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    • 4. 发明授权
    • Gas flow type angular velocity sensor
    • 气流式角速度传感器
    • US5553497A
    • 1996-09-10
    • US390875
    • 1995-02-17
    • Mizuho DoiTomoyuki NishioNobuhiro Fueki
    • Mizuho DoiTomoyuki NishioNobuhiro Fueki
    • B81B3/00G01C19/00G01P1/00G01P9/00
    • G01P9/00G01P1/006
    • A gas flow type angular velocity sensor which is capable of reliably sensing an angular velocity while accurately controlling the working gas flow with temperature compensation by using a pair of heat wires as a gas flow sensor without providing any additional gas flow sensor in the sensor body wherein an angular velocity sensing bridge circuit is provided at its current supply source with a temperature compensating circuit connected in series which temperature compensating circuit is composed of a pair of series or parallel connected resistance elements, one of which is a thermosensitive resistance element disposed in a gas path and the other of which is a reference resistance element disposed outside the gas path.
    • 一种气流式角速度传感器,其能够可靠地感测角速度,同时通过使用一对热线作为气体流量传感器,同时通过温度补偿准确地控制工作气体流量,而不在传感器体中提供任何额外的气体流量传感器, 在其电流源处提供角速度感测桥电路,其中温度补偿电路串联连接,温度补偿电路由一对串联或并联的电阻元件组成,其中之一是设置在气体中的热敏电阻元件 路径,另一个是设置在气体通道外部的参考电阻元件。
    • 6. 发明授权
    • Semiconductor sensor
    • 半导体传感器
    • US5279162A
    • 1994-01-18
    • US848693
    • 1992-03-09
    • Katsuhiko TakebeMizuho DoiHiroyasu TakeharaSatoshi HiyamaMasanobu Urabe
    • Katsuhiko TakebeMizuho DoiHiroyasu TakeharaSatoshi HiyamaMasanobu Urabe
    • G01P15/08G01P15/12G01L9/00H01L29/84
    • G01P15/123G01P15/0802G01P15/124G01P2015/0828H01L2224/48091H01L2924/12032H01L2924/13091Y10S73/04
    • This invention relates to a semiconductor sensor for detecting external physical forces, such as acceleration, contact pressures, air pressures, mechanical vibrations, etc. The semiconductor sensor according to this invention is characterized by the use of compound semiconductors of high piezoelectricity, such as GaAs, etc. Conventionally sensors of the cantilever type, diaphragm type, etc. are made of silicon. These prior art sensors have low detection sensitivity, and their characteristics tend to deteriorate. The sensor according to this invention is made of GaAs, which has high piezoelectricity and can retain good characteristics of the semiconductor even at high temperatures and includes a field-effect transistor formed on the GaAs for sensing a stress. The FET is driven by a constant current or a constant voltage so as to detect a change of an electrical characteristic (e.g., threshold characteristic) due to a stress. The structure of the sensor according to this invention enables the sizes of the sensors not only to be diminished but also to reduce the fabrication costs. When a stress is applied to the FET, the transconductance changes, and the temperature changes, consequently the I-V characteristic changes. An a.c. signal biased by a direct current is supplied to the gate of the FET, and a drain current is detected in an a.c. component and a d.c. component so as to detect a temperature concurrently with a detection of a stress.
    • 本发明涉及用于检测诸如加速度,接触压力,空气压力,机械振动等外部物理力的半导体传感器。根据本发明的半导体传感器的特征在于使用高压电性的化合物半导体,例如GaAs 等等。常规地,悬臂式,隔膜式等的传感器由硅制成。 这些现有技术的传感器具有低检测灵敏度,并且它们的特性趋于恶化。 根据本发明的传感器由GaAs制成,其具有高压电性,并且即使在高温下也能保持半导体的良好特性,并且包括形成在GaAs上用于感测应力的场效应晶体管。 FET由恒定电流或恒定电压驱动,以便检测由于应力引起的电特性(例如,阈值特性)的变化。 根据本发明的传感器的结构使得传感器的尺寸不仅可以减小,而且可以降低制造成本。 当FET施加应力时,跨导变化,温度变化,I-V特性变化。 一个 通过直流电流偏置的信号被提供给FET的栅极,并且以直流方式检测漏极电流。 组件和直径 以便与应力的检测同时检测温度。