Browsing by Author "Cheng, Shih-Tung"

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-65dB HD3 CMOS TUNABLE OTA WITH MOBILITY REDUCTION COMPENSATION
(2011)
Cheng, Shih-Tung
;
Chang, Wei-Hsiu
;
Hung, Chung-Chih
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電機工程學系
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Department of Electrical and Computer Engineering
This paper presents a high linearity operational transconductance amplifier (OTA) base on the technique of mobility reduction compensation, which achieves great linearity improvement and has wide input range at low power consumption. The third-order harmonic distortion (HD3) of the OTA is about -65dB at 1MHz for a 1.2-V-pp differential input. The OTA was designed by the TSMC 0.18-mu m CMOS process technology. For 1.8-V supply voltage, the static power consumption is only 0.427mW.
Design and Fabrication of a Small-Form-Factor Optical Pickup Head
(2009-05-01)
Chiu, Yi
;
Shih, Hsi-Fu
;
Chiou, Jin-Chern
;
Cheng, Shih-Tung
;
Hung, Kuo-Yung
This paper presents the design and fabrication of a small-form-factor optical pickup head (OPH) for both red and blue wavelength. A holographic optical element (HOE) is used for beam splitting, aberration correction, and servo-signal generation to reduce the number of components and simplify the assembly procedure. In addition to demonstrating this OPH by using existing discrete components, several key components and processes are developed to use micro-electro-mechanical system (MEMS) technology to facilitate batch fabrication and wafer level assembly of the micro OPU.