Kamyar Keikhosravy

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A high-efficiency CMOS rectifier with low start-up voltage for ultra-high-frequency (UHF) radio-frequency identification (RFID) applications is presented. To enhance the power conversion efficiency (PCE) of the conventional rectifier when the input voltage (power) is low, appropriate gate-drive voltages for each stage of the rectifier are generated using a(More)
A CMOS rectifier with a wide input signal range for radio-frequency identification (RFID) applications is presented. Using quasi-floating gate technique, a gate-biasing scheme is proposed to provide a relatively flat power conversion efficiency (PCE) curve for a wide input voltage (power) range. The proposed technique also enables an efficient operation for(More)
Efficiency enhancement techniques for CMOS rectifiers used in wireless power harvesting applications such as radio-frequency identification (RFID) or biomedical implants are overviewed. More specifically, three recently proposed efficiency enhancement techniques, namely, switched-capacitor gate-boosting scheme, auxiliary cell scheme and quasi-floatinggate(More)
In angioplasty with stent placement, re-narrowing of the artery within the stent site may occur due to the body's natural response to "heal" the stented area. This re-narrowing, also known as "in-stent restenosis", usually occurs within 6 months after surgery. To monitor and diagnose in-stent restenosis, passive telemonitoring using smart stents has been(More)
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