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An ultra-low power mixed-signal Gaussian frequency shift keying (GFSK) demodulator for wireless body area networks (WBAN) is introduced. A novel multi-threshold instant phase zero-crossing detector (MIPZCD) which is composed of a 2-stage poly-phase filter (PPF), an instant phase calculator and an adaptive multi-threshold quantizer is proposed to improve the demodulator phase accuracy and data rate...
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