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Tunnel Diode

Tunnel DiodeThis diode was first introduced by Dr. Leo Easki in 1958. It is called a tunnel diode because due to its extremely thin depletion layer,

Zener diodes

Zener diodZener diodes are used to maintain a fixed voltage. They are designed to 'breakdown' in a reliable and non-destructive way so that they can be used in reverse

Darlington pair

Darlington pair

Darlington Pair consists of two transistors connected together so that the amplified current from the first is amplified further by the second transistor.

Opto Coupler

Opto Coupler Circuit

Opto coupler are designed to provide complete electrical isolation between an input and output circuits. The useful purpose of isolation is to provide protection from high voltage

FULL WAVE BRIDGE RECTIFIER

full wave bridge rectifier consists of four diodes under the condition in which four diodes are connected the called bridge circuit. So due to this type of circuit is named bridge rectifier.

FORMATION OF DEPLETION LAYER IN DIODE

There is grater concentration of holes in P-region and electrons in N-region. This deference in concentration establishes a density mismatch across the junction resulting in majority carrier

ELECTRONIC EMISSION

If we provide energy to an electrode then the electrons in the outer most shell of the atom of that metal gain enough energy to erect form the surface of that metal or electrode.

CATHOD RAY TUBE (CRT)

A CRT is an electronic tube designed to desplay electrical data. It consists of following main four parts. Focusing anode deflection coils, cathode and vacuum tube.

HALF WAVE RECTIFIER

Half wave rectifier Diode has a property that is ability to conduct current in only one direction. Due to this property diodes are used in rectifier circuits. As rectification is the process to convert AC signal to Pulsating DC.

FILTER CIRCUITS

LC Filter

To remove the AC components from a rectifier circuit a filter is used. A filter circuit is a device to remove the AC components of rectified output. A filter circuit is a combination of inductor and capacitor and is called LC filter.

BJT Bipolar Junction Transistor

This name is a representation for a device having transfer resistors. As we have seen a semiconductor offers less resistance to flow of current in one direction and high resistance in another direction

HYBRID EQUIVALENT FOR CB TRANSISTOR

The figure shows the transistor connected in common emitter configuration and the figure also shows the hybrid equivalent circuit of such a transistor.

HYBRID EQUIVALENT FOR CC TRANSISTOR

The figure shows the transistor connected in common emitter configuration and the figure also shows the hybrid equivalent circuit of such a transistor.

HYBRID EQUIVALENT OF TRANSISTOR

Figure(a) shows a transistor amplifier circuit. Such circuit can be connected in any one of the three configuration called common emitter,

VOLTAGE MULTIPLER

In voltage multiplier circuit two or more peak rectifiers are cascaded to produce a d.c voltage equal to multiplier of the peak input voltages Vp i.e., 2Vp, 3Vp, 4Vp.

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