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Volume & Issue no: Volume 4, Issue 3, March 2015

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Title:
Multipass Ring Oscillator Based Dual loop PLL for High frequency Synthesizers
Author Name:
Daphni S, Bamini S, Ann Rose J, Priya J, Thavasumony D
Abstract:
ABSTRACT High frequency PLL architecture with low noise, low spur and less area has been used in telecommunication based applications such as FM Receiver, which is part of a multi-radio System-on-Chip (SOC). In order to have long lasting battery backup, electronic gadgets such as smart phones and tablets are operating with low frequency reference clock that is 60MHz frequency. PLLs are playing vital role in generating multiple stable clock frequency needed by multi-radio system. In this project, a 4.6 GHz Multipass voltage controlled ring oscillator based dual loop PLL is proposed. Aperture phase detection mechanism along with phase to analog voltage convertor is used for the designing of low inband noise PLL. A newly designed multipass voltage controlled ring oscillator is proposed to reduce effective stage delay and thereby increasing the slew rate of generated signal. The proposed PLL is fabricated in a standard 0.18μm CMOS process using Mentor graphics Pyxis schematic software Tool. Mentor Graphics Pyxis tool is used for implementing the modules of PLL. Transient and Noise analysis has been performed and compared with the existing PLL. Area of the PLL is optimized considerably by properly choosing the circuitry of internal blocks with less number of transistors without compensating overall performance of system. Keywords: Phase Frequency Detector (PFD), Aperture Phase Detector (APD), Voltage Controlled Oscillator (VCO), True Single Phase Clocked (TSPC), Frequency Locked Aid (FLA), Mentor Graphics Pyxis.
Cite this article:
Daphni S, Bamini S, Ann Rose J, Priya J, Thavasumony D , " Multipass Ring Oscillator Based Dual loop PLL for High frequency Synthesizers " , International Journal of Application or Innovation in Engineering & Management (IJAIEM) , Volume 4, Issue 3, March 2015 , pp. 101-107 , ISSN 2319 - 4847.
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