Browsing by Author "Huang, Shih-Chieh"

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A Fully-Integrated Wireless Bondwire Accelerometer With Closed-loop Readout Architecture
(2015-10-01)
Liao, Yu-Te
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Huang, Shih-Chieh
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Cheng, Fu-Yuan
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Tsai, Tsung-Heng
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電機資訊學士班
This paper presents a fully-integrated wireless bondwire accelerometer using a closed-loop readout interface that effectively reduces the noise from electrical circuits and long-term frequency drifts. The proposed accelerometer was fabricated using 0.18-mu m CMOS technology without micro electromechanical systems (MEMS) processing. To reduce manufacturing errors, the bondwire inertial sensors are wire-bonded on the chip pads, thereby enabling a precisely-defined length and space between sensing bondwires. The proposed wireless accelerometer using a pair of 15.2 mu m and 25.4 mu m bondwires achieves a linear transducer gain of 33 mV/g, bandwidth of 5 kHz, a noise floor of 700 mu g/root Hz, and 4.5 mu g bias stability. The acceleration data is digitalized by an energy-efficient 10-bit SAR ADC and then wirelessly transmitted in real time to the external reader by a low-power on-off shift keying (OOK) transmitter. The proposed architecture consumes 9 mW and the chip area is 2 mm x 2.4 mm.
A Low-Power Wireless Bondwire Inertial Sensor System
(2015)
Huang, Shih-Chieh
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Lu, Shao-Yung
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Cheng, Fu-Yuan
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Tsai, Tsung-Heng
;
Liao, Yu-Te
This paper presents the design and implementation of a fully-integrated CMOS accelerometer using bondwires as sensing devices without Micro Electro-Mechanical Systems (MEMS) processes. The model and analysis of bondwire inertial sensors are provided for further implementation of low-power and low-noise accelerometers. Finite element method (FEM) simulation is performed to verify the concept and model. This paper also proposes a closed-loop readout interface that suppresses the in-band noise and reduces both design complexity and power consumption. The bondwire accelerometer is fabricated in a 0.18 mu m CMOS process, achieves a 33 mV/g linear transducer gain within a 5 kHz bandwidth, and consumes 9 mW.
Electrically driven integrated photonic crystal nanocavity coupled surface emitting laser
(2007-04-09)
Huang, Shih-Chieh
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Yang, Tsung-Hua
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Lee, Chien-Ping
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Lin, Sheng-Di
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電子工程學系及電子研究所
Single mode surface emitting lasers with photonic crystal nanocavities integrated with electrically driven strained quantum well laser diodes are demonstrated. The photonic crystal serves as an end mirror for the laser cavity, while the nanocavities serve as wavelength selective high Q surface emitters. The laser emission from the nanocavities had excellent temperature stability. The wavelength shift versus temperature was about five times better than that of regular quantum well lasers. Dual wavelength emission from two side by side slightly different cavities was also demonstrated. Laser emission with two wavelengths of Delta lambda=0.8 nm was obtained. (c) 2007 American Institute of Physics.
Experimental Observation of Inflection-Point Slow Light Modes in Photonic Crystal Coupled Waveguides
(2007)
Huang, Shih-Chieh
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Kato, Masao
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Kuramochi, Eiichi
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Lee, Chien-Ping
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Notomi, Masaya
We report on the time-domain measurement of inflection-point slow light modes in a photonic crystal coupled waveguide. The S type band structure for the waveguide mode allows a unique opportunity for slow light measurement. (C) 2007 Optical Society of America
Single Mode Operation of Integrated Photonic Crystal Nanocavity Coupled Surface Emitting Lasers
(2007)
Huang, Shih-Chieh
;
Yang, Tsung-Hua
;
Lee, Chien-Ping
;
Lin, Sheng-Di
;
電子工程學系及電子研究所
We demonstrate integrated surface emitting lasers with coupled photonic crystal nanocavities. Single mode emission with high Q factors was obtained with electrical pumping. Dual wavelength emission from two side-by-side photonic crystal nanocavities was also demonstrated. (C) 2007 Optical Society of America
Time-domain and spectral-domain investigation of inflection-point slow-light modes in photonic crystal coupled waveguides
(2007-03-19)
Huang, Shih-Chieh
;
Kato, Masao
;
Kuramochi, Eiichi
;
Lee, Chien-Ping
;
Notomi, Masaya
We report on spectral-domain and time-domain measurements and numerical calculations of group velocities in a photonic crystal coupled waveguide, where the unique guided mode band structure has a flat band region within the photonic band gap allowing for slow light observation. The spectral dependence of group velocity, which is measured by interference method, indicates the existence of slow light modes around the inflection point of the unique flat band, rather than at the band edge. Time-domain observation of optical pulses propagating along two-dimension slab photonic crystal coupled waveguides is also demonstrated by using a high speed oscilloscope. By adjusting the wavelength of the input pulses toward the flat band of the coupled defect modes, an increasing duration time between reference and output pulses are clearly observed. An extremely small group velocity of 0.017c is thus obtained. Calculated group velocities show good agreement with our measured results. (c) 2007 Optical Society of America.