An IQ processor in 0.18μ CMOS implements Bluetooth low-IF functions at 2MHz with 7th-order complex Bessel bandpass IF filter, limiter, quadricorrelator baseband FM demodulator, and differential slope sensing bit slicer. The sensitivity is -46dBm at 0.1% BER. The chip consumes 50mW at 1.8V and occupies 2mm×2.8mm.
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