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Low Power and Area Efficient Semi-Digital PLL Architecture for High Brandwidth Applications
Linköping University, Department of Electrical Engineering, Electronics System.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The main scope of this thesis is to implement a new architecture of a high bandwidth phase-locked loop (PLL) with a large operating frequency range from 100~MHz to 1~GHz in a 150~$nm$ CMOS process. As PLL is the time-discrete system, the new architecture is mathematically modelled in the z-domain. The charge pump provides a proportionally damped signal, which is unlikely as a resistive or capacitive damping used in the conventional charge pump. The new damping results in a less update jitter and less peaking to achieve the lock frequency and fast locking time of the PLL. The new semi-digital PLL architecture uses $N$ storage cells. The $N$ storage cells is used to store the oscillator tuning information digitally and also enables analogue tuning of the voltage controlled oscillator (VCO). The storage cells outputs are also used for the process voltage temperature compensation. The phase-frequency detector (PFD) and VCO are implemented like a conventional PLL. The bandwidth achieved is 1/4th of the PFD update frequency for all over the operating range from 100~MHz to 1~GHz. The simulation results are also verified with the mathematical modelling. The new architecture also consumes less power and area compared to the conventional PLL.

Place, publisher, year, edition, pages
2011. , 136 p.
Keyword [en]
PLL, High Bandwidth, Low Power, Semi-Digital PLL, Real Time Clock
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-71029ISRN: LiTH-ISY-EX--11/4439--SEOAI: diva2:444101
Subject / course
Electronics Systems
2011-09-06, Nollstallet, Linkoping University, Linkoping, 10:00 (English)
Available from: 2011-09-28 Created: 2011-09-27 Last updated: 2011-09-28Bibliographically approved

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Elangovan, Vivek
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