Power BJT - Construction, Operation and its Characteristics: Power transistors are large-area devices. Because of differences in geometry and doping concentrations, their properties tend to vary from those of the small-signal devices. The structure of…
Light Activated SCR (LASCR) - Symbol, Construction and Operation: Light activated SCR is just an ordinary SCR except that it can also be light triggered. Most LASCRs also have a gate terminal for being triggered…
Silicon Controlled Switch (SCS) - Symbol, Operation, Advantages and Application: Silicon controlled switch (SCS), like the SCR, is a unilateral, four layer, three junction P-N-P-N silicon device with four electrodes namely cathode C, cathode gate…
Gate Controlled Switch (GCS) Circuit - Operation and Advantages: As mentioned earlier, low-current drop out is the normal way in which the SCR is turned off. Gate controlled switch is designed for easy opening with…
Shockley Diode Equation, Symbol, Operation and Applications: The four layer diode, also called the Shockley diode after its inventor Willian Shockley, is essentially a low-current SCR without a gate. It is classified as a diode…
What is DIAC? - Symbol, Construction, Operation and Applications A diac is an important member of the thyristor family and is usually employed for triggering triacs. A diac is a two electrode bidirectional avalanche diode…
SCR as Full Wave Rectifier Circuit Diagram: For Two SCR as Full Wave Rectifier are connected across the centre taped secondary, as shown in Fig. 26.32 (a). The gates of both SCRs are supplied from…
SCR as Half Wave Rectifier Circuit Diagram: SCRs are very useful in ac circuits where they may serve as rectifiers whose output current can be controlled by controlling the gate current. An example of this…
Difference Between Thyristor and Transistor: As already mentioned, transistors and thyristors are both semiconductor devices. They are now widely employed in switching operations because of their numerous advantages such as noiseless operation owing to absence…
Difference Between Thyristor and Thyratrons: Before the discovery of thyristors, thyratrons were used for industrial control, but now they have been replaced by the thyristors because of the following drawbacks of thyratrons. 1. Thyratron needs…