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公开(公告)号：US4332658A
公开(公告)日：1982-06-01
申请号：US184058
申请日：1980-08-28
申请人： Kosaku Tsuboshima
发明人： Kosaku Tsuboshima
IPC分类号： G01N27/00 , G01N27/414 , H01L29/78 , G01N27/26 , G01N27/30
CPC分类号： G01N27/4148
摘要： A chemical substance detection apparatus comprising a plurality of chemically sensitive elements constructed as an insulation gate field effect transistor formed on one or different substrates and including chemically sensitive portions selectively sensitive to different specified substances and one reference electrode, at least the chemically sensitive portions as well as the one reference electrode being brought into contact with the same test substance so as to detect various specified substances in the test substance, characterized by comprising reference resistors, first amplifiers operative to adjust gain thereof, a differential amplifier in common to all of said amplifiers and applying its output voltage to the reference electrode and a reference gate bias voltage source connected to the input terminals of the differential amplifier and supplying the reference gate bias voltage thereto.
摘要翻译： 一种化学物质检测装置，包括多个化学敏感元件，其构成为形成在一个或多个基板上的绝缘栅场效应晶体管，并且包括对不同的指定物质和一个参考电极选择敏感的化学敏感部分，至少化学敏感部分 由于一个参考电极与相同的测试物质接触，以便检测测试物质中的各种指定物质，其特征在于包括参考电阻器，用于调节增益的第一放大器，与所有所述放大器共同的差分放大器 并将其输出电压施加到参考电极，以及连接到差分放大器的输入端的参考栅极偏置电压源，并向其提供参考栅极偏置电压。
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公开(公告)号：US4305132A
公开(公告)日：1981-12-08
申请号：US97666
申请日：1979-11-27
申请人： Kosaku Tsuboshima , Noriaki Ono , Seiichi Hosoda
发明人： Kosaku Tsuboshima , Noriaki Ono , Seiichi Hosoda
CPC分类号： G01R19/0053 , G01R17/00 , H03H17/02
摘要： In measurement of signals containing noise at a known frequency, a method to eliminate noise at a known frequency of T so adapted as to obtain correct value of the signal free from noise by repeating measurements of signal levels at time interval of T/2 and averaging the values obtained by said measurements.
摘要翻译： 在测量包含已知频率的噪声的信号时，可以采用一种方法来消除在已知频率T处的噪声，以便通过以T / 2的时间间隔重复测量信号电平并获得平均值来获得没有噪声的信号的正确值 通过所述测量获得的值。
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