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The Shockley diode (named after physicist William Shockley) is a four-layer semiconductor diode, which was one of the first semiconductor devices invented. It is a PNPN diode with alternating layers of P-type and N-type material. It is equivalent to a thyristor with a disconnected gate.
28 mar 2024 · A introductory tutorial on Shockley DIode also known as PNPN Diode. You will learn its structure, circuit symbols and a few applications.
Shockley diodes are four-layer PNPN semiconductor devices. These behave as a pair of interconnected PNP and NPN transistors. Like all thyristors, Shockley diodes tend to stay on once turned on (latched), and stay off once turned off.
Working Principle of Shockley Diode. The Shockley diode can be connected in forward bias and reverse bias. In forward bias, it conducts current if the applied voltage increase above break over voltage. while in reverse bias it blocks current. These modes of operation are explained in detail below.
Shockley diodes are constructed by sandwiching alternating layers of P-type and N-type semiconductor material, forming a PNPN structure. The device typically consists of four semiconductor layers, with alternating P-N-P-N regions.
Definition: Shockley diode is a four layer (P-N-P-N) device. It conducts when it is forward biased and stops conducting when it is reverse biased. The major difference between conventional diode and Shockley diode is, it starts conducting when the forward voltage exceeds break-over voltage.
13 mar 2020 · From Shockley Diodes to Thyristors and SCRs. The primary application for Shockley diodes is to control a silicon-controlled rectifier (SCR), which is a bistable switch. An SCR is just a Shockley diode with a gate connection to the p-type layer in the NPN stack of a Shockley diode. This is shown in the image below.
