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Presented is a self-tracking charge pump (ST-CP) that can deliver a non-constant current over the output voltage range for a fast-locking phase-locked loop (PLL). It features a simple self-bias self-tracking architecture that can reduce, simultaneously, the PLL locking time and the current mismatch in charge and discharge phases. Experimentally verified in a 0.18 ??m CMOS process, the proposed ST-CP...
A phase shift keying demodulator featuring miniaturisation and ultra-low power is presented. By taking advantage of a high signal-to-noise ratio on wirelessly power-combined data transmission, the demodulation can be performed without the carrier recovery circuits requiring phase lock loop, making the design quite competitive with those currently demonstrated in the literature.
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