Design of Low Spur Fast Settling Integer-N Frequency Synthesizer for Bluetooth Application

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Choopani, Armin | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51643 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Safarian, Amin Ghasem; Atarodi, Mojtaba
Abstract:
Frequency synthesizers are one of the most critical building blocks of RF systems. Their task is to produce high-frequency precise and stable clock signals from a low-frequency source. The signal used in mixers to up-convert and down-convert desired signals in transceivers and the precise clock of analog to digital converters are made by frequency synthesizers. Designing frequency synthesizer, because of its lots of parameter and dependency of these parameters to each other, is a hard task which forces designers to propose new structures. In this thesis, an integer-N frequency synthesizer for Bluetooth application, with the goals of decreasing spurious tones power and settling time, is designed in 180 nm CMOS technology. With techniques used in loop filter, the power of fundamental, as well as higher-order harmonics of the reference spur, are reduced. Also, settling time had been decreased from 126 to 86 which is equals to 32% improvement. The total current consumption is 7 mA from 1.8 V power supply
Keywords:
Integer Frequency Synthesizer ; SPURS ; Settling Time ; Fast Settling ; Bandwidth ; Bluetooth Thechnology

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