公开(公告)号：US06215436B1

公开(公告)日：2001-04-10

申请号：US09296985

申请日：1999-04-22

申请人： Daniele Ottini ,  Melchiorre Bruccoleri ,  Davide Demicheli ,  Paola Demartini

发明人： Daniele Ottini ,  Melchiorre Bruccoleri ,  Davide Demicheli ,  Paola Demartini

IPC分类号： H03M136

CPC分类号： H03M7/165 ,  H03M1/365

摘要： A differential decoder has a wide output dynamic range and reduced area consumption. The decoder includes a plurality of inputs which are correlated to a plurality of output lines. The output lines are driven by respective NPN type bipolar transistors which are connected to the output lines by their emitters while the input signals are fed to their bases. The decoder also includes a plurality of additional output lines which are complementary to the output lines and another plurality of NPN type bipolar transistors which are suitable to drive the additional output lines. The additional bipolar transistors are connected to the additional output lines through their emitter terminals, and are connected to the base and collector terminals of the bipolar transistors that drive the output lines, through their base and collector terminals.

摘要翻译： 差分解码器具有宽的输出动态范围和减少的面积消耗。 解码器包括与多条输出线相关联的多个输入。 输出线由相应的NPN型双极晶体管驱动，它们通过其发射极连接到输出线，同时将输入信号馈送到它们的基极。 解码器还包括与输出线互补的多个附加输出线和适于驱动附加输出线的另外多个NPN型双极晶体管。 附加的双极晶体管通过其发射极端子连接到附加输出线，并且通过其基极和集电极端子连接到驱动输出线的双极晶体管的基极和集电极端子。

公开(公告)号：US6002542A

公开(公告)日：1999-12-14

申请号：US904599

申请日：1997-08-01

申请人： Melchiorre Bruccoleri ,  Marco Demicheli ,  Davide Demicheli ,  Giuseppe Patti

发明人： Melchiorre Bruccoleri ,  Marco Demicheli ,  Davide Demicheli ,  Giuseppe Patti

IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B21/10

CPC分类号： G11B5/59688 ,  G11B5/59605 ,  G11B5/5534

摘要： A servo-demodulator for a pair of alternating signals generated by a magnetic disc read head and indicative of the position of the read head in relation to the center of a recorded track. The servo-demodulator comprises a peak detector for successively and individually sampling the amplitude of each of a plurality of peaks of the pair of alternating signals, and a capacitor periodically connected to the output of the peak detector by a control logic for deriving a weighted average of the various successively sampled amplitudes. In this manner, the control logic obtains an averaged measure of amplitude with high immunity to noise.

摘要翻译： 一种用于由磁盘读取头产生的一对交替信号的伺服解调器，并且指示读取头相对于记录轨道的中心的位置。 伺服解调器包括峰值检测器，用于连续和单独地采样该对交变信号的多个峰值中的每一个的振幅;以及电容器，通过用于导出加权平均值的控制逻辑周期性地连接到峰值检测器的输出端 的各种连续采样幅度。 以这种方式，控制逻辑获得具有高抗噪声能力的幅度的平均测量值。

公开(公告)号：US06369741B1

公开(公告)日：2002-04-09

申请号：US09611695

申请日：2000-07-07

申请人： Marco Demicheli ,  Giacomino Bollati ,  Davide Demicheli ,  Stefano Marchese

发明人： Marco Demicheli ,  Giacomino Bollati ,  Davide Demicheli ,  Stefano Marchese

IPC分类号： H03M112

CPC分类号： G11B20/10481 ,  G11B20/10009 ,  G11B20/10037

摘要： A method is provided for defining programmed values of the boost and cut-off frequency parameters of a low pass filter of pre-equalization, of a read channel for a magnetic medium mass memory device, to ensure optimal functioning conditions of the adaptive filter of final equalization. The method includes pre-programming instantaneous digital values of the boost and cut-off frequency parameters of the low pass filter of pre-equalization for each magnetic medium, as a function of purposely sensed instantaneous operating parameters of the adaptive filter that carries out the definitive equalization of the signal during a trim scanning of the magnetic medium.

摘要翻译： 提供了一种用于定义用于磁性介质大容量存储器件的读取通道的预均衡的低通滤波器的升压和截止频率参数的编程值的方法，以确保最终的自适应滤波器的最佳功能条件 均衡 该方法包括预编程用于每个磁介质的预均衡低通滤波器的升压和截止频率参数的瞬时数字值，作为实现确定性的自适应滤波器的有意识的瞬时操作参数的函数 在磁性介质的修剪扫描期间信号的均衡。