diagram of Analog to digital converter?
Analog signals are converted into digital signals through the following steps:
- The analog signal passes through a sample and hold circuit which samples the signal at sampling instants.
- After sampling, the signal is quantized
- Ans lastly it is encoded
What is ALE in 8085 in microprocessor?
ALE=Address Latch Enabled.(pin number 30 in 8085)
8085 has a special pin referred as ALE, which indicates whether multiplex bus functions as an address bus or a data bus. Whenever 8085 starts any new operation, ALE signal goes to logic 1 for about 1/2 clock cycle, at about the falling edge of CLK. If ALE=1 then multiplex bus functions as address bus. After that half clock cycle, it goes to logic 0 for nearly 3 or 4 clock cycles. If ALE=0 then multiplex bus acts as a data bus.
The ALE pin helps to enable the latching of lower order ADDR bus. The AD0-AD7 pins, as well as other control pins such as S0, S1, IO/M-, and the other address pins A8-A15, are setup to be correct at the falling edge of ALE.
Which Capacitor should be connected in one direction?
The electrolytic capacitor should be connected in only one direction.
Real world op amps have infinite gain?
Real world op amps have very high gain, but they do not have infinite gain.
Calculate the power loss when the voltage is 120 volts and has a resistance of 230 ohms?
By Ohm's law, 120 volts across 230 ohms is 0.522 amps. By the power law, that translates to 62.6 watts. You ask about power loss. In order to answer that, you need to provide more information, such as some change in configuration, or some other component. Please review and restate your question.
What is the substitution of variables using the ohm's law?
Using the equation for the power dissipated by a resistor and Ohm's Law V=IR find the expression for power that involves only current and voltage.
using the method of substitution of variables, find a solution to the problem statement above
What are an alternative set of units that could also be used to express power.
Can I use a 3.7 v 750mah battery in place of a 3.7v 650mah battery?
It is always best to replace batteries with identical batteries.
However if the replacement battery has the same voltage and the same physical construction (so it will connect electrically) it can usually be used as a replacement.
The mah rating (capacity) only says how long it takes to charge and how long it will run between needing a charge. However some charging circuits might experience problems if this rating is significantly different from the original.
At no load, the speed of a series motor rises to a run-away condition if the full voltage is applied because the applied voltage appears directly at the terminals of the motor and drives it to a run-away condition since speed is proportional to the voltage.
Explain Ri and Ro effect the performance of bjt voltage amplifier?
aries.ucsd.edu/NAJMABADI/CLASS/ECE65/06-W/NOTES/BJT3.pdf
Assuming that you are referring to a modem (analog dial up, or DSL , or Cable Modem - they all use one form or more of QAM or QPSK), then there a radio device that decodes an analog modulated signal (with forward error correction) into digital bits and double-checks their integrity, and then tweaks the digital stream a bit to prepare
it to be placed upon an ethernet bus. Ethernet has it's own special cable and electrical and encryption and protocol specifications also, but to keep things short, the physical uses Manchester codes to send both data and clock signals, and prevent a DC bias from appearing on the line or in the conducting transformer. And, then, after the Physical Layer, there are three more layers of topology to help separate the different stages of passing the message (packet) of data.
(Read more at Wiki's article on Ethernet or the Internet Protocol Suite).
The messages are passed from your Router to your Computer over the Ethernet Cable to the receiving end (your computer) and another radio decodes the modulation and converts the signals back into a stream of bits and bytes that the computer can use (via the communications busses of PCI/PCI-e, etc. and the requesting computer normally puts the received information into RAM so the application can use it.
This is a simplified version of what really goes on. You have your question out-of-order as the switches and communications channel need to be between the source and destination computers.
If I were you, I'd study oup on Ethernet, and Docis 1,Docsis 2 standsards and once you feel comrfortable with that, then you can pick up routing and NAT and Firewalling, and that is where you can get a better functional understanding of how things work. Don't forget that there are plenty of online web resources to help teach you on IP Protocols and Packet Transmission over the internet.
What does a IC 555 do in a buzzer circuit?
The IC You speak of, commonly referred to as a 555, is a multivibrator. Simply put, it can be configured to produce voltage pulses in some order.
In the case of a buzzer circuit, it is used to vibrate with a certain frequency - this frequency is then driven to the speaker and is heard as the 'buzz'. And thus, it's a frequency source.
Which regulator ics are used to get 5v and -5v supply?
Some simple 3 terminal single chip linear regulators are:
- +5V - 7805, LM309, LM323
- -5V - 7905, LM320
- +5V - LM2574-5.0, LT1076-5
- -5V - LT3015-5
Note: always read the datasheet carefully to make sure a part meets the requirements of your application before designing around the part.
Why was the capacitor discharging current negative?
When a capacitor is discharging, current is flowing out of the capacitor to other elements in the circuit, similar to a battery. Current flowing out of an element, by convention, is defined as negative current, while current flowing into an element, such as a resistor, is defined as positive current. Thus a discharging capacitor will always have a negative current.
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Why electrolytic capacitors are used for frequency response of BJT as amplifier?
It can take a lot of capacitance to present a low impedance to a low frequency. Electrolytics offer lots of capacitance for a low price.
What are the applications of dc compound motors?
In Ice factories it is most preferred!!!
it demagnetizes severely when field polarities are reversed.
but when connected properly ,can be used for ample applications.
What are the applications of multilevel inverters?
The various applications of multilevel inverters are
1. Motor Drives
2.Active Filters
3.Power conditioning
Local loop
Local loop
Network + Guide To Networks Fifth Ed. Review Question Chapter 7 #2
