Electronics and Communication Engineering - Analog Electronics - Discussion
Discussion Forum : Analog Electronics - Section 1 (Q.No. 14)
14.
In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit
Answer: Option
Explanation:
All voltages and currents have reverse polarity.
Discussion:
2 comments Page 1 of 1.
Shakti said:
1 decade ago
How please demonstrate?
Dipanjan said:
1 decade ago
@Shakti.
For that you need to understand the differences between NPN and PNP transistors.
First of all, in NPN, current flows from collector to emitter but in case of PNP, current flows from emitter to collector.
Another important difference is with respect to base voltage (with respect to gnd). If the voltage at the base is increased in NPN, rate of current flow increases simultaneously but decreases in case of PNP.
Correct me if I'm wrong.
For that you need to understand the differences between NPN and PNP transistors.
First of all, in NPN, current flows from collector to emitter but in case of PNP, current flows from emitter to collector.
Another important difference is with respect to base voltage (with respect to gnd). If the voltage at the base is increased in NPN, rate of current flow increases simultaneously but decreases in case of PNP.
Correct me if I'm wrong.
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