1 / 13

Phase Locked Loop Design

Phase Locked Loop Design. Matt Knoll Engineering 315. Introduction. What is a PLL? Control System Representation Parts of a PLL PLL in Simulink. What is a PLL?. Digital frequency control system Generate high speed oscillations Acquire and track signals Radio Frequency Demodulation

darrel-vaughan
Télécharger la présentation

Phase Locked Loop Design

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Phase Locked Loop Design Matt Knoll Engineering 315

  2. Introduction • What is a PLL? • Control System Representation • Parts of a PLL • PLL in Simulink

  3. What is a PLL? • Digital frequency control system • Generate high speed oscillations • Acquire and track signals • Radio Frequency Demodulation • DX-ing • RF communications

  4. Control system representation

  5. Modeling a PLL

  6. PLL Control System

  7. Parts of a PLL • Phase Detector • Filter • Voltage Controlled Oscillator • Programmable Counter

  8. Parts of a PLL • Phase Detector • Acts as comparitor • Produces a voltage proportional to the phase difference between input and output signal • Voltage becomes a control signal

  9. Parts of a PLL • Filter • Determines dynamic characteristics of PLL • Specify Capture Range (bandwidth) • Specify Tracking Range • Receives signal from Phase Detector and filters accordingly

  10. Parts of a PLL • Voltage Controlled Oscillator • Set tuning range • Set noise margin • Creates low noise clock oscillation

  11. Parts of a PLL • Divider • Divides the VCO output by the degree of the open loop gain • Feedback loop allows phase comparison

  12. PLL in Simulink

  13. Questions?

More Related