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热词
    • 66. 发明授权
    • Tuned oscillator circuit for providing a rotating magnetic field
    • 用于提供旋转磁场的调谐振荡器电路
    • US3720883A
    • 1973-03-13
    • US3720883D
    • 1971-07-19
    • BELL TELEPHONE LABOR INC
    • HESS WVELLA COLEIRO G
    • C11D3/39G11C19/08H03B27/00H03B3/00
    • C11D3/3902G11C19/085H03B27/00
    • A tuned field drive circuit for use in magnetic domain apparatus is provided for generating a reversible, rotating, magnetic field in a plane. The circuit is capable of initiating, maintaining and terminating the rotating field with a predetermined phase and with a field strength envelope having a substantially constant amplitude. The basic circuit includes a high-speed transistor switch, a tuned L-C resonant circuit, and a feedback field current amplifier, for compensating for resistive loss in the resonant circuit. Two of the basic circuits are ''''slaved'''' together to form the resultant field drive circuit, each basic circuit providing one of two normal magnetic vector components comprising the rotating field.
    • 提供用于磁畴装置的调谐场驱动电路,用于在平面中产生可逆的旋转磁场。 该电路能够以预定相位和具有基本恒定振幅的场强包络起始,维持和终止旋转场。 基本电路包括高速晶体管开关,调谐L-C谐振电路和反馈场电流放大器,用于补偿谐振电路中的电阻损耗。 两个基本电路一起“从动”以形成合成场驱动电路,每个基本电路提供包括旋转场的两个正常磁矢量分量中的一个。