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33 results on '"Aydin I"'

1. X-Band CMOS Rectifier With 4% Efficiency at −35 dBm for Wireless Power Transmission

Author

Troy Buhr, Aydin I. Karsilayan, Jose Silva-Martinez, Christopher Rodenbeck, Brian Tierney, and Yanghyo Kim

Subjects
Power conversion efficiency, rectifier, wireless power transmission, X band, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

This paper proposes a radio frequency (RF) rectifier topology for low-power wireless power transmission (WPT) applications in the X band. The rectifier consists of a biased PMOS pair and is matched to the RF signal source impedance using a PCB transmission line (TL) matching network. It is demonstrated that a clever optimization of the bias voltage enables the rectifier to achieve greater sensitivity and efficiency than previous works at X band. The rectifier was designed in a 45 nm silicon-on-insulator (SOI) process and operates at a frequency of 9.64 GHz. It achieves a power conversion efficiency (PCE) of 4% and 46% at power levels of −35 dBm and −10 dBm, respectively.

Published
2023
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2. Thermoelectric Energy Harvesting for Implantable Medical Devices

Author

Thomas, Janes, Seth, Petrosky, Troy, Buhr, Aydin I, Karsilayan, Jose, Silva-Martinez, David, Genzer, Vighnesh, Das, and Larry, Stotts

Subjects
Electric Power Supplies, Energy Transfer, Equipment Design, Prostheses and Implants
Abstract

A thermoelectric energy harvesting system is proposed to supplement the primary power supply of an implantable medical device. A low-power synchronous boost converter capable of boosting 10mV input voltage to 1V output voltage is designed in a 180nm CMOS process. To increase the charging speed, a maximum power transfer scheme is utilized. The harvester delivers up to 10µW power with a minimum temperature gradient of 1-degree, which results in a power efficiency over 40%.Clinical Relevance- The use of this technology could enhance the longevity of battery-operated implanted medical devices by reducing the possibility of invasive battery replacement surgery.

Published
2021
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10. A 12-Bit 125-MS/s 2.5-Bit/Cycle SAR-Based Pipeline ADC Employing a Self-Biased Gain Boosting Amplifier.

Author

Park, Chulhyun, Chen, Tao, Noh, Kyoohyun, Zhou, Dadian, Prakash, Suraj, Alizadeh, Mohammadhossein Naderi, Karsilayan, Aydin I., Chen, Degang, Geiger, Randall L., and Silva-Martinez, Jose

Subjects
SUCCESSIVE approximation analog-to-digital converters, NYQUIST frequency, PIPELINES, POWER resources, ANALOG-to-digital converters, CALIBRATION
Abstract

This paper introduces a 12 bit 2.5 bit/cycle SAR-based pipeline ADC employing a self-bias gain boosting amplifier. The single-stage amplifier achieves a low-frequency gain of 37 dB, while consuming 1.3 mW of power consumption with 1.3 V of analog power supply. A 2.5 bit/cycle SAR ADC realizes as the sub-ADC in each stage, and reduces both power consumption and silicon area. A two-channel sampling architecture is employed to double the sampling rate and thereby maximize circuit efficiency. A digital calibration technique is used to reduce non-linearity and mismatches due to the RDAC, as well as gain error and offset of the open-loop residue amplifier. The prototype ADC was fabricated in TSMC 40-nm technology, and consumes 10.71 mW with 1.1 V / 1.3 V digital / analog power supplies. When operating at 125 MS/s, the ADC achieves an SFDR of 66.59 dB before calibration and 80.3 dB after calibration when measured at Nyquist frequency. The experimental results show a Walden FoM of 101 fJ/c.-s. before calibration and 47 fJ/c.-s. after calibration. [ABSTRACT FROM AUTHOR]

Published
2020
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11. 22nm FDSOI technology for emerging mobile, Internet-of-Things, and RF applications

Author

Carter, R., primary, Mazurier, J., additional, Pirro, L., additional, Sachse, J-U., additional, Baars, P., additional, Faul, J., additional, Grass, C., additional, Grasshoff, G., additional, Javorka, P., additional, Kammler, T., additional, Preusse, A., additional, Nielsen, S., additional, Heller, T., additional, Schmidt, J., additional, Niebojewski, H., additional, Chou, P-Y., additional, Smith, E., additional, Erben, E., additional, Metze, C., additional, Bao, C., additional, Andee, Y., additional, Aydin, I., additional, Morvan, S., additional, Bernard, J., additional, Bourjot, E., additional, Feudel, T., additional, Harame, D., additional, Nelluri, R., additional, Thees, H.-J., additional, M-Meskamp, L., additional, Kluth, J., additional, Mulfinger, R., additional, Rashed, M., additional, Taylor, R., additional, Weintraub, C., additional, Hoentschel, J., additional, Vinet, M., additional, Schaeffer, J., additional, and Rice, B., additional

Published
2016
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31. Sensitivity of Multiband ZP-OFDM Ultra-Wide-Band and Receivers to Synchronization Errors.

Author

Yi Zhou, Karsilayan, Aydin I., and Serpedin, Erchin

Subjects
*ERROR analysis in mathematics, *SYNCHRONIZATION, *TIME measurements, *SIMULATION methods & models, *DATA transmission systems, *STATISTICAL sampling
Abstract

This correspondence analyzes the sensitivity of multi-band zero-padding (ZP) orthogonal-frequency-division multiplexing (OFDM)-based ultra-wide-band receivers to carrier and sampling clock errors. Analytical expressions and numerical results for the power of intercarrier interference (ICI) and signal-to-interference-and-noise ratio (SINR) induced by imperfect carrier frequency and phase synchronization are presented and corroborated via computer simulations. It is found that the multiband zero-padding OFDM-based ultra-wide-band receivers are quite sensitive to carrier frequency errors but robust to sampling clock errors and small carrier phase offset errors. [ABSTRACT FROM AUTHOR]

Published
2007
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