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This paper discusses the design of a battery-less wirelessly-powered UWB system-on-a-chip (SoC) tag for area-constrained localization applications. An antenna-rectifier co-design methodology optimizes sensitivity and increases range under tag area constraints. A low-voltage (0.8-V) UWB TX enables high rectifier sensitivity by reducing required rectifier output voltage. The 2.4GHz rectifier, power-management...
CMOS LC voltage-controlled oscillators (VCO) with octave frequency tuning-range (FTR) are attractive for wideband radios. An area and power-efficient resonant mode-switching approach is presented that enables wide-FTR oscillators without compromising inductor Q, resulting in low phase noise and high VCO Figure-of-Merit (FoM). The proposed series resonator mode-switching approach results in a 6.4GHz...
A PSK receiver (RX) is proposed that employs a digital-intensive architecture based on sub-sampling, Q-enhancement, and digital IF to enable low-power (1.3 mW) and low-voltage (0.6 V) operation. Implemented in 65 nm CMOS, this work is compatible with the IEEE 802.15.6 (WBAN) narrowband physical layer specification and achieves 91 dBm and 96 dBm sensitivity at 10 BER for -DQPSK and ...
This paper presents a scalable phased-array receiver system that covers a tritave bandwidth of 6-to-18 GHz implemented in a 130nm CMOS process. The single receiver element with a 10-bit phase shifting resolution achieves a maximum phase error of 2.5° within a baseband amplitude variation of 1.5dB for an arbitrary target angle. This dense interpolation provides excellent phase error/offset calibration...
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