Module 7a Assignment-- Simulate RF and DC chokes (20 points)

Module 7 -- Amplifiers

Assignment 7a: Simulate RF Chokes and DC Blocks (20 points)

Instructions

 (Links to an external site.)1) Read about RF chokes and DC blocks in Module 7: Learning Materials 

2) Here is the amplifier circuit we discussed in class

http://www.emagtech.com/wiki/index.php/RF_Tutorial_Lesson_8:_Designing_an_RF_Bipolar_Junction_Transistor_Amplifier_with_Lumped_Matching_Networks Links to an external site.

Here is the example done in ADS. Use a generic BJT, but turn the power down a lot (-30 dB worked for me). If you put in too much power (try it!) you will see the amplifier become nonlinear and give you some really weird values.

Identify which elements are RF blocks, DC blocks, what makes up the biasing network for the transistor, and which are the input and output matching circuits.

3) Simulate this circuit in ADS. Use the transient simulation, so you can see AC and DC signals separately.

4) Look at the voltages at all of the nodes in the circuit with the AC and DC blocks in place (the way the circuit is originally shown). Then, remove them, and see how the signals change.

5) Discuss your findings.

Useful Resources

Submit

Submit your summary of diodes.

To submit on Canvas: Click the SUBMIT button that is associated with this assignment. Use one of the following methods to submit your assignment

• Copy and paste or type your paper in the text area
• Upload your paper in .doc, .docx, or .pdf format 

Grading

Your paper will be graded according to the following criteria: