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To increase the operating range and applicability of remotely powered devices an electro-magnetic energy harvester is developed in a 0.13 μm low cost CMOS technology. The presented system converts RF power to DC power to supply wireless sensor nodes, active transmitters or related systems with a power consumption up to the mW range. The chip includes an ultra low power control unit and consumes only...
In this paper, a technique to improve the output swing of the charge pump (CP) block is introduced. CPs are one of the important building blocks of phase-locked loops (PLLs) and PLL-based clock and data recovery (CDR) systems. The proposed feedback-based approach ensures that the currents of the two current sources in the CP maintain their values over an extended range of the charge-pump output voltage...
This paper presents phase-locked loop (PLL) reference-spur reduction design techniques exploiting a sub-sampling phase detector (SSPD) (which is also referred to as a sampling phase detector). The VCO is sampled by the reference clock without using a frequency divider and an amplitude controlled charge pump is used which is inherently insensitive to mismatch. The main remaining source of the VCO reference...
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