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An area-efficient hybrid ΔΣ modulator with a 6-bit shared asynchronous successive approximation register (ASAR) quantizer for audio application is proposed and demonstrated in a 28nm CMOS process. The modulator incorporates a 1st-order analog filter and a 1st-order digital filter, which enables high integration of digital signal processing at low power and small area. The 1st-order digital filter...
The impact of fiber nonlinearity on the crosstalk-induced OSNR penalties is experimentally analyzed for a hybrid 112-Gb/s PDM-QPSK transmission system. Both experimental and simulation results reveal an enhanced crosstalk effect in the nonlinear transport regime.
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