Abstract
This paper presents the architecture and circuit design of the reconfigurable frequency-modulated ultra-wideband (FM-UWB) transmitter for robust non-invasive short range communications. The transmitter employs a Δ-Σ fractional-N PLL with an amplitude-controlled quadrature relaxation VCO to generate a 2-FSK modulated triangular waveform. The differential triangular waveform outputs of the relaxation VCO directly modulate a dual-path LC VCO whose center frequency is set by a digitally configurable quasi-continuous frequency-locked loop (FLL) for nearly 600-MHz UWB signal generation. Experimental results of a 10 to 100 kb/s, 3.3 to 4.4 GHz FM-UWB transmitter in 0.18-μm CMOS are presented and future works are addressed.
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Zhou, B., Rhee, W., Kim, D. et al. Reconfigurable FM-UWB transmitter design for robust short range communications. Telecommun Syst 52, 1133–1144 (2013). https://doi.org/10.1007/s11235-011-9629-7
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DOI: https://doi.org/10.1007/s11235-011-9629-7