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CMOS Integrated Magnetless Circulators Based on Spatiotemporal Modulation Angular-Momentum Biasing [article]

Ahmed Kord, Mykhailo Tymchenko, Dimitrios Sounas, Harish Krishnaswamy,, Andrea Alù
2019 arXiv   pre-print
Compared to previous discrete implementations of STM-AM circulators, the presented CMOS chip reduces the form factor by at least an order of magnitude and occupies a total area of only 36 mm2.  ...  We also validate the analysis with simulated and measured results using a standard 180 nm CMOS technology, showing good performance.  ...  Singh of MaxLinear Inc. and Prof. R. Gharpurey of the University of Texas at Austin for their advice on various technical issues.  ... 
arXiv:1902.06935v2 fatcat:qmhu4foysjddpcdt26bypyyd7y

Advances in Microelectronics for Implantable Medical Devices

Andreas Demosthenous
2014 Advances in Electronics  
Many of today's implantable devices use wireless technology to supply power and provide communication. There are many challenges when creating an implantable device.  ...  This paper provides a review of advances in microelectronics over the last decade or so for implantable medical devices and systems.  ...  An example of such a system that uses the cochlear in the inner ear as a battery source to supply a 2.4 GHz radio transmitter is described in [107] .  ... 
doi:10.1155/2014/981295 fatcat:okwgee7ym5gafkhyzqut7jo73y

A CMOS RF Receiver with Improved Resilience to OFDM-Induced Second-Order Intermodulation Distortion for MedRadio Biomedical Devices and Sensors

Yongho Lee, Shinil Chang, Jungah Kim, Hyunchol Shin
2021 Sensors  
complex bandpass filter, and fractional phase-locked loop synthesizer.  ...  The designed RF receiver is based on low-IF architecture, comprising a low-noise amplifier, single-to-differential transconductance stage, quadrature passive mixer, trans-impedance amplifier (TIA), image-rejecting  ...  A the fabricated chip is shown in Figure 7 , in which the major building blocks Note that the chip includes not only the RF receiver of Figure 3 but also an comprising a divide-by-4 circuit and a class-D  ... 
doi:10.3390/s21165303 pmid:34450744 pmcid:PMC8400011 fatcat:zyp5f2omabde3ilbddodmvm4u4

Addressing Security and Privacy Challenges in Internet of Things [article]

Arsalan Mosenia
2018 arXiv   pre-print
Internet of Things (IoT), also referred to as the Internet of Objects, is envisioned as a holistic and transformative approach for providing numerous services.  ...  The rapid development of various communication protocols and miniaturization of transceivers along with recent advances in sensing technologies offer the opportunity to transform isolated devices into  ...  A fast approach for detecting the frequency band of a wireless transmission is through an oscilloscope that uses a loop of wire as an antenna.  ... 
arXiv:1807.06724v1 fatcat:f45cytbjkjgyjiytvr2ygdcsze

Magnetless circulators based on linear time-varying circuits [article]

Ahmed Kord, 0000-0002-8876-3779, Austin, The University Of Texas At, Austin, The University Of Texas At, Andrea Alù
2019
full-duplex transceivers while, at the same time, permitting low-loss bi-directional communication using a single antenna.  ...  In a crowded electromagnetic spectrum with an ever‐increasing demand for higher data rates to enable multimedia‐rich applications and services, an efficient use of the available wireless resources becomes  ...  Therefore, an on-chip chiral inductor with a Q of 10~20 is still sufficient. is the period, and that the two single-ended circuits use inverted clocks.  ... 
doi:10.26153/tsw/2084 fatcat:k4p26apcmjf5zjj5m33scl27sm

Transceiver architectures and sub-mW fast frequency-hopping synthesizers for ultra-low power WSNs [article]

Lopelli, E (Emanuele), Roermund, AHM (Arthur) Van, Tang, JD (Johan) Van Der
2010
Transceiver architectures and sub-mW fast frequency-hopping synthesizers for ultra-low power WSNs. Eindhoven: Technische Universiteit Eindhoven. https://doi.org/10.6100/IR657018  ...  The injection locking is based on the principle that injecting a tone close in frequency to the free running frequency of the oscillator forces the oscillator to oscillate at the frequency of the injected  ...  The oscillator is an LC based oscillator using a differential coil to save space on chip 14 .  ... 
doi:10.6100/ir657018 fatcat:jgkmw2djxfevlpiv2x7at7fwim

High-efficiency linear RF power amplification:a class-E based EER study case [article]

Milosevic, D (Dusan), Roermund, AHM (Arthur) Van, Tang, JD (Johan) Van Der
2009
, e.g. by a Phase-Locked-Loop (PLL).  ...  signal to a specified output power level and to deliver it to the antenna, which then radiates the signal in the form of an electromagnetic wave.  ...  The design of Class-E PAs for use in the EER architecture has been discussed and inherent causes of intermodulation distortion of such an EER system have been identified.  ... 
doi:10.6100/ir656555 fatcat:ozsiuz2sefdezgsj2egsakj5te