Please go to update pages for the latest modification, class-wise issues, and others if links for those pages exist.
update page a  update page b   update page c

Lab work modification:

Continued from page 3

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Part C: Band-pass filter

Step 0

Background on the band-pass filter



3D plot of bandpass filter transfer function. Red lines: contour of constant magnitude. Blue lines: contour of constant phase.







Part C
Step 1
 
Frequency response: Please see the circuit simulation app for theoretical calculation, to be compared with experimental measurements. Below is an example: the results of the circuit in the photo.



Theory: From circuit simulation app:
Bode magnitude                                                         Bode phase
  


Experiment: For the actual circuit in the photograph:
Bode magnitude                                                          Bode phase
   

Theoretical fit of data (with fitted component values and actual op amp response) shows excellent agreement between theoretical model (dashed green curve) and experimental result (magenta points).
  


Theory: From circuit simulation app:
Nyquist 2D  



Experiment: For the actual circuit in the photograph:
Nyquist 2D                                                                           Nyquist 3D (white horizontal arrow is Log frequency)
      
                                                                                        


Step 2
Step response
Theory: Circuit simulation:







Experimental result:






Step 3
Impulse response





End of Part C

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