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    indirect band gap semiconductor doubt ....

    its said that indirect band gap semiconductors like silicon and germanium are not used as a light sources because they have more non-radiative recombinations rather than radiative ,which inturn decreases efficiency of optical source. but i want to understand how indirect band gap materials...
  2. M

    how impedence matching is done with any transistor configuration ????

    hello friends....we all know that common collector transistor have higher input impedence and lower o/p impedence ....and this is very good for impedence matching....but i dont know how impedence matching is done by them.... can anyone help me out ???? thanks in advance....
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