Title :
A phase locked loop with a mixed mode loop filter for clock/data recovery in optical disc drives
Author :
Wang, Ping-Ying ; Hsieh, Hsiang Ji ; Lin, Yung-Yu ; Yang, Meng-Ta ; Kao, Hsueh-Wu
Author_Institution :
Analog Circuit Design Div., MediaTek Inc., Hsin-Chu, Taiwan
Abstract :
A PLL with a mixed mode loop filter is designed to suppress the need for a large size capacitor in an analog clock/data recovery circuit and eliminates the need for a high resolution digital controlled oscillator (DCO) in a digital clock recovery circuit. The value of the capacitor in the mixed mode loop filter is 1/4 to 1/256 of that of a conventional loop filter and frequency quantization errors are smaller than that of a 16 bit DCO. The design was verified in the read channel of a digital versatile disc system at 478 Mbps and in the partial-response maximum-likelihood (PRML) detectors for a Blu-ray disc system at 264 Mbps.
Keywords :
CMOS integrated circuits; capacitance; delta-sigma modulation; integrated circuit design; mixed analogue-digital integrated circuits; optical disc storage; passive filters; phase locked loops; quantisation (signal); synchronisation; voltage-controlled oscillators; 16 bit; 264 Mbit/s; 478 Mbit/s; Blu-ray disc system; CMOS technology; VCO; analog clock recovery; analog data recovery; capacitor; circuit design; delta-sigma modulator; digital clock recovery; digital controlled oscillator; digital versatile disc; frequency quantization errors; mixed mode loop filter; optical disc drives; partial-response maximum-likelihood detectors; passive loop filter; phase locked loop; read channel; Capacitors; Circuits; Clocks; Digital control; Digital filters; Digital-controlled oscillators; Drives; Optical filters; Phase locked loops; Size control;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465758
