Design And Implementation Of A Frequency Synthesizer For An Ieee 802154 Zigbee Transceiver
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Design and Implementation of a Frequency Synthesizer for an IEEE 802.15.4/Zigbee Transceiver
Author | : Rangakrishnan Srinivasan |
Publisher | : |
Total Pages | : |
Release | : 2007 |
Genre | : |
ISBN | : |
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The frequency synthesizer, which performs the main role of carrier generation for the down-conversion/up-conversion operations, is a key building block in radio transceiver front-ends. The design of a synthesizer for a 2.4 GHz IEEE 802.15.4/Zigbee transceiver forms the core of this work. This thesis provides a step-by-step procedure for the design of a frequency synthesizer in a transceiver environment, from the mapping of standard-specifications to its integrated circuit implementation in a CMOS technology. The results show that careful system level planning leads to high-performance realizations of the synthesizer. A strategy of using different supply voltages to enhance the performance of each building block is discussed. A section is presented on layout and board level issues, especially for radio-frequency systems, and their effect on synthesizer performance. The synthesizer consumes 15.5 mW and meets the specifications of the 2.4 GHz IEEE 802.15.4/Zigbee standard. It is capable of 5 GHz operation with a VCO sensitivity of 135 MHz/V and a tuning range of 700 MHz. It can be seen that the adopted methodology can be used for the design of high-performance frequency synthesizers for any narrow-band wireless standard.
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