Construction and Working of Zener Diode: Zener diode, also sometimes called the breakdown diode, is a P-N junction diode specially designed for operation in the breakdown region in reverse bias condition. Construction and Working of Zener Diode is like an ordinary … (Read More)

Zener Diode Application: Zener diodes have numerous applications in transistor circuitry. Some of their common Zener Diode Application are explained below. 1. Zener Diode as a Voltage Regulator: Voltage regulation is a measure of a circuit’s ability to maintain a constant output voltage … (Read More)

Tunnel Diode Construction and Working: The tunnel diode (sometimes called the Esaki diode after its inventor, Dr. Leo Esaki) is a high conductivity, heavily doped two-terminal P-N junction. This diode differs from the normal P-N … (Read More)

Point Contact Diode Construction and Working: The point contact diode is basically constructed by touching a metallic whisker to an exposed surface of an N-type semiconductor substrate. The semiconductor used in the point contact diode may be either of germanium or … (Read More)

What is Step Recovery Diode? – Working and Applications: It is also a voltage dependent variable capacitor diode but with unusual doping profile. It has concentration of charge carriers decreasing near the junction, as illustrated … (Read More)

Fast Recovery Diode (FRD): Fast recovery diode are designed to provide ultrahigh switching speed. The devices can be classified into two types : diffused P-N junction diodes and metal semiconductor diodes. The equivalent circuit of both types can be represented by … (Read More)

What is Schottky Diode? – Definition, Symbols and Construction: At lower frequencies, an ordinary diode can easily turn off when the bias changes from forward to reverse. But with the increase in frequency the diode reaches a point where it cannot … (Read More)

What is Backward Diode? A tunnel diode designed to provide a small peak current (IP of the order of IV) may be employed to advantage in the reverse direction, for purposes for which the conventional diode is used in the forward … (Read More)

Power Diode – Structure, Symbol, Characteristics and Types: Diodes find many applications in electronics and electrical engi­neering circuits. Power diodes play a significant role in power electronics for conversion of electric power. A diode acts as a switch to perform various … (Read More)

Varistors or Voltage Dependent Resistors (VDRS): Varistors, also called the voltage dependent resistors (VDRs), show a high degree of nonlinearity between their resistance value and the applied voltage. They are made of non-homogeneous materials giving a rectifying action at the contact … (Read More)

What is a thermistor? – Definition, Symbol and V-I Characteristics: The word thermistor is a combination of thermal and resistor. A thermistor is a resistor with definite thermal characteristics. Most thermistors have a negative temperature coefficient, but positive temperature coefficient devices … (Read More)

Baritt diode – Working and Applications: The barrier-inject transit time (BARITT) diode is basically a back-to-back pair of diodes biased into reach-through condition. It belongs to the transit-time microwave diode family. In this diode microwave oscillation occurs due to the thermionic … (Read More)