Berkeley ELENG 240A - Lecture 24: PLL and CDR Overview (7 pages)

Previewing pages 1, 2 of 7 page document View the full content.
View Full Document

Lecture 24: PLL and CDR Overview



Previewing pages 1, 2 of actual document.

View the full content.
View Full Document
View Full Document

Lecture 24: PLL and CDR Overview

92 views


Pages:
7
School:
University of California, Berkeley
Course:
Eleng 240a - Linear Integrated Circuits

Unformatted text preview:

EECS240 Spring 2010 Lecture 24 PLL and CDR Overview Elad Alon Dept of EECS Clock Generation N Typical low cost crystals give 500 MHz clock 5 Gb s link where to get a 5 GHz clock PLL multiply frequency up align phase While maintaining low jitter power EECS240 Lecture 24 2 2 PLL Linear Model N EECS240 Lecture 24 3 3 4 4 Linear Model cont d EECS240 Lecture 24 Stability and Loop Bandwidth EECS240 Lecture 24 5 5 Loop Components Phase Detectors Basic idea create pulses with width to phase difference EECS240 Lecture 24 6 6 Loop Filter EECS240 Lecture 24 7 7 Lecture 24 8 8 VCOs EECS240 Noise and Jitter EECS240 Lecture 24 9 9 Clock Recovery Skewed Ideal Voltage margin strongly dependent on exact sampling position How do we set the clock at the best place EECS240 Lecture 24 10 10 Conceptual CDR EECS240 Lecture 24 11 11 12 12 System Types Source Synchronous Same frequency phase Mesochronous Same frequency unknown phase Plesiochronous Almost same frequency From EE371 Stanford University EECS240 Lecture 24 Linear Hogge Phase Detector EECS240 Lecture 24 13 Bang Bang Alexander Phase Detector dn Vin data Clk en edge Clk Edge clock Tsym 2 away from data Derive early late from data and edge samples Dn dn en dn 1 dn Up dn en dn 1 dn EECS240 Lecture 24 14 14



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Lecture 24: PLL and CDR Overview and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Lecture 24: PLL and CDR Overview and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?