Why CE configuration has an iverting output

Why we obtain inverting signal (180 out of phase ) in CE configuration

6 Answers
Top Voted Recent Answer
1-6 of  6
6 Answers
Top Voted Recent Answer
  • Their is a phase shift of 180 degree
    0
  • As in ce configuration base current is directly proportional to base voltage and it also increases the collector current which create a voltage drop in the resistor across the collector as the output is situated below the collector resistance the output voltage thus decreases as the voltage drop across the collector resistor increases .thus produces a phase shift of 180 degrees
    and we can verify this by kirchoff's law,Vcc=Icc+Vout .here when collector current increases output voltage must decrease.
    0
  • The inversion can be easily seen intuitively without any complex circuit analysis. If you pull up on the base of the NPN device (increase the voltage), the collector current will increase. As the collector current increases, the voltage across the load resistor will increase and this results in the output voltage dropping. The output voltage decreases in response to an increasing input voltage… thus the inversion… and this can be represented as a 180 degree phase shift.
    0
  • Common emitter input output phase relationship. The common emitter transistor amplifier is the only configuration that gives an inversion, 180°, between the input and output signals. The reason for this can be seen from the fact that as the input voltage rises, so the current increases through the base circuit
    0
  • because the output voltage is out of phase
    0
  • The negative alternation of an AC signal will cause a decrease in IB this action then causes a corresponding decrease in IE through RL(load). The output signal of acommon- emitter amplifier is therefore 180 degrees out of phase with the inputsignal.
    0
forum   Other Related Discussions
Electronics And Communication

Didn't get the answer.
Contact people of Talent-Electronics And Communication directly by clicking here