✔ Pin Diode Working

A pin diode behaves as a current controlled resistor at radio and microwave frequencies. The pin diode is an alteration of the pn junction for particular applications.

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The occurrence of an intrinsic layer can significantly increase the breakdown voltage for the application of high voltage.

Pin diode working. The low forward resistance of the intrinsic region decreases with increasing current. When forward biased it acts like a current controlled variable resistance. Learn more at byjus.

The electric field induces because of the movement of the holes and the electrons. A pin diode is almost similar to a normal pn junction diode however the only variation is the presence of intrinsic region. Due to this large magnitude of an electric field the electron hole pair generation will augment up to a large extent and this in turn can process even a weak input signal.

This is shown in figure b and c. The diode in which the intrinsic layer of high resistivity is sandwiched between the p and n region of semiconductor material such type of diode is known as the pin diode. The pin diode consists of heavily doped p and n regions separated by an intrinsic i region as shown in figure a.

This region is nothing but serves as the depletion region between p and n regions. The p type and n type regions are typically heavily doped because they are used for ohmic contacts. The pin diode consists of heavily doped p and n regions separated by an intrinsic i region as shown in figure a.

The high resistive layer of the intrinsic region provides the large electric field between the p and n region. Pin diode is formed by sandwiching intrinsic layer high resistivity about 01 w m between p type and n type semiconductor in order to create an electric field between them. Like the conventional pn diode it allows current flow in one direction when forward biased but not in the other when it is reverse biased.

Pin diode is a diode with a wide and undoped intrinsic semiconductor region between a p type an n type semiconductor region. A pin diode is a diode with a wide undoped intrinsic semiconductor region between a p type semiconductor and an n type semiconductor region. When forward biased it acts like a current controlled variable resistance.

When no any external potential is provided to the diode. It was first used in 1952 as a low frequency high power rectifier. This functionality is a simple and critical functional block of many circuits spanning dc to rf.

Working of pin diode. When reverse biased the pin diode acts like a nearly constant capacitance. When reverse biased the pin diode acts like a nearly constant capacitance.

After the pn junction diode was developed in the year 1940s the diode was first exercised as a high power rectifier low frequency during the year 1952. This is shown in figure b and c.