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公开(公告)号：US5222918A
公开(公告)日：1993-06-29
申请号：US792386
申请日：1991-11-15
申请人： Yoji Abe , Tadashi Terada
发明人： Yoji Abe , Tadashi Terada
摘要： This invention is regarded to a pulley of a belt drive mechanism. The belt drive mechanism is applied to, for example, magnetic disk apparatuses. The contact surface of the pulley, in contact with a belt of the belt drive mechanism, has a shape of a part of a surface of a sphere.A center of a sphere is at a point substantially the same as a point of intersection of a plane including a center line of an operating course of the belt and a center line of rotation of the pulley.
摘要翻译： 本发明被认为是带驱动机构的滑轮。 皮带驱动机构适用于例如磁盘装置。 与皮带驱动机构的皮带接触的皮带轮的接触表面具有球体表面的一部分的形状。 球的中心与包括皮带的操作路线的中心线和皮带轮的中心线的平面的交叉点基本相同。
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公开(公告)号：US4908582A
公开(公告)日：1990-03-13
申请号：US330292
申请日：1989-03-29
申请人： Mitsumo Kawano , Tadashi Terada
发明人： Mitsumo Kawano , Tadashi Terada
CPC分类号： H03L7/0891 , H03L7/183
摘要： An AFC circuit using counters, flip-flops and logic gates produces a first pulse signal only when the phase of a VCO output signal lags the phase of a reference signal, and produces a second pulse signal only when the phase of the VCO output signal leads the phase of the reference signal. The first and second pulse signals control a switch to connect a first or a second constant current source to charge or discharge a filter circuit, to thereby produce a control voltage for the VCO. When the VCO output signal is in phase with the reference signal, the switch remains in a neutral position to hold a constant control voltage on the filter.
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公开(公告)号：US4818952A
公开(公告)日：1989-04-04
申请号：US151585
申请日：1988-02-02
申请人： Mitsumo Kawano , Tadashi Terada
发明人： Mitsumo Kawano , Tadashi Terada
CPC分类号： H03B5/20 , H03B2200/0058 , H03H11/0433
摘要： An oscillation circuit for an integrated circuit device. The oscillation circuit includes a band-pass filter for producing an output signal having a voltage and a defined resonance frequency and a voltage to current converter type limiter amplifier connected to the band-pass filter for supplying a current to the band-pass filter corresponding to the voltage of the output signal of the band-pass filter.
摘要翻译： 一种用于集成电路器件的振荡电路。 振荡电路包括带通滤波器，用于产生具有电压和定义的谐振频率的输出信号，以及连接到带通滤波器的电压 - 电流转换器型限幅放大器，用于将电流提供给对应于 带通滤波器的输出信号的电压。
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公开(公告)号：US5260634A
公开(公告)日：1993-11-09
申请号：US909617
申请日：1992-07-07
申请人： Hiroshi Tsuyuguchi , Tohro Miura , Naoki Sugeta , Tadashi Terada , Miya Enami
发明人： Hiroshi Tsuyuguchi , Tohro Miura , Naoki Sugeta , Tadashi Terada , Miya Enami
CPC分类号： H02P8/12 , Y10S388/915
摘要： In order to drive the stepper motor of a floppy disk drive with practically constant current in the face of fluctuations in supply voltage fed from a host system, a power control pulse generator circuit is provided which produces a series of power control pulses having a duty ratio dependent upon fluctuating supply voltage. The power control pulses are used for interrupting the excitation of the stepper motor windings during track seek operation. The power control pulses are generated by first repeatedly counting clock pulses from the host system to a predetermined number to provide periodically varying digital data, then translating the digital data into a triangular wave having an amplitude dependent upon the supply voltage, and then comparing the triangular wave with a reference voltage.
摘要翻译： 为了在面对从主机系统馈送的电源电压波动的情况下驱动具有几乎恒定电流的软盘驱动器的步进电机，提供了功率控制脉冲发生器电路，其产生一系列具有占空比的功率控制脉冲 取决于电源电压波动。 功率控制脉冲用于在跟踪寻道操作期间中断步进电机绕组的激励。 通过首先将从主机系统的时钟脉冲重复计数到预定数量来产生功率控制脉冲，以提供周期性变化的数字数据，然后将数字数据转换成具有取决于电源电压的幅度的三角波，然后比较三角形 波参考电压。
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公开(公告)号：US5191407A
公开(公告)日：1993-03-02
申请号：US641547
申请日：1991-01-15
申请人： Mitsumo Kawano , Tadashi Terada
发明人： Mitsumo Kawano , Tadashi Terada
摘要： A contour accentuation circuit for color signal comprises a variable gain amplifier, an output circuit and differential circuit. The output circuit outputs the signal according to the output signal from the variable gain amplifier and outputs the constant level signal to the output signal of amplitude level over predetermined level from the amplifier. The differential circuit differentiates the output signal from the output circuit and the amplifier amplifies and accentuates the contour of the input signal under the output control signal from the differential circuit.
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