Electronic Devices: It is the branch of physics that deals with the emission and effects of electrons emission and effects of electrons and the use of electronic devices.
Electronic Circuits: Components are connected together to create an electronic circuit with a particular function. Active components are sometimes called devices.
n‐type semiconductor
p‐type semiconductor
Various materials are classified based on the width of forbidden energy gap. In metal, there is no forbidden gap and valence and conduction band are overlapped. In an insulator, the forbidden gap is very large up to 7eV while in semiconductors it is up to 1eV. The silicon and germanium are widely used semiconductors. Intrinsic materials are those semiconductor that has been carefully refined to reduce the impurities to a very level-essentially' as pure as can be made available through modern technology.
Negative Temperature Coefficient: Those parameters decreasing with the temperature have a negative temperature coefficient, e.g., an energy gap (Eg).
where, constant β0 = 2.2 × 10–4 (for Ge)
= 3.6 × 10–4 (for Si)
Mobility (μ), μ ∝ T–m
Positive Temperature Coefficient: Those parameters increasing with temperature have a positive temperature coefficient.
In n-type, nnpn = ni2 , hence
In p-type, ppnp = ni2, hence
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1. What is a semiconductor? |
2. How are semiconductors used in electronics? |
3. What are the properties of semiconductors? |
4. What is the difference between a conductor and a semiconductor? |
5. How are semiconductors manufactured? |
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