☑ Explain The Functions Of The Junction Diode As A Switch

The diode is considered as a switch as it can perform switching but the transistor can perform switching as well as amplification. One of such applications is an electrical switch.

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Pn junction diode construction working and uses.

Explain the functions of the junction diode as a switch. Forward and reverse bias switch a diode between the low and high impedance states respectively. Diodes can perform switching and digital logic operations. The real characteristics of pn junction diode varies with the applied external potential to the junction that changes the properties of junction diode.

The junction diode acts as short circuit in forward bias and acts as open circuit in reverse bias. In ideal conditions this pn junction behaves as a short circuit when it is forward biased and as an open circuit when it is in the reverse biased. A pn junction diode is formed when a p type semiconductor is fused to an n type semiconductor creating a potential barrier voltage across the diode junction the effect described in the previous tutorial is achieved without any external voltage being applied to the actual pn junction resulting in the junction being in a state of equilibrium.

There are two types of transistors junction transistor and field effect transistor. Diode switching times pn junction switching times reverse recovery time forward recovery time storage time transition time why reverse recovery time dominate. Hence the change of forward and reverse biased states makes the diode work as a switch the forward being on and the reverse being off state.

Functions of transistor 1 it is used as a switch for large currents you can turn onoff a large current flow by turning onoff a small current using a transistor. The pn junction when forward biased acts as close circuited and when reverse biased acts as open circuited. Diodes can perform digital logic functions.

The diode needs only one battery source to perform its operation while the transistor needs two battery sources to perform its function. A pn junction is the simplest form of the semiconductor diode. As such the diode can be viewed as an electronic version of a check valve.

Main functions edit the most common function of a diode is to allow an electric current to pass in one direction called the diodes forward direction while blocking it in the opposite direction the reverse direction. The name diode is derived from diode which means a device that has two electrodes. Skip navigation sign in.

Diode logic was used in early digital computers. Thus it serves as a switch.