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How would you set up a circuit to obtain NOT gate using a transistor? |
Answer» Solution : For case I: When `A=0, I_(B)=0` `RARR I_(C )=beta I_(B)=0` Now `V_(C C)=I_(C )R_(C )+V_(CE)` `=0+v_(0)` `therefore v_(0)=V_(C C)=5V` `rArr` STATE of output `C=1rArrC=barA` For case II : When `A=1, I_(B)=` MAX. `rArr I_(C )=beta I_(B)=`max. Now `V_(C C)=I_(C )R_(C )+V_(CE )` `5=5+V_(CE)""(because I_(C )="max.")` `therefore v_(0)=V_(C C)=0` `rArr ` State of output `C=0 rArr C=barA` Thus, above circuit BEHAVES like NOT gate.  Thus, `C=barA` |
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