Zhenyong Zhang

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PURPOSE To conduct in vivo measurements of the bulbar conjunctiva epithelial, stromal, and total thicknesses in healthy Chinese subjects using optical coherence tomography (OCT) and to compare the conjunctival thickness differences between sex and age. METHODS From January to July 2012, healthy Chinese subjects were recruited to undergo a Cirrus HD-OCT(More)
A novel second order sigma delta modulator (SDM) with 5-bit quantizer has been proposed with simplified DAC arrays, high-order truncation noise shaping for increased tolerance to analog imperfections, and extended dynamic range for a maximum input signal swing of up to -0.45 dBFS. With truncation filter and pseudo SDM in the DSP, the truncation and(More)
The power efficiency of pipelined and cyclic ADCs can be improved significantly by judicious choice of the interstage gain. Previous investigations by the authors have shown the possibility of using a novel technique known as the generalized radix design approach to attain the goal of optimal power-speed tradeoffs in this class of ADCs. In order to test the(More)
approved: Gábor C. Temes Delta-Sigma () analog-to-digital converters (ADCs) are widely used in wireless transceivers. Recently, continuous-time (CT) ADCs gain growing interest in wireless applications for their lower power consumption and wider input bandwidth as compared with the discrete-time (DT) counterparts. In this thesis, a wideband low-power CT(More)
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