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    • 22. 发明授权
    • Magnetic sensor apparatus, current sensor apparatus and magnetic sensor element
    • 磁传感器装置,电流传感器装置和磁传感元件
    • US06323634B1
    • 2001-11-27
    • US09484793
    • 2000-01-18
    • Shiro NakagawaKatsuaki TanakaKatsumi YabusakiYoshihisa Okita
    • Shiro NakagawaKatsuaki TanakaKatsumi YabusakiYoshihisa Okita
    • G01R3300
    • G01R15/20G01R33/04
    • A magnetic sensor apparatus comprises a magnetic detector (101) that outputs a signal responsive to a magnetic field and a magnetic substance (110) having a cavity (111) in which the magnetic detector (101) is placed. The magnetic detector (101) is placed in the cavity (111) of the magnetic substance (110). The ratio between a magnetic field (H) to be measured and a magnetic field applied to the magnetic detector (101) is set to a specific value, based on at least one of a first demagnetizing factor depending on the shape of the magnetic substance (110) and a second demagnetizing factor depending on the shape of the cavity (111). The magnetic sensor apparatus further comprises a feedback coil (112) that applies a negative feedback magnetic field to the magnetic detector (101) and a reference magnetic field coil (113) that applies a reference alternating magnetic filed to the magnetic detector (101) for controlling the property of the magnetic detector (101).
    • 磁传感器装置包括输出响应于磁场的信号的磁检测器(101)和具有放置磁检测器(101)的空腔(111)的磁性体(110)。 磁检测器(101)放置在磁性物质(110)的空腔(111)中。 基于磁性物质的形状的第一退磁系数中的至少一个,将要测量的磁场(H)和施加到磁​​性检测器(101)的磁场之间的比率设定为特定值( 110)和取决于空腔(111)的形状的第二去磁因子。 磁传感器装置还包括向磁检测器(101)施加负反馈磁场的反馈线圈(112)和将参考交变磁场施加到磁检测器(101)的参考磁场线圈(113),用于 控制磁检测器(101)的性质。
    • 23. 发明授权
    • Analog to digital converter system
    • 模数转换器系统
    • US5305005A
    • 1994-04-19
    • US897152
    • 1992-06-11
    • Shiro NakagawaAtsuko TsuchidaEiji Takahashi
    • Shiro NakagawaAtsuko TsuchidaEiji Takahashi
    • H03M1/20
    • H03M1/201
    • An A/D converter system has an A/D converter element (10) which provides a first predetermined number of digital output bits for each input analog signal. An addition device (12,70) adds linear slope potential to the input analog signal. A calculator (14) provides an average of a plurality of digital output signals of the A/D converter element so that the average has larger number of bits than the first predetermined number. The addition device is implemented by a time constant circuit (70) which functions as an integral circuit for an input analog signal, and functions as a differential circuit for a slope potential.
    • A / D转换器系统具有A / D转换器元件(10),其为每个输入模拟信号提供第一预定数量的数字输出位。 加法装置(12,70)向输入的模拟信号增加线性斜率电位。 计算器(14)提供A / D转换器元件的多个数字输出信号的平均值,使得平均值具有比第一预定数量更大的比特数。 添加装置由用作输入模拟信号的积分电路的时间常数电路(70)实现,并且用作用于斜率电位的差分电路。
    • 25. 发明授权
    • Magnetic head
    • 磁头
    • US4222084A
    • 1980-09-09
    • US915162
    • 1978-06-14
    • Shiro NakagawaToshiki Aoi
    • Shiro NakagawaToshiki Aoi
    • G11B5/127G11B5/17G11B5/235G11B5/22G11B5/25
    • G11B5/1278
    • Disclosed is a magnetic head used for a vertical magnetizing system comprising a core having a pair of leg portions and an auxiliary magnetic pole which is arranged so as to face both leg portions. A closed magnetic path is formed by the core and the auxiliary magnetic pole. A sharp edge is formed at each end of the leg portions. A magnetic recording medium passes through the gap between the sharp edges and the auxiliary magnetic pole. When the magnetic recording medium passes through the gap, a high density magnetic recording operation is performed by the magnetic field produced by each sharp edge. Moreover, the recording operation can be effectively carried out due to the closed magnetic path and the recording magnetic field magnetized on the magnetic recording medium can be read out by using the same magnetic head as the magnetic head which is used for the recording operation. In an embodiment of a magnetic head of the invention, a magnetic thin film is coated on each surface of the side walls of the leg portions.
    • 公开了一种用于垂直磁化系统的磁头,其包括具有一对腿部的芯和辅助磁极,其布置为面对两个腿部。 由磁芯和辅助磁极形成闭合的磁路。 在腿部的每个端部形成尖锐边缘。 磁记录介质通过尖锐边缘和辅助磁极之间的间隙。 当磁记录介质通过间隙时,由每个尖锐边缘产生的磁场执行高密度磁记录操作。 此外,由于闭合的磁路可以有效地进行记录操作,并且可以通过使用与用于记录操作的磁头相同的磁头来读出在磁记录介质上磁化的记录磁场。 在本发明的磁头的一个实施例中,磁性薄膜涂覆在腿部的侧壁的每个表面上。