Power MOSFET

Power MOSFET SymbolThe power Metal Oxide Semiconductor Field Effect Transistor (MOSFET) is a device derived from the field effect transistor (FET) for use as a fast acting switch at power levels. MOSFET is a voltage controlled device. Read more about Power MOSFET

IGBT - Insulated Gate Bipolar Transistor

IGBT Construction & symbol The insulated gate bipolar transistor (IGBT) is a device which combines the fast acting features and high power capability of the bipolar transistor Read more about IGBT - Insulated Gate Bipolar Transistor

Power transistor

Power Transistor SymbolThe bipolar power transistor is a three layer NPN or PNP device within the working range, the collector current IC is a function of the base current IB,

 

 

Thyristor Gate Firing Networks

Typical Firing CircuitA firing network consists of a Transformer for isolating a resistor R1 to limit gate current and a resistor R2 to limit gate voltage. When the thyristor is in the OFF state Read more about Thyristor Gate Firing Networks

How to turn off the thyristor

Thyristor Current During Trun offTo turn off the thyristor the anode current must be reduced below the holding level and a relatively long time allowed elapsing for the thyristor... Read more about How to turn off the thyristor

Thyristor Volt Ampere Characteristics

Thyristor With gate terminal openThe thyristor in this condition may be considered as three diodes in series, with directions such as to prevent conduction in either direction. Read more about Thyristor Volt Ampere Characteristics

Thyristor

Thyristor was invented in 1957 at Bell Labs. They are extensively used as switches, operating from conducting state to non-conducting state. Read more about Thyristor

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, Read more about Tunnel Diode

Rotary Or Mechanical Dial

A Rotary Or Mechanical Dial is an impulse sending device. When the subscriber lifts his handset, the D.C. loop is completed and steady current flows through the line provided by the exchange.
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LVDT

LVDT Linear Voltage Diffrential TransducerLVDT consist of one primary winding and two secondary windings, which are placed at either side of the primary winding on the same magnetic core as shown in figure Read more about LVDT

WAVEGUIDE

Waveguide is the type of transmission line which carries microwave frequencies from source to load. The energy is in the form of electric field and magnetic field which are perpendicular to each other the electric field and magnetic field inside. Read more about WAVEGUIDE

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TRANSMISSION LINE

Co-axial Cable

Transmission line is defined as the path of carrying alternating electrical energy from source to load. For example the wire used between T.V antenna and television set or the wire used between transmitter antenna and transmitter are known as transmission

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by Dr. Radut