Lab 7. Active Band Pass Filters
Laboratory Work
This lab will focus on the basic thing in active circuit designs, including how to create
schematics in ADS. Building Active Band Pass Filters in ADS:
Step 1: Build the following circuit with the same components values and pay special attention
to the marked components values:
Step 2: Select Simulation-AC and drag AC to the design environment. Input the related
parameters as below.
Step 3: You can either set the voltage gain equation in the schematic (in Lab 5) or the data
display (Lab 6). Please plot the voltage gain curve and attached the screen shot below. (30
marks)
Please answer the questions below:
What is the variation trend of Gain with frequency? try to explain why. (20 marks)
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Step 4. Based on the same filter structure apply 50 Ohm terminals to the input and output
port, and run both AC and S-parameter simulations within the same frequency range.
Attach the screenshots of S21 and voltage gain below (30 marks)
Please answer the questions below:
What are the values of S21 and voltage gain in the filters passband? And why are they different?
?20 marks?
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