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Mohammad Gholami

Work place: Dept. of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran

E-mail: mgh_elec@yahoo.com

Website:

Research Interests: Engineering

Biography

Mohammad Gholami was born in Babol, Iran in 1986. He received the B.Sc. in Electronic Engineering from Mazandaran University (Babol Noshirvani University of Technology), Babol, Iran in 2008. He also received the M.Sc. in Micro Electronic field from Sharif University of Technology, Tehran, Iran in 2010.  Now he is a Ph.D. student in the field of Analog Circuit Design in Babol Noshirvani University of Technology, Babol, Iran. From 2013 he has been a member of the Electrical and Electronic Engineering Faculty at Mazandaran University. His current research interests include the analysis and design of radio frequency CMOS integrated circuits and systems, mixed signal circuit design, digital and analog circuit design and designing of DLL or PLL based frequency synthesizers.

Author Articles
A Noise and Mismatches of Delay Cells and Their Effects on DLLs

By Mohammad Gholami Gholamreza Ardeshir Hossein Miar-Naimi

DOI: https://doi.org/10.5815/ijisa.2014.05.03, Pub. Date: 8 Apr. 2014

Jitter is one of the most important parameters in design of delay locked loop (DLL) based frequency synthesizer. In this paper noise and mismatches of conventional delay cells which are mainly used in the DLLs architecture are introduced completely. First, time domain equations related to noise and mismatches of conventional delay cells are reported. Then, these equations are used to calculate jitter of DLL due to mismatch and noise of delay cells. At last closed form equations are obtained which can be used in the designing of low jitter DLLs. To validate these equations, a conventional DLL is designed in TSMC 0.18um CMOS Technology.

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