PowerWise® Design University

Advanced PLL Concepts

Advanced PLL Concepts



Objective: To review and test the advanced concepts of PLL circuit design.

Length: 90 minutes

Published Date: Jul 30, 04

Step(s) to complete

  1. View online seminar
  2. Complete the suggested assignments
Online Seminar: Advantages and Pitfalls of Using Fractional N PLLs

About the Presentor: Dean Banerjee, Deborah Brown, and Khang Nguyen

This seminar discusses various issues related to passive loop filter designs and presents new techniques using EasyPLL for optimizing passive loop filters for better performance.  Also view Loop Filter Optimization online seminar.Loop Filter Optimization

Take the Advanced Quizzes in the following topics:

  1. Non-PLL Radio Frequency (RF) Basics
  2. PLL Building Blocks
  3. PLL Performance
  4. Fractional PLLs
  5. National's PLL tools

About the Instructor: Dean Banerjee is a Senior Wireless Applications Engineer with National Semiconductor's Wireless Products division and is the author of "PLL Performance, Simulation, and Design". During this time, he has assisted in the development and support of various PLL synthesizer chips.
Suggested Assignments

Reading Assignment:

  1. Non-PLL Radio Frequency 
  2. PLL Building Blocks 
  3. PLL Performance 
  4. Fractional N PLLs 
  5. Loop Filter Optimization 
  6. WEBENCH® EasyPLL Online Simulation Tools help
  7. WIRELESS.NATIONAL.COM

Additional Resources:

Research Assignment:

  1. What are the three different types of fractional compensation methods? Briefly define them.
  2. What performance parameters does the loop filter affect?
  3. If I keep the same comparison frequency, but double the N counter value, what is the impact on phase noise inside the loop bandwidth?
  4. If a 1 GHz signal and a 900 MHz signal are input to a mixer:
    What are the frequencies of the two intermodulation products?
  5. If I have a comparison frequency of 200 KHz, approximately what is the minimum loop bandwidth I can have to change from 889 - 915 MHz to a 1 KHz tolerance in less than 500 uS?

    CHECK ALL ANSWERS HERE
Back to Main Campus     Back to School of Analog Design