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1. 发明申请

US20060034621A1 Transimpedance amplifier with integrated filtering and reduced parasitic capacitance 有权
标题翻译：具有集成滤波和减小寄生电容的互阻放大器
公开(公告)号：US20060034621A1
公开(公告)日：2006-02-16
申请号：US10917136
申请日：2004-08-12
申请人： Gilles Denoyer
发明人： Gilles Denoyer
IPC分类号： H04B10/06
CPC分类号： H03F1/08 , H03F1/26 , H03F1/30 , H03F3/087 , H03F3/45475 , H03F2200/372 , H03F2203/45521
摘要： A transimpedance amplifier (TIA) with integrated filtering. A capacitance is integrated into the TIA and connected to the power supply and to an internal ground of the TIA. Noise on the power supply of the transimpedance amplifier is filtered by the capacitor such that the power supply noise is reduced. The integrated capacitor also reduces noise ground. The integrated capacitor also reduces the effects of common mode noise that may be received from another circuit.
摘要翻译：具有集成滤波功能的跨阻放大器（TIA）。电容集成到TIA中，并连接到电源和TIA的内部地。跨阻放大器的电源上的噪声被电容器滤波，使得电源噪声减小。集成电容器还可减少噪声接地。集成电容器还减少了可能从另一电路接收的共模噪声的影响。

2. 发明授权

US06512649B1 Method for differentially writing to a memory disk 有权
标题翻译：用于差异写入存储盘的方法
公开(公告)号：US06512649B1
公开(公告)日：2003-01-28
申请号：US09651830
申请日：2000-08-30
申请人： Roberto Alini , Quocdzung T. Lam , Xiaokun Liu Chew , Mark McCornack , David Joseph Bezinque , Tehri Lee , Su Dang Le , Axel Alegre de La Soujeole , Gilles Denoyer
发明人： Roberto Alini , Quocdzung T. Lam , Xiaokun Liu Chew , Mark McCornack , David Joseph Bezinque , Tehri Lee , Su Dang Le , Axel Alegre de La Soujeole , Gilles Denoyer
IPC分类号： G11B502
CPC分类号： G11B5/022 , G11B5/012 , G11B5/02 , G11B5/09 , G11B5/40 , G11B2005/001 , G11B2005/0013
摘要： A method is disclosed for controlling the write head of a magnetic disk storage device. The method includes sinking current from the first terminal of the write head and sourcing current to the second terminal of the write head substantially simultaneously with sinking current from the first terminal so that a first steady state voltage level appears on the first terminal of the write head and a second steady state voltage level appears on the second terminal thereof that are approximately at a midpoint between a high reference voltage level and a low reference voltage level. The common mode voltage of the write head is substantially constant over time.
摘要翻译：公开了一种用于控制磁盘存储装置的写入头的方法。该方法包括从写入头的第一端子吸收电流并且将源电流基本上与来自第一端子的电流进行同时地馈送到写入头的第二端子，使得第一稳态电压电平出现在写入头的第一端上并且第二稳态电压电平出现在其第二端上，其大约在高参考电压电平和低参考电压电平之间的中点。写入头的共模电压随时间基本上是恒定的。

3. 发明授权

US06473251B2 Apparatus and method for reducing thermal interference in MR heads in disk drives 有权
标题翻译：用于减少磁盘驱动器中MR磁头的热干扰的装置和方法
公开(公告)号：US06473251B2
公开(公告)日：2002-10-29
申请号：US09398609
申请日：1999-09-17
申请人： Giuseppe Patti , Gilles Denoyer , Roberto Alini
发明人： Giuseppe Patti , Gilles Denoyer , Roberto Alini
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B2005/0016
摘要： An apparatus (and method) is provided that reduces thermal interference in the read signal of a disk drive. A variable or programmable resistance is used to change the transfer function of a filter in the read channel of the disk drive to filter the read signal. The filter has a first transfer function (first cut-off frequency) related to the programmed resistance during normal operation of the disk drive (i.e. when thermal interference is not detected). When thermal interference is detected in the read signal, the resistance is programmed to another value resulting in the filter having a second transfer function (second cut-off frequency). The resistance element includes a transconductance amplifier whose transconductance is variable or programmable to different values resulting in different programmable transfer functions (or one of a multitude of cut-off frequencies) for the filter. In the preferred embodiment, detection of thermal interference increases the cut-off frequency of the filter thereby filtering, or reducing the effects of, the thermal interference in the read signal.
摘要翻译：提供了减少磁盘驱动器的读取信号中的热干扰的装置（和方法）。使用可变或可编程电阻来改变磁盘驱动器的读通道中的滤波器的传递函数，以过滤读取信号。滤波器在磁盘驱动器的正常操作期间（即，当未检测到热干扰时）具有与编程电阻相关的第一传递函数（第一截止频率）。当在读取信号中检测到热干扰时，电阻被编程为另一个值，导致滤波器具有第二传递函数（第二截止频率）。电阻元件包括跨导放大器，其跨导是可变的或可编程为不同的值，导致滤波器的不同的可编程传递函数（或多个截止频率之一）。在优选实施例中，热干扰的检测增加了滤波器的截止频率，从而过滤或减少了读取信号中的热干扰的影响。

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