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A fast-hopping single-PLL 3-band MB-OFDM UWB synthesizer

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3 Author(s)
van de Beek, R.C.H. ; Philips Res. Labs., Eindhoven ; Leenaerts, D.M.W. ; van der Weide, G.

This paper describes a 3-band (mode 1) multi-band-OFDM UWB synthesizer implemented in a 0.25-mum SiGe BiCMOS process. The interference-robust, fast-hopping synthesizer uses one single-sideband (SSB) mixer for frequency shifting. A single phase-locked loop (PLL) generates the steady input signals for the SSB-mixer. Crucial in the design is a divide-by-5 frequency divider that generates quadrature signals at a frequency of 528 MHz. The 0.44 mm2 fully integrated synthesizer consumes 52 mW from a 2.7 V supply. Out-of-band spurious tones are below -50 dBc, allowing co-operability with WLAN applications in the 2.4 GHz and 5 GHz range. The integrated phase noise is below 2deg rms. The measured frequency transition time is well below the required 9.5 ns

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:41 ,  Issue: 7 )

Date of Publication:

July 2006

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