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    • 52. 发明申请
    • MAGNETIC HEAD DEVICE AND RECORD/PLAYBACK DEVICE
    • 磁头装置和记录/回放装置
    • WO00051116A1
    • 2000-08-31
    • PCT/JP2000/000986
    • 2000-02-21
    • G11B5/48G11B5/54G11B5/55G11B5/596G11B11/105G11B21/22G11B21/21
    • G11B21/22G11B5/54G11B5/5552G11B5/5582G11B5/596G11B11/1055G11B11/10558G11B11/1058
    • A magnetic head body (12) is held on a free end of a cantilevered suspension (14). The head body (12) includes a first stop (5) parallel substantially to an information record medium (1), while the suspension (14) includes a second stop (6) parallel substantially to the information record medium (1) near the free end. The head body (12) is separate from the information record medium (1) when the magnetic head device is inactive. If an external impact is given in this state, the first stop (5) touches the second stop (6) so that the suspension (14) can be prevented from permanent deformation. Since the possible amount of displacement due to an impact with the head body (12) away from the information record medium (1) is thus limited, the distance between the head body (12) and the medium can be reduced, thereby reducing the thickness of a magneto-optical disk player.
    • 磁头体(12)保持在悬臂悬架(14)的自由端上。 头部主体(12)包括基本上与信息记录介质(1)平行的第一止动件(5),而悬架(14)包括一个基本上与信息记录介质(1)平行的第二止挡件 结束。 当磁头装置不活动时,头体(12)与信息记录介质(1)分离。 如果在该状态下发生外部冲击,则第一挡块(5)接触第二挡块(6),从而可以防止悬架(14)永久变形。 由于由于头体(12)远离信息记录介质(1)的冲击而产生的位移量可能受到限制,所以能够减小头体(12)与介质之间的距离,从而减小厚度 的磁光盘播放器。
    • 53. 发明申请
    • PHASE-LOCKED LOOP AND DEVICE FOR READING AND/OR WRITING INFORMATION FROM/ONTO A RECORD CARRIER
    • 相位锁定环和用于从/记录载体读取和/或写入信息的设备
    • WO00039930A1
    • 2000-07-06
    • PCT/EP1999/010062
    • 1999-12-14
    • G11B7/0045G11B7/005G11B11/105G11B20/14H03L7/14G11B7/004G11B20/10
    • H03L7/148G11B7/0045G11B7/005G11B11/10506G11B11/10515G11B11/10595G11B20/1403
    • A phase-locked loop comprising: a controllable oscillator (1) for supplying an output signal (So) having a frequency which is dependent on a control signal (Sc), feedback means (2) for supplying a feedback signal (Sh) having a frequency which is proportional to the frequency of the output signal (So), first error signal-generating means (3) for generating a first error signal (Se) which is a measure of an average difference in phase between the feedback signal (Se) and a reference signal (Sref), second error signal-generating means (4) for receiving the first error signal (Se) and generating a second error signal (Sa), comprising A/D conversion means (4a) for converting the first error signal (Se) into a digital signal (Sd), digital memory means (4b) for memorizing the digital signal (Sd), and D/A conversion means (4c) for converting the digital signal (Sd) into the second error signal (Sa). The phase-locked loop has a first operational state in which the digital signal (Sd) memorized in the digital memory means is dependent on the reference signal (Sref), and a second operational state in which the digital signal (Sd) is independent of the reference signal (Sref). In addition, the phase-locked loop comprises switching means (9) for selecting the control signal (Sc) from the first error signal (Se) and the second error signal (Sa). In the first operational state, the first error signal (Se) is the control signal (Sc), and in the second operational state, the second error signal (Sa) is the control signal (Sc).
    • 一种锁相环,包括:用于提供具有取决于控制信号(Sc)的频率的输出信号(So)的可控振荡器(1),用于提供反馈信号(Sh)的反馈装置(2) 频率与输出信号(So)的频率成比例的第一误差信号产生装置(3),用于产生第一误差信号(Se),其是反馈信号(Se)之间的平均相位差的量度, 以及用于接收第一误差信号(Se)并产生第二误差信号(Sa)的参考信号(Sref),第二误差信号产生装置(4),包括用于转换第一误差的A / D转换装置 信号(Se)转换成数字信号(Sd),用于存储数字信号(Sd)的数字存储装置(4b)和用于将数字信号(Sd)转换成第二误差信号(D)的D / A转换装置 SA)。 锁相环具有第一操作状态,其中存储在数字存储器装置中的数字信号(Sd)取决于参考信号(Sref)和第二操作状态,其中数字信号(Sd)独立于 参考信号(Sref)。 此外,锁相环包括用于从第一误差信号(Se)和第二误差信号(Sa)选择控制信号(Sc)的切换装置(9)。 在第一操作状态下,第一误差信号(Se)是控制信号(Sc),在第二操作状态下,第二误差信号(Sa)是控制信号(Sc)。
    • 54. 发明申请
    • OPTICAL RECORDING/REPRODUCING DEVICE HAVING A SYSTEM FOR THE REDUCTION OF LASER NOISE WHEN READING DATA FROM THE RECORD CARRIER
    • 具有用于在从记录载体读取数据时减少激光噪声的系统的光学记录/再现装置
    • WO00039793A1
    • 2000-07-06
    • PCT/EP1999/010067
    • 1999-12-14
    • G11B7/005G11B7/125G11B11/105G11B19/04H01S3/13
    • G11B7/126G11B11/10515G11B11/10595G11B19/04H01S3/13
    • The device described has a first operational state for writing information onto a record carrier (1) and a second operational state for reading information from a record carrier (1). The device comprises a phase-locked loop (3-6) for generating a clock signal (CL) from a reference signal (SCL). The device further comprises a control unit (7) for generating a pulsed transducer control signal (Str) in response to an information signal (Sinfo) and the clock signal (CL). The device also comprises a transducer (10) for generating physically detectable patterns in the record carrier (1) in response to the transducer control signal (Str). The device also comprises a transducer (10) for generating a read signal (Sls) in response to physically detectable patterns in the record carrier (1) in the second operational state. The transducer (10) for generating the read signal (Sls) comprises a radiation source (11). The device further comprises a power supply (7) which supplies the radiation source (11) with an electric power. The phase-locked loop (3-6) comprises memory means (12) for memorizing, in the first operational state, a memory value which is a measure of the supplied clock signal (CL). In the second operational state, the phase-locked loop (3-6) generates the clock signal (CL) in response to the memorized memory value and causes a high-frequency modulation in the electric power supplied by the power supply (7).
