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university:courses:electronics:electronics-lab-variable-gain-amplifier [26 Mar 2018 13:48] – add Questions and Further Reading Antoniu Miclausuniversity:courses:electronics:electronics-lab-variable-gain-amplifier [23 Aug 2019 15:14] – Antoniu Miclaus
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 Consider the circuit schematic presented in Figure 1. Consider the circuit schematic presented in Figure 1.
  
-<WRAP centeralign> {{:university:courses:electronics:var_gain_amp_crl-sch.png|}} </WRAP>+<WRAP centeralign> {{ :university:courses:electronics:vctrl_amp_transistor.png|}} </WRAP>
  
 <WRAP centeralign> Figure 1. Voltage control using transistor </WRAP> <WRAP centeralign> Figure 1. Voltage control using transistor </WRAP>
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 ==== Procedure ==== ==== Procedure ====
  
-Use the first waveform generator as source Vin to provide a 2V amplitude, 1 kHz sine wave excitation to the circuit. Use the second waveform generator for controlling the transistor, providing a 2V amplitude, 1Hz square wave excitation. Supply the op amp to +/- 5V from the power supply. Configure the scope so that the input signal is displayed on channel 1 and the output signal is displayed on channel 2.+Use the first waveform generator as source Vin to provide a 2V amplitude peak-to-peak, 1 kHz sine wave excitation to the circuit. Use the second waveform generator for controlling the transistor, providing a 2V amplitude, 1Hz square wave excitation. Supply the op amp to +/- 5V from the power supply. Configure the scope so that the input signal is displayed on channel 1 and the output signal is displayed on channel 2.
  
 An animated plot is presented in Figure 3. An animated plot is presented in Figure 3.
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 Consider the circuit schematic presented in Figure 4. Consider the circuit schematic presented in Figure 4.
  
-<WRAP centeralign> {{:university:courses:electronics:var_gain_amp_pot2-sch.png?500|}} </WRAP>+<WRAP centeralign> {{ :university:courses:electronics:var_g_invert_amp_pot.png|}} </WRAP>
  
 <WRAP centeralign> Figure 4. Variable Gain Inverting Amplifier using potetiometer </WRAP> <WRAP centeralign> Figure 4. Variable Gain Inverting Amplifier using potetiometer </WRAP>
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 ==== Procedure ==== ==== Procedure ====
  
-Use the first waveform generator as source Vin to provide a 2V amplitude, 1 kHz sine wave excitation to the circuit.  Supply the op amp to +/- 5V from the power supply. Configure the scope so that the input signal is displayed on channel 1 and the output signal is displayed on channel 2.+Use the first waveform generator as source Vin to provide a 2V amplitude peak-to-peak, 1 kHz sine wave excitation to the circuit.  Supply the op amp to +/- 5V from the power supply. Configure the scope so that the input signal is displayed on channel 1 and the output signal is displayed on channel 2.
  
 By varying the value of the potentiometer, an animated plot is presented in Figure 6. By varying the value of the potentiometer, an animated plot is presented in Figure 6.
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 Consider the circuit schematic presented in Figure 7. Consider the circuit schematic presented in Figure 7.
  
-<WRAP centeralign> {{:university:courses:electronics:var_gain_amp_pot-sch.png?500|}} </WRAP>+<WRAP centeralign> {{ :university:courses:electronics:var_gain_inv_noninv.png|}} </WRAP>
  
 <WRAP centeralign> Figure 7. Variable Gain Inverting/Non-Inverting Amplifier using potetiometer </WRAP> <WRAP centeralign> Figure 7. Variable Gain Inverting/Non-Inverting Amplifier using potetiometer </WRAP>
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 ==== Procedure ==== ==== Procedure ====
  
-Use the first waveform generator as source Vin to provide a 2V amplitude, 1 kHz sine wave excitation to the circuit.  Supply the op amp to +/- 5V from the power supply. Configure the scope so that the input signal is displayed on channel 1 and the output signal is displayed on channel 2.+Use the first waveform generator as source Vin to provide a 2V amplitude peak-to-peak, 1 kHz sine wave excitation to the circuit.  Supply the op amp to +/- 5V from the power supply. Configure the scope so that the input signal is displayed on channel 1 and the output signal is displayed on channel 2.
  
 By varying the value of the potentiometer, an animated plot is presented in Figure 9. By varying the value of the potentiometer, an animated plot is presented in Figure 9.
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 ===== Further Reading ===== ===== Further Reading =====
 +
 +<WRAP round download>
 +**Lab Resources:**
 +  * Fritzing files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/fritzing/var_gain_amp_bb | var_gain_amp_bb]]
 +  * LTspice files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/ltspice/var_gain_amp_ltspice | var_gain_amp_ltspice]]
 +</WRAP>
  
 Some additional resources: Some additional resources:
university/courses/electronics/electronics-lab-variable-gain-amplifier.txt · Last modified: 03 Jan 2021 22:21 by Robin Getz

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