Abstract—An ultra-low-power low voltage fractional-N synthesizer with I, Q output for 401-406 MHz Medical Device Radio communications Service (Med Radio) receiver intended for wireless communication in biomedical sensor applications is implemented using 0.18-μm CMOS technology. The synthesizer consists of QVCO with external inductor, crystal oscillator, phase frequency detector, charge pump, prescaler and 2nd order delta sigma modulator. The fractional-N synthesizer achieves a phase noise of -106dBc/Hz at 100 kHz offset while consuming less than 0.6mW from a 1-V supply voltage and occupying 0.5 mm² of die area
Index Terms—CMOS, fractional-N synthesizer, low-voltage low-power radio.
The authors are with Institute of Microelectronics, A*STAR (Agency for Science, Technology and Research), 11 Science Park Road, Singapore Science Park II, Singapore 117685 (e-mail: yandl@ime.a-star.edu.sg).
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Cite: Dan Lei Yan, Zhao Bin, M. Kumarasamy Raja, and Minkyu Je, "A 1-V 600μA CMOS Fractional-N Synthesizer with External Inductor QVCO for Med Radio Receiver," International Journal of Information and Electronics Engineering vol. 2, no. 6, pp. 876-878, 2012.
