Title :
A 8 Gbps blind oversampling CDR with frequency offset compensation over infinite burst
Author :
Chowdhary, Amitabh ; Kaushik, Akhil ; Mandal, Sajal Kumar ; Chopra, Sonik ; Nandy, Turja ; Uppal, Vivek
Author_Institution :
STMicroelectron. Pvt. Ltd., Noida, India
Abstract :
This paper presents a 8 Gbps high jitter tolerance (JTOL) corner-frequency hybrid CDR that employs blind oversampling phase detector in conjunction with digital proportional integral controller (PIC) for phase/frequency tracking with +/-4000ppm frequency offset compensation over infinite burst. Need of the elasticity buffer has been obviated by using a method of time-varying divider ratios in word-clock generation. Analytical treatment of the CDR dynamics and insight into its JTOL are also presented. Short lock time and tracking over infinite burst make this CDR reusable across applications requiring either burst or continuous mode support. The device exhibits a JTOL corner-frequency of 50MHz and total jitter tolerance floor of 0.52 UI peak-to-peak @ BER of 10-10 in 28nm CMOS technology with 1.0V supply.
Keywords :
CMOS integrated circuits; PI control; clock and data recovery circuits; compensation; jitter; phase detectors; CMOS technology; PIC; bit rate 8 Gbit/s; blind oversampling CDR; blind oversampling phase detector; continuous mode support; digital proportional integral controller; elasticity buffer; frequency 50 MHz; frequency offset compensation; high jitter tolerance corner-frequency hybrid CDR; infinite burst; phase-frequency tracking; short lock time; size 28 nm; time-varying divider ratios; total jitter tolerance floor; voltage 1.0 V; word-clock generation; Clocks; Elasticity; Frequency conversion; Jitter; Quantization (signal); Receivers; Registers; clock and data recovery (CDR); integral gain; jitter tolerance; over sampling; proportional gain;
Conference_Titel :
European Solid State Circuits Conference (ESSCIRC), ESSCIRC 2014 - 40th
Conference_Location :
Venice Lido
Print_ISBN :
978-1-4799-5694-4
DOI :
10.1109/ESSCIRC.2014.6942117
