Yazar "Yelkenci, Asli" seçeneğine göre listele

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    CMOS Optical Receiver for Low Power Biomedical Microsystems
    (IEEE, 2017) Yelkenci, Asli; Sarioglu, Baykal
    In this paper, an integrated CMOS optical receiver in which optical power delivery and optical communication realized on a single channel is proposed. Pulse Width Modulation (PWM) method is applied on the light source for transmission of the signals. Clock, data and power signals are obtained by various filtering methods. The proposed receiver is designed in 180 nm UMC Standard CMOS technology and can operate with single integrated CMOS photodiode.
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    Optical Communication System with Single Channel Power Delivery and Data Transmission for Digital Biomedical Applications
    (IEEE, 2016) Yelkenci, Asli; Sarioglu, Baykal
    In this paper, a communication system model in which optical power delivery and optical data transmission realized on a single channel is proposed. In the proposed system, optical power, data, and clock pulse signals are transmitted together on a single channel by applying PulseWidth Modulation on the light source. System model and the components are described in detail. The presented architecture enables single light sources and single fiber optical cable utilization, and hence, it can be integrated to compact, low-power, optical biomedical microsystems.
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    Ultra Low Power All-Digital CMOS Sensor Read Out Circuit for Optically Powered Biomedical Systems
    (IEEE, 2016) Yelkenci, Asli; Batur, Okan Zafer; Sarioglu, Baykal
    In this paper, an ultra low power all digital sensor read out circuit architecture which requires very low power is proposed. The proposed circuit is targeted for optically powered biomedical applications. The read-out circuit is utilized for the measurement of capacitive and resistive type of transducers. The measurement method is based on the fact that both capacitive and resistive sensors can be utilized to introduce delay in the signal transmission path. The proposed circuit architecture is composed of entirely digital components and it measures the introduced delay using only single input clock signal. The proposed architecture is implemented on UMC 180 nm CMOS technology and simulation results are presented. The proposed circuit operates with 1.2 V supply that is generated by the optical power harvesting and charge pump unit, while consuming 70.4 mu W. The results confirm that the proposed circuit can be utilized in optically powered biomedical applications for carrying out capacitive and resistive sensor measurements.