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    • 1. 发明授权
    • Isolator circuit with improved frequency response
    • 隔离器电路具有改善的频率响应
    • US3974425A
    • 1976-08-10
    • US555193
    • 1975-03-03
    • Toshitsugu UedaShiro Takeuchi
    • Toshitsugu UedaShiro Takeuchi
    • H01F19/06G01R19/20G05F1/10H03F3/38H03F15/00
    • G01R19/20G05F1/10H03F15/00
    • An isolator circuit of the type designed to accept an input current and to generate a corresponding output current which is isolated from the input. The isolator circuit is formed with a core developing a flux in response to the input current and having a feedback winding for carrying the isolated output current. A magneto-sensitive element, such as a Hall effect element, responds to flux in the core, and an amplifier receives the output of the magneto-sensitive element and supplies a current to the feedback winding so as to cancel the flux produced in the core due to the input current. Improved frequency response is attained by means of a compensation winding disposed to respond to the difference between the flux produced by the input current and the flux produced by the output current. The compensation winding is connected in the isolator circuit with the voltage developed across the compensation winding being superposed on the output of the magneto-sensitive element and supplied to the input of the amplifier. The voltage developed across the compensation winding leads the voltage across the magneto-sensitive element and compensates for phase lags arising in the current, thereby extending accurate frequency response of the circuit.
    • 一种隔离器电路,其类型被设计为接受输入电流并产生与输入隔离的相应输出电流。 隔离器电路形成有芯,其响应于输入电流形成通量,并具有用于承载隔离输出电流的反馈绕组。 诸如霍尔效应元件的磁敏元件响应于磁芯中的磁通,并且放大器接收磁敏元件的输出并且向反馈绕组提供电流以便消除在磁芯中产生的磁通量 由于输入电流。 改进的频率响应通过设置为响应由输入电流产生的磁通与由输出电流产生的磁通之差的补偿绕组来实现。 补偿绕组连接在隔离器电路中,跨越补偿绕组的电压叠加在磁敏元件的输出上,并提供给放大器的输入端。 在补偿绕组上产生的电压导致磁敏元件上的电压,并补偿电流中产生的相位滞后,从而延长电路的精确频率响应。
    • 2. 发明授权
    • Quartz thermometer
    • 石英温度计
    • US4772130A
    • 1988-09-20
    • US869103
    • 1986-05-30
    • Toshitsugu UedaFusao KohsakaToshio Iino
    • Toshitsugu UedaFusao KohsakaToshio Iino
    • G01K7/32H03H3/02H03H9/19G01K11/26H04R17/00
    • G01K7/32Y10T29/42
    • A quartz thermometer adapted to measure the ambient temperature through detection of a change in the resonance frequency of a quartz resonator due to change in the temperature, wherein a quartz wafer of 0.02 to 0.2 mm thickness is cut from a region of a quartz within -30.degree. to -70.degree. in terms of rotation angle about the X axis of the quartz thereby to form a quart resonator within a range of between -15.degree. to +15.degree. in terms of angle of rotation about the Z' axis within the plane of the quartz wafer; and wherein thin metallic films are formed on the surfaces of the resonator to serve as exciting electrodes. The resonator and electrodes are produced by photolithography and anisotropic quartz etching processes. The resulting quartz thermometer has a large first order temperature coefficient of frequency.
    • 一种石英温度计,其适用于通过检测由于温度变化而导致的石英谐振器的谐振频率变化来测量环境温度,其中从石英的区域切割厚度为0.02至0.2mm的石英晶片,其范围在-30 以围绕石英X轴的旋转角度为-70°,从而在围绕Z'轴的旋转角度的-15°至+15°之间的范围内形成四分之一谐振器 石英晶片; 并且其中在谐振器的表面上形成薄金属膜以用作激励电极。 谐振器和电极通过光刻和各向异性石英蚀刻工艺制造。 所得的石英温度计具有大的一阶温度系数的频率。
    • 9. 发明授权
    • Absolute encoder for linear or angular position measurements
    • 用于线性或角位置测量的绝对编码器
    • US4786891A
    • 1988-11-22
    • US849574
    • 1986-04-08
    • Toshitsugu UedaFusao KohsakaToshio IinoHiroshi Nakayama
    • Toshitsugu UedaFusao KohsakaToshio IinoHiroshi Nakayama
    • H03M1/28H03M1/22
    • H03M1/287
    • An encoder device of the absolute position type for outputting a shift position or angle of rotation relative to the absolute position. The device comprises a code plate having first and second grid patterns wherein information is stored as 1 or 0 in a periodic manner at pitches slightly different from each other; first and second sensory arrays for detecting the first and second grid patterns; driving means for driving the sensors relative to the grid patterns and for obtaining an alternating signal from each array; and computation means for measuring the phase angle of the alternating signal from each array, and the phase angle difference therebetween and for calculating the position using such phase angles. Advantageously, the invention is suitable for miniaturization due to its simplicity, relaibility, and efficiency.
    • 绝对位置类型的编码器装置,用于相对于绝对位置输出换档位置或旋转角度。 该装置包括具有第一和第二格栅图案的代码板,其中信息以相对于彼此稍微不同的间距以周期性方式存储为1或0; 用于检测第一和第二网格图案的第一和第二感觉阵列; 用于驱动所述传感器相对于所述格栅图案并用于从每个阵列获得交替信号的驱动装置; 以及用于测量来自每个阵列的交变信号的相位角以及它们之间的相位角差并用于使用这种相位角来计算位置的计算装置。 有利地,本发明由于其简单性,可靠性和效率而适合于小型化。