Question
Download Solution PDFFor the SCR shown, if a forward voltage is applied to the anode and cathode, with the gate open, then which of the following is true?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFSilicon Controlled Rectifier (SCR)
The given device is a Silicon Controlled Rectifier (SCR), which is a four-layer (PNPN) semiconductor device with three junctions:
J1 (P-N junction at the anode side), J2 (N-P junction in the middle), J3 (P-N junction at the cathode side).
Explanation:
- Since the anode (P) is positive relative to the next N-layer, J1 is forward biased.
- The junction J2 has an N-layer at a higher potential than the P-layer. This makes J2 reverse biased.
- The lower P-layer is at a higher potential than the N-layer of the cathode. Thus J3 is forward biased.
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