Electronics Engineering

Basically a diode is a combinstion of pN junction but the transistor is made with three terminals EMITTER,, BASE ,, JUNCTION.. and diode is just a combination of positive and negative terminal . diode and transistors are both used as a switch .. but a transistor is more widly udes than a diode. and diode has also very important in electronics DIGITAL SYSTEM to make the screen's ..and transistors are used in amplifiers the group of transistors make an amplifier . and we use a diode in seven segment display ....diode is small and carry less current due to its small size but transistor get large current.

A2

A diode has two connections. It allows current to flow in one direction and not in the other. They are used for rectification in power supplies, detection of AM radio, blocking of current etc.

A Transistor has three connections. Current is controlled between the emitter and collector, by a small current on the base. They are used as switches, amplifiers and regulators.

first decide the numbar of bits...for four bits write the varoiurs combination of each bit.

for 4 bits 2^4=16 combination starting from 0000-1111.

similarly you will get 4 bit gray code by ex-oring (u may find this conversion in any book digital book).

now draw k-map for each out put bit

binary gray

0000 0000

0001 0001

0010 0011

...... ......

....... ......

1111 0000

consider case for 0010 to 0011.

lsb will be g0(1) and msb will be g3.(0)

each bit should be considered as an output and k-map has to be drawn for each output,viz g0,g1,g2,g3.

after implementing this ,realise the output expression using gates.(k map will give simplified output).

this is basic operation...but if u plan to implement in an project try getting an ready made IC.

A: Definitely NOT it must follow its linear load region a close loop of approaching infinity will certainly be inclined to be not stable

Short circuit voltage is the voltage that has to be applied to the primaries of a transformer, so that the nominal current flows through the secondaries, when they are shorted. This value is important, if transformer secondaries shall be used in parallel. Ideally all transformers with parallel secondaries should have the same short circuit voltage. When their short circuit voltages are different, the transformer with the lower short circuit voltage will be loaded more than their relationship of power ratings would predict. The short circuit voltage is also important in the design of a transformer, because it predicts, how much the secondary voltage will drop at nominal output current. This knowledge helps the designer to find out, how many further windings the secondary needs for a certain voltage in relation to an ideal transformer. Short circuit voltage is also known as impedance voltage.

The load current is made to flow through the thermal overload relay, which is actually a bimetalic strip. Beyond a prespecified current the bimetalic strip tend to deflect due to heat (thermal effect) thus cutting off the circuit and hence it acts as an over load relay protection.

To determine how many flip-flops will be complemented in a 10-bit binary counter to go from the binary number 1001101111 (which is 635 in decimal) to the next count (1001110000, or 636 in decimal), we look at the binary representation. The least significant bit (LSB) changes from 1 to 0, and the next bit (the second LSB) changes from 1 to 0, leading to a carry that causes the third LSB to change from 1 to 0 as well. Thus, 3 flip-flops are complemented in total.

An analog control system is one that presents data by measuring a continuous variable. This reports the data back in voltage or pressure.

When a dc supply is connected to a resistor, current flows.

The current in amps is equal to the supply voltage divided by the resistance in ohms.

The power used is the voltage times the current, and that appears as heat in the resistor, which might become hot to touch.

EMITTER, COLLECTOR, AND BASE

The difference between a Field Effect Transistor and a regular transistor is that the regular transistor has PNP and NPN junctions and a FET has just a Drain Source Gate

junction and is sensitive to static electricity just as not as bad as a MOSFET. Soldering

a FET requires technical skill than it does a regular transistor. Transistors are used in switching and audio applications while FET's are used in RF VHF and HF applications and switching on high current devices such as LED's and piezo buzzers.

So a one transistor radio using a PNP transistor does not mean you will pick up more stations you will just receive a weak audio voltage through the high impedance earphone from the simple diode circuit using a 9 volt battery. While FET's and MOSFET's will amplify the signal.

MOSFET's are for really high current devices that's why have heat sinks on top of them.

100meter

A 'polarity test', as it applies to a switch, is performed to confirm that the switch is located in the line conductor and not in the neutral conductor.

Diode rectifier

1.) Turn all the power in the circuit off. 2.) In volts mode (both AC and DC) check to make sure there is no power. 3.) In ohms mode check to see if the resistance is close to zero. (Check zero by connecting the leads together momentarily.) Note that light bulbs will have far less resistance cold than when hot, due to their negative temperature coefficient, so you should remove them, and that transformers and motors will appear to have zero ohms due to their inductive reactance, so they will also need to be pulled from the circuit.

18 Volts.

2.4GHz is used & OFDM

We might identify an integrated circuit (IC) by recognizing it in a circuit. A voltage regulator in a piece of electronic equipment might be an example of an IC that a technician might recognize. There is also the idea that the number on the package can be used to cross reference the device and identify it. There are a number of cross reference guides on the web that will assist in locating a data sheet on a particular package.

A: is not current or voltage but rather the product that is of concern

Applied input signal at the base of the amplifier appears across the emitter resistor (RE) due to inter electrode capacitance so it should be bypassed the emitter resistor (RE) through the bypass capacitor (CB). unbypassed signal will be amplified (common emitter amplifier) and reverse back from the emitter to the collector through the base, amplified signal from the emitter to the collector (common emitter amplifier) is 1800 out of phase to the amplified signal from the base to the collector (common base amplifier), so reduced the gain.

AC voltage controllers are used for controlling the speed of universal motor or induction motor by changing the firing angle :) -vinodh gav

mne tau aku.....aku tanye mg...mg tye aku....rezab saya

T1 connection - Transmit data up to 1.544 Megabits per second. Upload bandwidth is the same as the download bandwidth. Used by medium sized businesses. European standard is called E1 and transmits data up to 2.048 Megabits per second.

T3 connection - Transmit data up to 45 Megabits per second. More expensive than T1 connection's. Used by larger businesses. European standard is called E3 and transmits data at 34.368 Megabits per second.

Metro Ethernet - Used by large companies such as banks. Connects main office with other branches using switched technology allowing for large amounts of data to be transferred fast and less expensively.