Electronics Engineering

explain 8284A clock generator

You know there is a differnce. The dynamic short circuit is dynamic and the static short circuit is static. It's common sense really.dyanamic means when due to some external source theresistance becomes zero ,can be through anythin due to high supply of current or anything,the current in that circiut becomes infinite and that result s in short circuiting. Static short circuit means when through the different changes in the voltage makes the resistance zero and current infinite ,

V = I/R

WHERE R= 0

AND CURRENT BECOMES INFINIT AND THAT RESULT IN A

SHORT CIRCUIT

Radar and communications are two different applications of radio waves.

For radar, directional antennas are used, and the normal antenna for a ship installation would be a parabolic reflector with a rectangular aperture about 5 times wider than its height. This gives a narrow beam in the horizontal direction, and pulses are sent out and detected after being reflected by the target.

Smoke. Since a voltmeter is in parallel with the load it is right across the source voltage. Putting the amp meter across the line with its low resistance it will act like a fuse, hence the smoke. Newer solid state testers are usually smarter that the operators. They have built in circuitry which sense the wrong settings you are using and shut the tester off with a "beep" to let you know that you are doing something wrong.

A passive antenna is an antenna that is not powered by an amplifier.

V=RI or I = V/R so I = 0.4/100=0.004A or 4mA

Use a shunt made a precision but very low resistance. Place the shunt in series with the ckt. Measure the voltage drop, and do the math.

The ammeter function of most voltmeters uses two ranges- about .25ohms for the 10 amp range, and a higher value for lower currents on the order of 250ma where a larger shunt won't affect the ckt too much and give a more accurate reading. Many meters are damaged when this function is used on low range first with 10 amps applied!

• processor or central processing unit (CPU);
• rack or mounting;
• input assembly;
• output assembly;
• power supply;
• programming unit, device, or PC/software

It is a subjective question meaning depends upon who you ask. I will try my best to answer it impartially as much as I can. The fundamental of both the branch is electronics. I mean foundation is the same for both the field. It starts to differ only in advance level courses. Electronics engineering has wide variety of application including Telecommunication. However, it is not only limited to one field rather applies to subsections of various field of electrical and electronics engineering. When it comes to profession, one will be better off specializing in one particular field like Digital, Analog, Microwave(RF), Mixed Signal, power electronics, Telecommunications etc. Now when it comes to electronics and telecommunication engineering, it will definitely have foundation electronics with more focus or specialized in Telecommunication. Telecomm is also rapidly growing field. So it all depends what you really want to do. As a matter of fact whichever field you study you may still be able to work in either field.

(Donna will not work)

Donna, in Mr. Jake's class, is quite docile. she never disrupts class and does little socialising with other students. But despite Mr. Jake's best efforts, Donna rarely completes an assignment. She doesn't seem to care. She is simply there putting forth virtually no effort. How would Kounin deal with Donna? Kounin would suggest to teachers that they use the following sequence of interventions until they find one that is effective with Donna.

1. Use the ripple effect. "I see many people have already completed half their work." look at Donna, later comment, "I'm afraid a few people will have to stay late to complete their work".

RPS is only the voltage& power controlled device. it can only used for set the input for our wish

A device which can change its output according to the voltage supplied to it is called a voltage controlled device.ex. a voltage controlled current source,or a field effect transistor.

In a voltage controlled current source the output current changes as the voltage supplied to it changes.

The small signal model for the common source FET can be used for analysing the basic FET amplifierconfigurations:(i)common source(CS),(ii)commondrain(CD) or source follower,and(iii)common gate(CG). The CS amplifier which provides good voltage amplification is most frequentlyused.The CD amplifier with high input impedance andnear-unity voltage gain is used as a buffer amplifier and the CG amplifier is used as a high frequencyamplifier.The small signal current-sourcemodel for the FET in CS configuration and the voltage source model can be derived by finding the Thevenin'sequivalent for the output part of amplificationfactor,drain resistance andtransconductance/mutual conductance of the FET.

Cooling Load is the amount of energy that is to be extracted from a house to develop a conditioned environment. There are two types of cooling loads i.e, sensible cooling load and latent cooling load....

Heating Load is the amount of heat that is to be supplied to a house in order to increase its temperature to maintain desired temperature...

Capacitors resist change in voltage. By definition, the equation is dv/dt = i/c, or rate of change of voltage in volts per second is current in amps divided by capacitance in farads. In order for the voltage to change instantaneously, then dv/dt must be infinity, which means i/c is also infinity. If capacitance is non-zero, then current must be infinity. Since there is no perfect voltage source, or no resistor or wire with perfect zero ohms, then it is impossible to have an infinite current, so it is impossible for the voltage across a capacitor to change instantaneously.

If the zener diode is in zener breakdown the voltage across the zener diode remains constant regardless of current (for the ideal zener diode).

Real zener diodes have parasitic resistance that causes the voltage across the zener diode to increase slightly with increased current, but due to temperature dependant variations in this parasitic resistance as well as temperature dependant variations in the zener breakdown voltage, this change in voltage in real zener diodes cannot be described by a simple linear factor.

We couldn't agree more.

Green, Black, Orange, (gold / silver)

Green = 5

Black = 0

Orange = x10^3

50x10^3 = 50,000 or 50k Ohm

when a resistive load is applied there is no phase angle difference between voltage and current. when a inductive load is applied there is phase difference between voltage and current. current lags voltage by an angle of 90 degrees for pure inductive load

UJT (UniJunction Transistor): It is a transistor with only one junction and three terminals: an emitter (E) and two bases (B1 and B2).

BJT (Bipolar Junction Transistor): This type of transistor consists of two junctions and three terminals, namely Emitter "E", Base "B" and Collector"C". There are two types of BJT, i) PNP and ii) NPN.

that is called a form factor which is always b 1.1

Most Digital Multi-Meters (DMM's) have a diode test function the symbol looks something like this >| (picture the greater than sign as a black triangle pointing to and touching the redline).

Initially you should practice on a known good transistor, so you'll be able to tell if you have a bad one.

1) Ensure the transistor is out of circuit.

2) Set the DMM to the diode function.

3) Touch the positive (red) and negative (black) probes to any two leads on the transistor until you get a reading other than infinity.

4) Once you get a reading leave one of the probes on one of the leads (it doesn't matter which one).

5) Take the other probe and touch the third lead. If you don't get a reading other than infinity go back to step 4, this time leave the other probe on the lead it was originally on, when you got the reading other than infinity.

6) Now take the other probe and touch it to the third lead, you should get a reading other than infinity. If not, go back and repeat steps 3-6, but start with 2 different leads, until you can leave 1 lead in place and get a reading other than infinity on the other 2 leads.

7) If you kept the Positive lead in place you have an NPN transistor. If you kept the Negative lead in place you have a PNP transistor.

8) The probe you left in place denotes the Base.

9) On the probe that you swapped, the lead with the lower reading is the Collector and the lead with the higher reading is the Emitter.

If the question is what is the waveform for 2 Mhz, then 500nS is the answer (equasion used is f=1/t)

If the question is what is the waveform for 2mHz, then 500 S is the answer.