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university:courses:electronics:electronics-lab-12 [22 Jan 2019 14:14]
Antoniu Miclaus add ltspice files
university:courses:electronics:electronics-lab-12 [23 Aug 2019 13:07]
Antoniu Miclaus
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-====== Activity ​12. BJT Differential pair ======+====== ActivityBJT 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:​** **Resources:​**
   * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​bjt_diff_pair_bb | bjt_diff_pair_bb ]]   * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​bjt_diff_pair_bb | bjt_diff_pair_bb ]]
   * LTspice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​ltspice/​bjt_diff_pair_ltspice | bjt_diff_pair_ltspice ]]   * LTspice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​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.txt · Last modified: 25 Jun 2020 22:07 (external edit)