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university:courses:electronics:electronics-lab-12 [05 Sep 2017 14:43] – add breadboard circuits + plots Antoniu Miclausuniversity:courses:electronics:electronics-lab-12 [25 Jun 2020 22:07] (current) – external edit 127.0.0.1
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-====== Activity 12. BJT Differential pair ======+====== Activity: BJT Differential pair ======
  
 ===== Objective: ===== ===== Objective: =====
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 <WRAP centeralign> Figure 3 Differential pair with tail resistor Breadboard Circuit </WRAP> <WRAP centeralign> Figure 3 Differential pair with tail resistor Breadboard Circuit </WRAP>
  
-The first waveform generator should be configured for a 200 Hz Triangle wave with 4 volts amplitude and 0 offset. The second generator should be configured also for a 200 Hz Triangle wave with 4 volts amplitude and 0 volts offset but with 180 degree phase. The resistor dividers will reduce the signal amplitude seen at the bases of Q<sub>1</sub>and Q<sub>2</sub>to slightly less than 200 mV. Channel one of the scope should be connected with 1+ to the output of the first generator, W1 and 1- connected to W2. Channel 2 should be connected to display 2+ and 2- and set to 1V per division.+The first waveform generator should be configured for a 200 Hz Triangle wave with 4 volts amplitude peak-to-peak and 0 offset. The second generator should be configured also for a 200 Hz Triangle wave with 4 volts amplitude peak-to-peak and 0 volts offset but with 180 degree phase. The resistor dividers will reduce the signal amplitude seen at the bases of Q<sub>1</sub>and Q<sub>2</sub>to slightly less than 200 mV. Channel one of the scope should be connected with 1+ to the output of the first generator, W1 and 1- connected to W2. Channel 2 should be connected to display 2+ and 2- and set to 1V per division.
  
 ===== Procedure: ===== ===== Procedure: =====
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 Repeat the common mode gain measurements on the circuit shown in figure 3 with the tail current source. How has the result changed and why. Repeat the common mode gain measurements on the circuit shown in figure 3 with the tail current source. How has the result changed and why.
 +
 +<WRAP round download>
 +**Resources:**
 +  * Fritzing files: [[downgit>education_tools/tree/master/m2k/fritzing/bjt_diff_pair_bb | bjt_diff_pair_bb ]]
 +  * LTspice files: [[downgit>education_tools/tree/master/m2k/ltspice/bjt_diff_pair_ltspice | bjt_diff_pair_ltspice ]]
 +</WRAP>
  
 **Return to Lab Activity [[university:courses:electronics:labs|Table of Contents]]** **Return to Lab Activity [[university:courses:electronics:labs|Table of Contents]]**
  
  
university/courses/electronics/electronics-lab-12.1504615425.txt.gz · Last modified: 05 Sep 2017 14:43 by Antoniu Miclaus

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