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university:courses:electronics:electronics-lab-ce-loop-gain [27 Mar 2019 12:05] – [Questions:] add ltspice files Antoniu Miclausuniversity:courses:electronics:electronics-lab-ce-loop-gain [26 Jan 2021 15:58] (current) – [Directions:] Doug Mercer
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 ====Directions:==== ====Directions:====
  
-Build the measurement setup as shown in figure 5 below. If you are using the HPH1-1400L transformer for T<sub>1</sub> you should connect three of the 6 windings in series for the primary and the remaining three windings in series for the secondary ( see this [[university:courses:electronics:comms-lab-transformers|activity on transformers]] for more details ).+Build the measurement setup as shown in figure 5 below. If you are using the HPH1-1400L transformer for T<sub>1</sub> you should connect three of the 6 windings in series for the primary and the remaining three windings in series for the secondary ( see this [[university:courses:alm1k:alm-lab-transformers|Transformers]] for more details ).
  
 There are three resistors, R<sub>C</sub>, R<sub>B</sub>, R<sub>E</sub> and one capacitor, C<sub>M</sub>, that determine the loop gain of this circuit. You will be running frequency sweeps with the network analyzer testing various combinations of component values. There are three resistors, R<sub>C</sub>, R<sub>B</sub>, R<sub>E</sub> and one capacitor, C<sub>M</sub>, that determine the loop gain of this circuit. You will be running frequency sweeps with the network analyzer testing various combinations of component values.
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 The green squares indicate where to connect the ADALM2000 AWG, scope channels and power supplies. Be sure to turn on the power supplies only after you double check your wiring. The green squares indicate where to connect the ADALM2000 AWG, scope channels and power supplies. Be sure to turn on the power supplies only after you double check your wiring.
  
-Open the voltage supply control window to turn on and off the fixed +5 volt power supply. Open the Network Analyzer Instrument and set the sweep to start at 10 KHz and stop at 5 MHz. The Max gain should be set to 0.1X. Set the Amplitude to 3.5 V and the Offset to zero volts. Under the Bode scale set the magnitude top to 40 dB and range to 80 dB. Set the phase top to 180º and range to 360º. Under scope channels click on use channel 1 as reference. Set the number of steps to 500.+Open the voltage supply control window to turn on and off the fixed +5 volt power supply. Open the Network Analyzer Instrument and set the sweep to start at 10 KHz and stop at 5 MHz. The Max gain should be set to 0.1X. Set the Amplitude to 3.5 V peak-to-peak and the Offset to zero volts. Under the Bode scale set the magnitude top to 40 dB and range to 80 dB. Set the phase top to 180º and range to 360º. Under scope channels click on use channel 1 as reference. Set the number of steps to 500.
  
 ====Procedure:==== ====Procedure:====
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 <WRAP round download> <WRAP round download>
 **Resources:** **Resources:**
-  * LTSpice files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/ltspice/ce_loop_gain_ltspice | ce_loop_gain_ltspice]]+  * LTSpice files: [[downgit>education_tools/tree/master/m2k/ltspice/ce_loop_gain_ltspice | ce_loop_gain_ltspice]]
 </WRAP> </WRAP>
  
university/courses/electronics/electronics-lab-ce-loop-gain.txt · Last modified: 26 Jan 2021 15:58 by Doug Mercer

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