DC offset cancellation circuit, differential amplification circuit with DC offset cancellation circuit, photo-electric pulse conversion circuit, pulse shaping circuit, and pulse generation circuit
    22.
    发明授权
    DC offset cancellation circuit, differential amplification circuit with DC offset cancellation circuit, photo-electric pulse conversion circuit, pulse shaping circuit, and pulse generation circuit 失效
    DC偏移消除电路,具有DC偏移消除电路的差分放大电路,光电脉冲转换电路,脉冲整形电路和脉冲发生电路

    公开(公告)号:US07279951B2

    公开(公告)日:2007-10-09

    申请号:US10372967

    申请日:2003-07-14

    申请人: Akihiko Ono

    发明人: Akihiko Ono

    IPC分类号: H03L5/00

    摘要: A DC offset cancellation circuit that is capable of canceling a DC offset voltage occurring between a pair of differential output signals of a differential amplification circuit, while preventing a signal waveform from being distorted due to accumulation of AC components and a photo-electric pulse conversion circuit that is capable of generating an electrical pulse signal that accurately reproduces a rise timing and a fall timing of an optical pulse signal by canceling the DC offset voltage are provided. A photo-electric pulse conversion circuit is provided with a photodiode, an I-V conversion circuit, a first differential amplification circuit having a DC offset cancellation circuit, a second differential amplification circuit, a reference voltage generation circuit, and a comparison circuit. The DC offset cancellation circuit uses a changeover circuit to change a state of a low-pass filter with a hold function in synchronization with an inversion electrical pulse signal, and performs a negative feedback of a filtered signal which is generated by subjecting third differential signals to low-pass filtration or a hold filtered signal which is a filtered signal held during changeover.

    摘要翻译: 一种DC偏移消除电路,其能够抵消在差分放大电路的一对差分输出信号之间出现的DC偏移电压,同时防止信号波形由于AC分量的累积而失真,并且光电脉冲转换电路 提供能够产生通过消除DC偏移电压来精确地再现上升定时和光脉冲信号的下降定时的电脉冲信号。 光电脉冲转换电路设置有光电二极管,I-V转换电路,具有DC偏移消除电路的第一差分放大电路,第二差分放大电路,参考电压产生电路和比较电路。 DC偏移消除电路使用转换电路与反转电脉冲信号同步地改变具有保持功能的低通滤波器的状态,并且对经过第三差分信号产生的滤波信号进行负反馈 低通滤波或保持滤波信号,其是在切换期间保持的滤波信号。

    Current driver circuit with a damping circuit
    23.
    发明授权
    Current driver circuit with a damping circuit 有权
    电流驱动电路带阻尼电路

    公开(公告)号:US06347046B1

    公开(公告)日:2002-02-12

    申请号:US09621582

    申请日:2000-07-21

    IPC分类号: H02M112

    摘要: A current driver circuit for writing data to a hard disk receives an input signal and generates a current for driving a load. A drive circuit supplies the load with a current. A damping circuit connected to the drive circuit restricts the current supplied to the load in accordance with a pulse signal. A damping control signal connected to the damping circuit generates the pulse signal in response to the input signal and provides the pulse signal to the damping circuit.

    摘要翻译: 用于向硬盘写入数据的当前驱动电路接收输入信号并产生用于驱动负载的电流。 驱动电路为负载供电。 连接到驱动电路的阻尼电路根据脉冲信号限制提供给负载的电流。 连接到阻尼电路的阻尼控制信号响应于输入信号产生脉冲信号,并将脉冲信号提供给阻尼电路。

    Noise eliminating circuit
    24.
    发明授权
    Noise eliminating circuit 失效
    消噪电路

    公开(公告)号:US06255898B1

    公开(公告)日:2001-07-03

    申请号:US09598919

    申请日:2000-06-22

    IPC分类号: H03K500

    摘要: A noise eliminating circuit eliminates thermal asperity noise in a reproduction signal generated by a magnetic read head in a disk drive. The noise eliminating circuit includes a differential amplifier that receives the reproduction signal and a feedback signal and generates an amplified signal. A detection circuit connected to the differential amplifier detects noise in the amplified signal and generates a control signal. The control signal is activated when the noise is detected. A feedback circuit connected to the differential amplifier and the detection circuit cuts off the amplified signal with a first cutoff frequency when the control signal is not active and cuts off the amplified signal with a second cutoff frequency when the control signal is active.

    摘要翻译: 噪声消除电路消除由磁盘驱动器中的磁读头产生的再现信号中的热凹凸噪声。 噪声消除电路包括接收再现信号和反馈信号并产生放大信号的差分放大器。 连接到差分放大器的检测电路检测放大信号中的噪声并产生控制信号。 当检测到噪声时,控制信号被激活。 当控制信号无效时,连接到差分放大器和检测电路的反馈电路以第一截止频率切断放大信号,并且当控制信号有效时,以第二截止频率切断放大信号。

    Data transfer checking system
    25.
    发明授权
    Data transfer checking system 失效
    数据传输检查系统

    公开(公告)号:US5146458A

    公开(公告)日:1992-09-08

    申请号:US537329

    申请日:1990-06-13

    申请人: Akihiko Ono

    发明人: Akihiko Ono

    CPC分类号: G11C29/52 G06F11/2736

    摘要: A data transfer checking system includes a unit for writing a checking data pattern which is not identical with the data to be written in the same memory area; a unit for writing the data over the checking data pattern; and a unit for checking the memory area to see if there remains the checking data pattern, thereby providing high speed, low cost checking of the initial microprogram loading or data write conditions in an electronic computer system.

    摘要翻译: 数据传输检查系统包括用于写入与要写入同一存储区域的数据不相同的检查数据模式的单元; 用于通过检查数据模式写入数据的单元; 以及用于检查存储区域以查看是否仍然存在检查数据模式的单元,从而在电子计算机系统中提供对初始微程序加载或数据写入条件的高速,低成本检查。