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    • 6. 发明授权
    • Integration type input circuit and method of testing it
    • 集成型输入电路及其测试方法
    • US07246284B2
    • 2007-07-17
    • US10928179
    • 2004-08-30
    • Yasuhiko Takahashi
    • Yasuhiko Takahashi
    • G01R31/28
    • G01R31/31701
    • An input interface circuit is provided which includes an input transistor for receiving a digital input signal, a circuit for generating a reference value, and an integrating capacitor connected in series to a pair of current conducting electrodes of the input transistor for integrating the input signal. A logic level of the input signal is discriminated by comparing an integration of the input signal with the reference value. To provide a testing function, a test transistor is connected to a junction between the pair of current conducting electrodes of the input transistor and the integrating capacitor so that a current driving capability may be determined. Additionally, a discharge path circuit for controllably discharging the integrating capacitor is connected to the junction between the input transistor and the integrating capacitor.
    • 提供一种输入接口电路,其包括用于接收数字输入信号的输入晶体管,用于产生参考值的电路,以及串联连接到用于积分输入信号的输入晶体管的一对电流传导电极的积分电容器。 通过比较输入信号与基准值的积分来区分输入信号的逻辑电平。 为了提供测试功能,测试晶体管连接到输入晶体管的一对电流传导电极和积分电容器之间的结,使得可以确定电流驱动能力。 此外,用于可控放电积分电容器的放电路径电路连接到输入晶体管和积分电容器之间的结。
    • 8. 发明授权
    • Variable delay circuit
    • 可变延迟电路
    • US06448832B1
    • 2002-09-10
    • US10036463
    • 2002-01-07
    • Yasuhiko Takahashi
    • Yasuhiko Takahashi
    • H03H1120
    • H03L7/0805G06F1/10H03L7/0814H03L7/085
    • In an high-frequency LSI chip, a clock signal generating circuit which establish accurate synchronism between an input clock signal and an internal clock signal to prevent an input circuit to cause a synchronization shift. The clock signal generating circuit includes an input circuit for amplifying an input signal and outputting an amplified signal as a first internal signal; a variable delay circuit, on the basis of a control signal, for delaying the first internal signal and outputting a delayed signal as a second internal signal; a phase comparator for finding a phase difference between the input signal and second internal signal and outputting a phase difference signal indicative of the phase difference; and a control circuit for generating the control signal on the basis of the phase difference signal. Thereby the influences of a delay caused by the input circuit, which would not be able to be avoided in the prior art, can be avoided and thus the accurate internal clock signal can be generated.
    • 在高频LSI芯片中,时钟信号发生电路在输入时钟信号和内部时钟信号之间建立精确的同步,以防止输入电路引起同步偏移。 时钟信号发生电路包括用于放大输入信号并输出​​放大信号作为第一内部信号的输入电路; 基于控制信号的可变延迟电路,用于延迟所述第一内部信号并输出​​延迟的信号作为第二内部信号; 相位比较器,用于求出输入信号和第二内部信号之间的相位差,并输出指示相位差的相位差信号; 以及控制电路,用于根据相位差信号产生控制信号。 因此,可以避免在现有技术中不能避免的由输入电路引起的延迟的影响,从而可以产生精确的内部时钟信号。
    • 9. 发明授权
    • Method of detecting thermal asperity of magnetic storage device and circuit thereof
    • 检测磁存储器件的热不均匀性及其电路的方法
    • US06265869B1
    • 2001-07-24
    • US09206472
    • 1998-12-07
    • Yasuhiko Takahashi
    • Yasuhiko Takahashi
    • G01R3312
    • G11B20/24G11B5/012G11B5/035G11B5/09G11B19/04G11B2005/0016
    • Disclosed are a method of detecting a thermal asperity of a magnetic storage device which detects that a magnetic resistance element comes into contact with a magnetic storage medium, and a circuit thereof. This method comprises detecting an amplitude of an output of the magnetic resistance element, and creating a slice level that is m-times (m>1) as large as an output level. The slice level of an output relative value is created from the output of the magnetic resistance element, and hence the slice level having a magnitude corresponding to the output level of each magnetic resistance element can be automatically created. It is therefore feasible to accurately detect the thermal asperity of each magnetic resistance element.
    • 公开了一种检测磁性元件与磁性存储介质接触的磁存储装置的热凹凸的方法及其电路。 该方法包括检测磁阻元件的输出的幅度,并产生与输出电平一样大的m倍(m> 1)的限幅电平。 从磁阻元件的输出产生输出相对值的限制电平,因此可以自动产生具有对应于每个磁阻元件的输出电平的幅度的限幅电平。 因此,精确地检测每个磁阻元件的热不均匀性是可行的。