Category: Analog Electronics
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Current and resistance in pn junction diodes, L-VII.
Current flows in a pn junction diode under the application of external potential. The application of such a potential is known as “biasing”. The resulting Poisson’s equation becomes a nonlinear differential equation, i.e. charge concentrations now depend upon the potential. But the potential V (or Φ) now is a function of ‘x’ (location). Thus the…
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Energy levels in semiconductors. L-V.
Today we will discuss about energy levels and energy bands in semiconductors as well as breakdown in reverse bias. This is because there is an attractive interaction between the nucleus and the electrons. Electrons must gain energy to go into higher energy levels. This is achieved by sources of heat, light or applied potentials. When…