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university:courses:electronics:electronics-lab-5 [05 Mar 2019 11:05]
amiclaus
university:courses:electronics:electronics-lab-5 [12 Jul 2019 13:02] (current)
andreeapop
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-====== Activity ​5. Common Emitter Amplifier ======+====== ActivityCommon Emitter Amplifier ======
  
 ===== Objective: ===== ===== Objective: =====
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 {{ :​university:​courses:​electronics:​a5_e2.png?​200 |}} {{ :​university:​courses:​electronics:​a5_e2.png?​200 |}}
  
-Alternately,​ the curve tracer circuit from activity ​4. can be modified slightly, (might be simplest way since it was already constructed in the earlier section) to produce a common emitter amplifier test circuit shown below. All the attributes are basically the same with two slight advantages. One is the base current bias is no longer dependent on the exponential base voltage (V<​sub>​BE</​sub>​). The second is the summation of the small AC signal from the attenuated AWG 1 output is independent of the base bias circuit and does not need to be AC coupled. The small signal AC input is applied to the non-inverting terminal of the op-amp and thus due to the negative feedback also appears at the base of the transistor (inverting op-amp input).+Alternately,​ the curve tracer circuit from activity ​can be modified slightly, (might be simplest way since it was already constructed in the earlier section) to produce a common emitter amplifier test circuit shown below. All the attributes are basically the same with two slight advantages. One is the base current bias is no longer dependent on the exponential base voltage (V<​sub>​BE</​sub>​). The second is the summation of the small AC signal from the attenuated AWG 1 output is independent of the base bias circuit and does not need to be AC coupled. The small signal AC input is applied to the non-inverting terminal of the op-amp and thus due to the negative feedback also appears at the base of the transistor (inverting op-amp input).
  
 {{ :​university:​courses:​electronics:​a5_f2.png?​500 |}} {{ :​university:​courses:​electronics:​a5_f2.png?​500 |}}
university/courses/electronics/electronics-lab-5.txt · Last modified: 12 Jul 2019 13:02 by andreeapop