共查询到17条相似文献,搜索用时 78 毫秒
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本文提出了一种以聚酰亚胺为介质膜的电容式湿度传感器.它的工作原理是,在不同的湿度环境下,聚酰亚胺—水系统介电常数改变引起传感器电容的变化.该传感器具有工艺简单、体积小、灵敏度高、响应快等优点.该文介绍了它的结构、制造工艺和试验结果. 相似文献
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本文介绍一种数字化输出的集成流量传感器,传感器由温敏元件、加热元件和触发器组成,电路连接使得传感器工作在加热和冷却的振荡状态,产生方波输出,其脉冲宽度用作为流速的量度。该传感器由通用的CMOS工艺制成。 相似文献
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This paper briefly examines the pros and cons of CMOS pulse-frequency-modulation (PFM) digital pixel sensors. A pulse-frequency-modulation digital pixel sensor with in-pixel amplification is proposed to improve the resolution of the pixel sensor at low illumination. The proposed PFM digital pixel sensor offers the characteristics of a reduced integration time when the level of illumination is low with the fill factor comparable to that of PFM digital pixel sensors without in-pixel amplification. The proposed digital image sensor has been designed in TSMC- 1.8 V CMOS technology and validated using Spectre from Cadence Design Systems with BSIM3V3 device models. Simulation results demonstrate that the dynamic range of the proposed PFM digital pixel sensor with in-pixel amplification is 20 dB larger as compared with that of PFM digital pixel sensors without in-pixel amplification. The increased dynamic range is obtained in the low illumination condition where PFM digital pixel sensors without in-pixel amplification cease the operation due to the low photo current. 相似文献
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This paper describes the design and prototyping of an auto-balanced contactless current sensor in standard Complementary Metal–Oxide–Semiconductor (CMOS) technology, without any additional post-processing cost. The architecture includes two high-sensitivity Hall plates with differential amplification electronics. A high common mode rejection is insured by the integrated auto-balancing system based on the use of integrated coils. When a common current is applied in the embedded coils, the integrated system provides a feedback signal to a digital control unit which in turn adjusts the biasing current of one of the Hall plates in order to balance the amplification of the two Hall plates. Designed in a standard CMOS technology, this sensor can be integrated in power control System-On-Chip requiring extremely electro-magnetically compatible current sensor. 相似文献
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A CMOS compatible P+/Nwell/Psub double junction photodiode pixel was proposed, which can effi- ciently detect fluorescence from CsI(T1) scintillation in an X-ray sensor. Photoelectric and spectral responses of P+/Nwell, NweE1/Psub and P+/Nwell/Psub photodiodes were analyzed and modeled. Simulation results show P+/Nweu/Psub photodiode has larger photocurrent than P+/Nwetl photodiode and Nweu/Psub photodiode, and its spectral response is more in accordance with CsI(T1) fluorescence spectrum. Improved P+/Nweu/Psub photodiode detecting CsI(T1) fluorescence was designed in CSMC 0.5 #m CMOS process, CTIA (capacitive transimpedance amplifier) architecture was used to readout photocurrent signal. CMOS X-ray sensor IC prototype contains 8 × 8 pixel array and pixel pitch is 100 × 100 μm2. Testing results show the dark current of the improved P+/Nwell/Psub photodiode (6.5 pA) is less than that of P+/Nwell and P+/Nwell/Psub photodiodes (13 pA and 11 pA respectively). The sen- sitivity of P+/Nwell/Psub photodiode is about 20 pA/lux under white LED. The spectrum response of P+/Nwell/Psub photodiode ranges from 400 nm to 800 nm with a peak at 532 nm, which is in accordance with the fluorescence spectrum of Csl(T1) in an indirect X-ray sensor. Preliminary testing results show the sensitivity of X-ray sensor IC under Cu target X-ray is about 0.21 V.m^2/W or 5097e-/pixel @ 8.05 keV considering the pixel size, integration time and average energy of X-ray photons. 相似文献