Electronic and Semiconductors Devices


Electronic & semiconductors devices
  • Intrinsic Semiconductor
    ne = nh = ni
  • The number of free electrons or holes in an intrinsic semiconductor is ne = nh = AT3/2 (child's Law)
  • For an n-type semiconductor ne nh = ni
  • Current density 
  • Electrical conductivity  = ne (m + m) 
    Voltage Regulator

  • Voltage drop across R = E - E0
  • Current through R, l = lL +  

    Transistor connection
    Common emitter connection current gain

  • Common base current gain 
  • Input resistance, 
  • Output resistance 
  • Effect collector load R = R||R = 
  • Current gain 
  • Voltage gain A = 
  • Relation between a and b 

    Logic Gate

    OR Gate
  • Boolen expression Y = A + B

    AND gate
  • Boolean expression A . B = Y
  • Boolean expression Y = 

    NAND gate


  • The Boolean expression for NOR functions 
  • De Morgan's Theorems 



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