Title :
A wide range PLL for 64X speed CD-ROMs & 10X speed DVD-ROMs
Author :
Lee, Jae Shin ; Jin, Woo Kang ; Choi, Dong Myung ; Lee, Gun Sang ; Kim, Suki
Author_Institution :
Dept. of Electron. Eng., Korea Univ., Seoul, South Korea
fDate :
8/1/2000 12:00:00 AM
Abstract :
In this paper, we propose a wide range PLL (phase locked loop) for 64X speed CD-ROMs and 10X speed DVD-ROMs. In order to develop a PLL with a wide locking range we designed a dual loop scheme which consists of a frequency detection loop and phase detection loop. The PLL has a locking range of 75 MHz-370 MHz A new V-I converter and a differential delay cell are used in a 3-stage ring VCO to reduce jitters. In addition, we propose a new charge pump which has perfect current matching characteristics for sourcing/sinking currents. This new charge pump improves the phase offset that reduces the locking range of the PLL. Implemented in a 0.25 μm, 1-poly 5-metal CMOS process. It occupies an active area of 1.8 mm*1.1 mm
Keywords :
CD-ROMs; CMOS integrated circuits; jitter; phase locked loops; video discs; 1-poly 5-metal CMOS process; 10X speed DVD-ROMs; 3-stage ring VCO; 64X speed CD-ROMs; 75 to 370 MHz; V-I converter; charge pump; current matching characteristics; differential delay cell; dual loop scheme; frequency detection loop; jitters; phase detection loop; phase locked loop; phase offset; sourcing/sinking currents; wide range PLL; CMOS process; Charge pumps; DVD; Delay; Frequency locked loops; Jitter; Phase detection; Phase frequency detector; Phase locked loops; Voltage-controlled oscillators;
Journal_Title :
Consumer Electronics, IEEE Transactions on
