A Self-compensated, Bandwidth Tracking Semi-digital PLL Design in 65nm CMOS Technol-ogy

• Main Author: Yogesh, Mitesh
• Format: Others
• Language: English
• Published: Linköpings universitet, Elektroniksystem 2012
• Subjects: PLL; semi-digital; Bandwidth tracking; Adaptive bandwidth; Compensation; PVT; Self-Bias; charge-pump; VCO; 65nm
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-85143

In a conventional charge-pump based PLL design, the loop parameters such as the band-width, jitter performance, charge-pump current, pull-in range among others govern the ar-chitecture and implementation details of the PLL. Different loop parameter specificationschange with a change in the reference frequency and inmost cases, requires careful re-designof some of the PLL blocks. This thesis describes the implementation of a semi-digital PLLfor high bandwidth applications, which is self-compensated, low-power and exhibits band-width tracking for all reference frequencies between 40 MHz and 1.6 GHz in 65nm CMOStechnology.This design can be used for a wide range of reference frequencies without redesigning anyblock. The bandwidth can be fixed to some fraction of the reference frequency during designtime. In this thesis, the PLL is designed to make the bandwidth track 5% of the referencefrequency. Since this PLL is self-compensated, the PLL performance and the bandwidthremains same over PVT corners.