It contains LASCR symbol, constructions, working, V-I characteristics and applications etc. https://amzn.to/2UK20D0 click here to buy E&TC GATE –Pearson book

1. Light Activated SCR
Rashmi Patil
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2. Light Activated SCR
• Definition: LASCR or light activated SCR is a semiconductor
device which turns ON when it is exposed to light. The
constituent element of SCR is silicon, and it works like a
rectifier, and thus, it is termed as Silicon Controlled
Rectifier. The LASCR is a type of thyristor which is triggered by
photons present in the light rays.
• It is a three terminal device, consists
of cathode, anode and gate terminal.
• The gate terminal is used when the electrical triggering is
supplied to the LASCR. The advantage of using triggering of
the thyristor by light is prevention from electrical noise
disturbances. Thus, LASCR is considered to be one of the best
devices.
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3. Symbol and Structure of LASCR
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4. Construction of LASCR
• The LASCR is made up of silicon material, and the
glass lens in the LASCR is used to focus the light
from the external source on the semiconductor
material. The silicon pellet is used in the bottom
of the device, and the light intensity dislodges
electrons in the semiconductor crystal and
contributes to conduction.
• The constructional architecture of the LASCR is
described below in the diagram.
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5. Construction of LASCR
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6. Working of LASCR
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7. V-I characteristics of LASCR
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8. Application of LASCR
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