semiconductor electronics
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The document contains questions about semiconductor physics concepts including: the thermal equilibrium concentration of electrons in the conduction band using Fermi-Dirac distribution and density of states; the value of surface potential under flat band condition; drawing the energy band diagram for a pn-junction under thermal equilibrium; mathematically expressing phonon scattering for electrons and holes; applications of the hybrid-pi model for BJTs; and determining the n-type doping concentration given values for the p-type doping, maximum electric field, and reverse bias voltage of a silicon pn-junction.
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![• Write the expression of the thermal equilibrium concentration of electrons in the conduction
band using Fermi-Dirac probability function density of states and other terms? [2]
Concentration of electron:
n0=NC exp[-(EF-Ev)/kT]
where NC=2[(2πmn*kT)/h2
]3/2
• What is the value of surface potential under flat band condition? [2]
• Draw the energy band diagram for a pn-junction under thermal equilibrium condition? [2]](https://image.slidesharecdn.com/aswini123-150622154531-lva1-app6892/85/semiconductor-electronics-1-320.jpg)
![• What is phonon scattering? Write down mathematically for both electrons and holes? [2]
• In what type of application of BJT, hybrid-pi model is used? [2]
• Consider a si pn-junction at T = 300K with dopping concentration Na=10^16 cm^-3.Determine n-
type dopping concentration Nd ,such that the max electric field at the metallurgical junction|
Emax|=3*10^5 v/cm at reversebais voltage 25v.[10]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Digital image processing involves processing digital images using computer software and algorithms. It is used to improve images for human viewing, enable efficient storage and transmission of images, and for automated image analysis. The key steps in digital image processing are image acquisition, preprocessing, segmentation, representation and description, recognition and interpretation. Digital image processing has applications in fields like medical imaging, weather forecasting, and machine vision.
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Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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