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

• Published in: IEEE journal of solid-state circuits 2006-07, Vol.41 (7), p.1522-1529
• Main Authors: van de Beek, R.C.H., Leenaerts, D.M.W., van der Weide, G.
• Format: Article
• Language: English
• Subjects: Amplitude modulation; Applied sciences; BiCMOS integrated circuits; Circuit properties; Circuits; Circuits of signal characteristics conditioning (including delay circuits); Consumption; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Frequency conversion; Frequency dividers; Frequency synthesizers; Germanium silicon alloys; Interference; Mixers; Noise; Orthogonal Frequency Division Multiplexing; Oscillators, resonators, synthetizers; Phase locked loops; Quadratures; Signal convertors; Signal design; Signal generators; Silicon germanides; Silicon germanium; Synthesizers; ultra-wideband; Wireless communication
• ISSN: 0018-9200; 1558-173X
• DOI: 10.1109/JSSC.2006.873922

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 mm 2 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