Browsing by Author "Wu, ZW"

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Low-power low-voltage reference using peaking current mirror circuit
(2005-05-12)
Cheng, MH
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Wu, ZW
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電控工程研究所
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Institute of Electrical and Control Engineering
A low-power low-voltage bandgap reference using the peaking current mirror circuit with MOSFETs operated in the subthreshold region is presented. A demonstrative chip was fabricated in 0.35 mu m CMOS technology, achieving the minimum supply voltage 1.4 V, the reference voltage around 580 mV, the temperature coefficient 62 ppm/degrees C, the supplied current 2.3 mu A, and the power supply noise rejection ratio of -84 dB at 1 kHz.
Synthesis and properties of covalently bonded layered silicates/polyimide (BTDA-ODA) nanocomposites
(2002-07-01)
Leu, CM
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Wu, ZW
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Wei, KH
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材料科學與工程學系
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Department of Materials Science and Engineering
Covalently bonded layered silicates/polyimide (BTDA-ODA) nanocomposites have been synthesized from gamma-(aminopropyl)triethoxysilane (APTS) grafted kenyaite and poly(amic acid). The existence of covalent bonds between APTS and silicates and between APTS and the dianhydride end groups of the polymer have been confirmed by solid-state C-13 and Si-29 nuclear magnetic resonance and infrared spectroscopy, respectively. The thermal, mechanical, and moistureabsorption retardation properties of these nanocomposites were found to improve substantially over those of neat BTDA-ODA. In particular, a maximum increase of 36 degreesC in the degradation temperature and a maximum reduction of 54% in moisture absorption are displayed by these nanocomposites.