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A small signal source V(t)=Acos20t+Bsin10000t, is applied to a transistor amplifier as shown. The transistor has β=150 and hie=3KΩ. What will be the VO?​
  • a)
    1500(Acos20t+Bsin10000t)
  • b)
    -150(Acos20t+Bsin10000t)
  • c)
    -1500Bsin10000t
  • d)
    -150Bsin10000t
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A small signal source V(t)=Acos20t+Bsin10000t, is applied to a transis...
AV=-hfe RLI/hie=3*150/3=-150. So, VO=-150V(t)
But cos20t has low frequency so capacitors are open circuited. Only, the sine component is allowed.
So, Vo =-150Bsin10000t.
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A small signal source V(t)=Acos20t+Bsin10000t, is applied to a transistor amplifier as shown. The transistor has β=150 and hie=3KΩ. What will be the VO?​a)1500(Acos20t+Bsin10000t)b)-150(Acos20t+Bsin10000t)c)-1500Bsin10000td)-150Bsin10000tCorrect answer is option 'D'. Can you explain this answer?
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