Title :
A 5Gb/s CDR with automatic frequency calibration
Author :
Yilmazer, Caglar ; Toker, Ali
Author_Institution :
Electron. & Commun. Eng. Dept., Istanbul Tech. Univ., Istanbul, Turkey
Abstract :
A new technique for VCO calibration is presented for clock and data recovery (CDR) circuits. This method is applicable to current controlled oscillators. After the frequency lock is achieved, the oscillator current is sampled by a simple current mode analog to digital converter (ADC) and a narrower range is generated around the sampled point. A CDR system, which operates at 5-Gb/s data rate, is designed and simulated in 0.18-mum CMOS technology to verify the proposed method.
Keywords :
CMOS integrated circuits; analogue-digital conversion; calibration; clock and data recovery circuits; voltage-controlled oscillators; CDR circuits; CMOS technology; VCO; analog to digital converter; automatic frequency calibration; clock and data recovery; current controlled oscillators; Automatic frequency control; CMOS technology; Calibration; Clocks; Phase frequency detector; Phase locked loops; Ring oscillators; Temperature distribution; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Signals, Circuits and Systems, 2009. ISSCS 2009. International Symposium on
Conference_Location :
Iasi
Print_ISBN :
978-1-4244-3785-6
Electronic_ISBN :
978-1-4244-3786-3
DOI :
10.1109/ISSCS.2009.5206194
