The document discusses the Silicon Controlled Rectifier (SCR), covering its structure, symbol, and operational principles including the forward blocking state, reverse blocking state, and conducting state. It highlights key concepts such as latching and holding current. The document serves as a guide for electronics and communication engineering, particularly for GATE 2022 exam preparation.

1. Silicon Controlled Rectifier(SCR)
Rashmi Patil
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2. Structure and Symbol of SCR
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3. Principle of operation of SCR
• Forward blocking state(OFF state):
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4. Principle of operation of SCR
• Reverse blocking state:
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5. Principle of operation of SCR
• Conducting State(ON state)

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15. Latching and holding current
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