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American University of Sharjah School of Engineering Electronics I Lab C ELE241L DC and AC Analysis of Common-emitter and Common-collector Amplifiers Abstract Objectives 1To verify the DC and AC analysis of CE and CC amplifier circuit 2To design and verify a CE amplifier circuit Summary of Procedure In the first part of the experiment we connected the common emitter and common collecter amplifiers circuits that are given in the procedure Then we followed the instructions given to find out the voltage gain the input resistance and the output resistance for each one After that we calculated the current gain In addition in the second part of the experiment we designed and implemented a bypass common emitter amplifier Summary of Conclusion This experiment was done into two weeks In the first lab we verified the DC and AC analysis of common-emitter and common- collector amplifier circuit it stressed the theoritical part that we have studied in Electronics I course The second lab enhanced our ability to design and construct a bypass common- emitter amplifier Procedure 1- Common-emitter amplifier Connect the circuit of Fig1 using the BC107 npn transistor with Vcc 10V Rc 730W Re 470 W R1 135K W R2 47K W Cs 1mF Cc 1mF Ce 10mF Fig 1 C Common-emitter amplifier circuit bypassed emitter Measure the DC biasing VCEQ VBEQ VB ICQ IBQ then set Vs to 40mV pp and f10KHz Measure Av To measure Zi insert a variable resistor Rvi in series with Vs and change this resistor until the output voltage becomes half of its previous value The input resistance is Zi Rvi C the internal
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