A low jitter supply regulated charge pump PLL with self-calibration

• 作 者: 陈敏 刘云涛 李志超 肖璟博 陈杰
• 机 构: Institute of Microelectronics Chinese Academy of Sciences,College of Information and Communication E
• 出 处: Journal of Semiconductors
• 发表日期: 2016年01期
• 关键词: jitter calibration oscillator automatically compensated tunable tuning Figure re

This paper describes a ring oscillator based low jitter charge pump PLL with supply regulation and digital calibration. In order to combat power supply noise, a low drop output voltage regulator is implemented.The VCO gain is tunable by using the 4 bit control self-calibration technique. So that the optimal VCO gain is automatically selected and the process/temperature variation is compensated. Fabricated in the 0.13 m CMOS process, the PLL achieves a frequency range of 100–400 MHz and occupies a 190 200 m~2 area. The measured RMS jitter is 5.36 ps at a 400 MHz operating frequency.

This paper describes a ring oscillator based low jitter charge pump PLL with supply regulation and digital calibration. The VCO gain is tunable by using the 4 bit control self-calibration technique. So that the optimal VCO gain is automatically selected and the process / temperature variation is compensated. Fabricated in the 0.13 m CMOS process, the PLL achieves a frequency range of 100-400 MHz and occupies a 190 200 m ~ 2 area. The measured RMS jitter is 5.36 ps at a 400 MHz operating frequency.