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Your search keyword '"Ying-Qian Ma"' showing total 7 results
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7 results on '"Ying-Qian Ma"'

5. Vibration Test and Analysis for Indoor Steel Stair in Public Region

Author

Xiao Song Ren, Ying Qian Ma, and Chang Qing Gong

Subjects
Vibration, Engineering, Stairs, business.industry, Numerical analysis, General Engineering, Vibration Problem, medicine, Stiffness, Structural engineering, medicine.symptom, business, Test (assessment)
Abstract

ndoor steel stairs, which are usually designed by professional construction companies, are controlled by the stiffness and strength. However the vibration problem is not considered and may lead to the problem of comfortability and even safety. This paper focuses on vibration of steel stairs by a case study. Both the vertical and the lateral vibration are concerned in the study by site test and numerical analysis. Based on the test and analytical results, the vibration evaluation is done for it. Finally some suggestions for indoor steel stair are given to reduce the problem of vibration.

Published
2013

6. A 1.3 ppm/°C BiCMOS bandgap voltage reference using piecewise-exponential compensation technique.

Author

Xin Ming, Ying-qian Ma, Ze-kun Zhou, Bo Zhang, and Yang Lu

Subjects
ELECTRIC potential, CURVATURE, EMITTER-coupled logic circuits, DATA conversion, IDDQ testing, ELECTRIC resistors, MAXWELL-Boltzmann distribution law, TEMPERATURE, CURRENT noise (Electricity)
Abstract

high-order curvature-compensated BiCMOS bandgap voltage reference using piecewise-exponential compensation technique is presented in this paper. The circuit utilizes a variable gain current mirror to realize exponential compensation as well as a common emitter amplifier with local feedback to achieve a second correction. Implemented in 0.5-μm BCD process, the proposed voltage reference consumes a supply current of 17.5 μA at 2.5 V. A temperature coefficient(TC) of 1.3 ppm/°C, PSRR of more than 76 dB at low frequencies and a line regulation of 160 ppm/V from 2.5 to 5 V are easily achieved, which make it applied widely in portable equipments. [ABSTRACT FROM AUTHOR]

Published
2011
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7. A 1.6-V 25-\muA 5-ppm/^\circC Curvature-Compensated Bandgap Reference.

Author

Ze-Kun Zhou, Yue Shi, Zhi Huang, Pei-Sheng Zhu, Ying-Qian Ma, Yong-Chun Wang, Zao Chen, Xin Ming, and Bo Zhang

Subjects
BAND gaps, ELECTRONIC band structure, ENERGY-band theory of solids, PHOTOCONDUCTIVITY, ELECTRIC potential
Abstract

A high precision high-order curvature-compensated bandgap reference (BGR) compatible with standard BiCMOS process is presented in this paper that is capable of working down to input voltages of 1.6 V with 1.285 V output voltage. High-order curvature correction for this reference is accomplished by a novel piecewise technique, which realizes exponential curvature compensation in temperature range, and a logarithmic compensation term proportional to VT In T in higher temperature range through simple structures. Experimental results of the proposed BGR implemented in 0.5-μm BiCMOS process demonstrate that a temperature coefficient (TC) of 5 ppm/°C is realized at 3.6 V power supply, a power-supply noise attenuation (PSNA) of 70 dB is achieved without filtering capacitors, and the line regulation is better than 0.47 mV/V from 1.6 V to 5 V supply voltage while dissipating a maximum supply current of 25 μA. The active area of the presented BGR is 180 μm × 220 μm. [ABSTRACT FROM PUBLISHER]

Published
2012
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