    • 所描述的装置具有用于将信息写入记录载体(1)的第一操作状态和用于从记录载体(1)读取信息的第二操作状态。 该装置包括用于从参考信号(SCL)产生时钟信号(CL)的锁相环(3-6)。 该装置还包括响应于信息信号(Sinfo)和时钟信号(CL)产生脉冲换能器控制信号(Str)的控制单元(7)。 该装置还包括用于响应于换能器控制信号(Str)在记录载体(1)中产生物理可检测图案的换能器(10)。 该装置还包括用于在第二操作状态下响应于记录载体(1)中的物理可检测图案生成读取信号(Sls)的换能器(10)。 用于产生读取信号(Sls)的换能器(10)包括辐射源(11)。 该装置还包括向辐射源(11)供电的电源(7)。 锁相环(3-6)包括存储装置(12),用于在第一操作状态下存储作为所提供的时钟信号(CL)的量度的存储器值。 在第二操作状态下,锁相环(3-6)响应于存储的存储器值产生时钟信号(CL),并且对由电源(7)提供的电力进行高频调制。
    • 58. 发明申请
    • DETECTION OF PULSE PEAK INSTANCE AND AMPLITUDE IN A STORAGE DRIVE
    • 在存储驱动器中检测脉冲峰值和振幅
    • WO00010167A1
    • 2000-02-24
    • PCT/US1999/014506
    • 1999-06-25
    • G11B7/005G11B7/007G11B7/09G11B11/10G11B11/105G11B20/10G11B21/08G11B7/00G11B21/00
    • G11B20/10037G11B7/005G11B7/00745G11B7/09G11B11/10541G11B11/10565G11B20/10009G11B21/081
    • A method of pre-processing sampled data prior to estimating the peak amplitude of a pulse includes averaging of two adjacent sample values. Pre-processing makes the peak amplitude estimation less sensitive to the sampling phase relative to the peak position and consequently allows for the use of a lower sampling period relative to the full-width-half-maximum pulse width for a given peak estimation accuracy. The method incorporates a step in which a base line offset signal is subtracted from an estimated peak value, and multiplying the consequent pulse peak amplitude estimate by a predetermined constant in order to compensate for a systematic change in a final peak amplitude estimate. The multiplying constant may have a value derived from estimated peak values of other detected pulses in order to compensate for a systematic change in the peak amplitude estimate. Offsets in a position error signal derived from such pulses are eliminated by subtracting the estimated peak amplitudes of a pair of proximate (spatially and temporally related) pulses. The difference of another pair of proximate pulses is used to estimate the maximum peak amplitude of each pulse. A position error signal difference is divided by a maximum peak amplitude difference to generate a normalized position error signal that compensates for systematic changes of pulse signal amplitude estimate caused by adjacent sample averaging.
    • 在估计脉冲的峰值幅度之前预处理采样数据的方法包括平均两个相邻采样值。 预处理使得峰值幅度估计对于相对于峰值位置的采样相位不太敏感,因此允许对于给定的峰值估计精度使用相对于全宽半最大脉冲宽度的较低采样周期。 该方法包括一个步骤,其中从估计的峰值中减去基线偏移信号,并将随后的脉冲峰值振幅估计乘以预定常数,以便补偿最终峰值幅度估计的系统变化。 乘法常数可以具有从其他检测到的脉冲的估计峰值导出的值,以便补偿峰值幅度估计的系统变化。 通过减去一对近似(空间和时间相关的)脉冲的估计峰值幅度来消除从这样的脉冲导出的位置误差信号中的偏移。 使用另一对邻近脉冲对的差别来估计每个脉冲的最大峰值幅度。 将位置误差信号差除以最大峰值振幅差以产生归一化位置误差信号,该归一化位置误差信号补偿由相邻采样平均引起的脉冲信号幅度估计的系统变化。