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university:courses:alm1k:circuits1:alm-cir-9 [11 Oct 2018 16:22] – change figure numbers. Antoniu Miclausuniversity:courses:alm1k:circuits1:alm-cir-9 [14 Oct 2018 12:13] – add breadboard Antoniu Miclaus
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 1. Set up the filter circuit as shown in figure 1 on your solderless breadboard, with the component values R<sub>1</sub> = 1 KΩ, C<sub>1</sub> = 0.047 µF, L<sub>1</sub> =20 mH.  1. Set up the filter circuit as shown in figure 1 on your solderless breadboard, with the component values R<sub>1</sub> = 1 KΩ, C<sub>1</sub> = 0.047 µF, L<sub>1</sub> =20 mH. 
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 +{{ :university:courses:alm1k:circuits1:bpf_bb.png?500 |}}
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 +<WRAP centeralign>Figure 4, Band Pass Filter Connections</WRAP>
  
 2. Set the channel A AWG Min value to 0.5 and Max value to 4.5V to apply a 4Vp-p sine wave centered on 2.5 V as the input voltage to the circuit. From the AWG A Mode drop down menu select the SVMI mode. From the AWG A Shape drop down menus select Sine. From the AWG B Mode drop down menu select the Hi-Z mode. 2. Set the channel A AWG Min value to 0.5 and Max value to 4.5V to apply a 4Vp-p sine wave centered on 2.5 V as the input voltage to the circuit. From the AWG A Mode drop down menu select the SVMI mode. From the AWG A Shape drop down menus select Sine. From the AWG B Mode drop down menu select the Hi-Z mode.
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 Use the Start Frequency button to set the frequency sweep to start at 100 Hz and use the Stop Frequency button to the sweep to stop at 20000 Hz. Select CHA as the channel to sweep. Also use the Sweep Steps button to enter the number of frequency steps, use 100 as the number. Use the Start Frequency button to set the frequency sweep to start at 100 Hz and use the Stop Frequency button to the sweep to stop at 20000 Hz. Select CHA as the channel to sweep. Also use the Sweep Steps button to enter the number of frequency steps, use 100 as the number.
  
-You should now be able to press the green Run button and run the frequency sweep. After the sweep is completed ( could take a few seconds for 100 points ) you should see something like the screen shot in figure 4. You may want to use the LVL and dB/div buttons to optimize the plots to best fit the screen grid.+You should now be able to press the green Run button and run the frequency sweep. After the sweep is completed ( could take a few seconds for 100 points ) you should see something like the screen shot in figure 5. You may want to use the LVL and dB/div buttons to optimize the plots to best fit the screen grid.
  
 Record the results and save the Bode Plot using your favorite screen capture tool and include it in your lab report. Record the results and save the Bode Plot using your favorite screen capture tool and include it in your lab report.
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 {{ :university:courses:alm1k:circuits1:alm-cir-lab9-screen1.png?600 |}} {{ :university:courses:alm1k:circuits1:alm-cir-lab9-screen1.png?600 |}}
  
-<WRAP centeralign>Figure 4: Bode Analyzer Settings</WRAP>+<WRAP centeralign>Figure 5: Bode Analyzer Settings</WRAP>
  
-To better understand the frequency characteristics of this parallel LC filter plot the low pass frequency response with just the capacitor (i.e. remove the inductor). Make the same frequency sweep and take a snap-shot of the gain ( CB-db - CA-dB ) and relative phase ( CA-CB ). Now plot the high pass frequency response with just the inductor (i.e. put the inductor back and remove the capacitor). The Bode plot in figure 5 shows these results. Note that the frequency where the low pass and high pass gain is the same and the relative phase sums to zero ( at about +70 and -70 degrees) is at the resonate frequency.+To better understand the frequency characteristics of this parallel LC filter plot the low pass frequency response with just the capacitor (i.e. remove the inductor). Make the same frequency sweep and take a snap-shot of the gain ( CB-db - CA-dB ) and relative phase ( CA-CB ). Now plot the high pass frequency response with just the inductor (i.e. put the inductor back and remove the capacitor). The Bode plot in figure 6 shows these results. Note that the frequency where the low pass and high pass gain is the same and the relative phase sums to zero ( at about +70 and -70 degrees) is at the resonate frequency.
  
 {{ :university:courses:alm1k:circuits1:alm-cir-lab9-screen2.png?600 |}} {{ :university:courses:alm1k:circuits1:alm-cir-lab9-screen2.png?600 |}}
  
-<WRAP centeralign>Figure 5: Low and High pass response</WRAP>+<WRAP centeralign>Figure 6: Low and High pass response</WRAP>
  
 ====Questions: ==== ====Questions: ====
university/courses/alm1k/circuits1/alm-cir-9.txt · Last modified: 03 Nov 2021 20:18 by Doug Mercer

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