An integrated 0.38–6 GHz, 9–12 GHz fully differential fractional-N frequency synthesizer for multi-standard reconfigurable MIMO communication application
Abstract
A wide-band fully differential fractional-N frequency synthesizer for multi-standard application is presented. The single fully differential LC–VCO with 28.5 % tuning rang and a set of dividers, quadrature self-mixer are designed to accomplish the multi-frequency bands with the frequency band from 0.38 to 6 GHz and from 9.0 to 12 GHz. It covers several wireless standards. A novel high isolation multiplexer is presented to achieve the frequency band selection. This chip was implemented with 65 nm CMOS technology and the maximum consumption is 20.05 mA from 1.2 V power supply. It occupies an active area of 1.5 mm2. The measured typical phase noise of the frequency synthesizer is −114.6 dBc/Hz from 1 MHz offset for 4.85 GHz output.
Keywords
Full differential Frequency synthesizer Multi-standard Phase noise Quadrature self-mixer MultiplexerNotes
Acknowledgments
This work was supported by the National Natural Science Foundation of China under Grant No. 60976023, and National Science and Technology Major Project No. 2009ZX03007-001 and No. 2012ZX03004007-002.
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