Umakanta Nanda

Work place: Department of Electronics and Communication Engineering, Silicon Institute of Technology, Bhubaneswar, India

E-mail: uk_nanda@yahoo.co.in

Website:

Research Interests: Computer systems and computational processes, Computer Architecture and Organization, Embedded System, Processor Design, Data Structures and Algorithms, Algorithm Design

Biography

Umakanta Nanda received MTech degree in Electronics and Communication engineering from National Institute of Technology, Rourkela, India, and is currently perusing PhD in the area of Analog and mixed signal VLSI designs at National Institute of Technology, Rourkela, India. His research interests is analog and mixed signal integrated circuits and application specific processor design, and embedded systems design.

Author Articles
Study of Recent Charge Pump Circuits in Phase Locked Loop

By Umakanta Nanda Jyotirmayee Sarangi Prakash Kumar Rout

DOI: https://doi.org/10.5815/ijmecs.2016.08.08, Pub. Date: 8 Aug. 2016

This paper reviews the design of phase locked loop (PLL) using recently reported charge pump circuits. Lock time, phase noise, lock range and reference spur of each charge pump circuit are investigated. Though improved charge pump circuits are designed recently, their performance is not as effective as the basic charge pump PLL (CP-PLL). Initially the design of PLL using the basic charge pump is completed in this paper and then the PLL using improved charge pumps are redesigned in CMOS 180 nm technology and simulated using Cadence Virtuoso Analog Design Environment. Finally all the charge pumps are compared with respect to the PLL performances. The current starved voltage controlled oscillator (VCO) used for the design of PLL brings about a tuning range of 119.5 MHz to 2.3 GHz. The PLL using different charge pumps produces a lock time which varies from 204 ns to 329 ns. The other parameters like lock range, phase noise and reference spur are also examined.

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