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1. 发明授权

US5805022A Circuit for automatically regulating the gain of a differential amplifier 失效
标题翻译：用于自动调节差分放大器增益的电路
公开(公告)号：US5805022A
公开(公告)日：1998-09-08
申请号：US713715
申请日：1996-09-13
申请人： Melchiorre Bruccoleri , David Demicheli , Marco Demicheli , Giuseppe Patti
发明人： Melchiorre Bruccoleri , David Demicheli , Marco Demicheli , Giuseppe Patti
IPC分类号： H03G3/30 , G11B5/02 , H03G1/00 , H03G3/20
CPC分类号： H03G3/3026 , G11B5/02 , H03G1/0088
摘要： A circuit having a double half-wave rectifier connected to the outputs of a differential amplifier in order to produce two quantities dependent on the amplitudes of the half-waves of the output signal of the amplifier. Two comparators each having an input are connected to an output of the rectifier and a reference input in order to produce respective output signals when the amplitudes of the respective half-waves are greater than the levels applied to the reference inputs. The circuit also has processing means for generating a signal for regulating the gain of the amplifier in dependence on the durations of the output signals of the two comparators. The circuit may advantageously be used when the signal to be amplified is not symmetrical.
摘要翻译：电路具有连接到差分放大器的输出的双半波整流器，以便产生取决于放大器的输出信号的半波幅度的两个量。每个具有输入的两个比较器连接到整流器的输出和参考输入，以便当相应的半波的幅度大于施加到参考输入的电平时产生相应的输出信号。电路还具有用于根据两个比较器的输出信号的持续时间产生用于调节放大器的增益的信号的处理装置。当待放大的信号不对称时，可以有利地使用该电路。

2. 发明授权

US5748128A Reduced current quadratic digital/analog converter with improved settling-time 失效
标题翻译：减少电流二次数字/模拟转换器，提高了建立时间
公开(公告)号：US5748128A
公开(公告)日：1998-05-05
申请号：US645457
申请日：1996-05-13
申请人： Melchiorre Bruccoleri , Marco Demicheli , Giuseppe Patti , Valerio Pisati
发明人： Melchiorre Bruccoleri , Marco Demicheli , Giuseppe Patti , Valerio Pisati
IPC分类号： H03M1/68 , G06J1/00 , H03M1/66 , H03M1/78 , H03M1/16
CPC分类号： H03M1/664 , G06J1/00 , H03M1/785
摘要： A digital/analog quadratic converter (DACQ) composed by a pair of linear converters connected in cascade has a direct coupling of the output node of the first converter (DAC1) with a node of a R-2R type resistive network of the second converter (DAC2) corresponding to the LSB stage of the R-2R type resistive network. High impedance nodes, notably the input node of the second linear converter, are advantageously eliminated from the "current path" thus markedly reducing the problems of relatively long settling times of high impedance nodes (having intrinsically large parasitic capacitances associated therewith). The peculiar architecture of the quadratic converter provides also for a remarkable simplification of the circuit.
摘要翻译：由串联连接的一对线性转换器组成的数字/模拟二次转换器（DACQ）具有第一转换器（DAC1）的输出节点与第二转换器的R-2R型电阻网络的节点的直接耦合 DAC2）对应于R-2R型电阻网络的LSB级。有利地，从“电流路径”消除高阻抗节点，特别是第二线性转换器的输入节点，从而显着地减少了高阻抗节点（具有与其相关的本质上大的寄生电容）的较长建立时间的问题。二次转换器的独特结构也为电路的显着简化提供了依据。

3. 发明授权

US5805015A Current generator stage used with integrated analog circuits 失效
标题翻译：电流发生器级与集成模拟电路一起使用
公开(公告)号：US5805015A
公开(公告)日：1998-09-08
申请号：US629320
申请日：1996-04-08
申请人： Melchiorre Bruccoleri , Gaetano Cosentino , Marco Demicheli , Giuseppe Patti
发明人： Melchiorre Bruccoleri , Gaetano Cosentino , Marco Demicheli , Giuseppe Patti
IPC分类号： G05F3/22 , G05F3/26 , H03F3/343 , H03K17/04 , H03K17/60 , G05F3/16
CPC分类号： G05F3/265 , G05F3/222
摘要： A current generator stage for integrated analog circuits includes a current source connected between a supply voltage and a ground terminal. A current mirror is operationally connected to the current source to generate an output current. A bias circuit is operationally connected to the current source to perform switching of the current source from a first operating mode to a second operating mode. The bias circuit includes an energy storage circuit which, in a first circuit configuration, supplies to the current source a first predetermined voltage when the current source is in the first operating mode. The energy storage circuit in a second circuit configuration is a combination of first and second reactances to supply to the current source a second predetermined voltage when the current source is in the second operating mode.
摘要翻译：用于集成模拟电路的电流发生器级包括连接在电源电压和接地端子之间的电流源。电流镜可操作地连接到电流源以产生输出电流。偏置电路可操作地连接到电流源，以将电流源从第一操作模式切换到第二操作模式。偏置电路包括能量存储电路，其在第一电路配置中，当电流源处于第一操作模式时，向电流源提供第一预定电压。第二电路配置中的能量存储电路是第一和第二电抗的组合，以在电流源处于第二操作模式时向电流源提供第二预定电压。

4. 发明授权

US06204990B1 Circuit and method for determining the position of a read head for a magnetic disk drive device 有权
标题翻译：用于确定用于磁盘驱动装置的读取头的位置的电路和方法
公开(公告)号：US06204990B1
公开(公告)日：2001-03-20
申请号：US09412080
申请日：1999-10-04
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： G11B5596
CPC分类号： G11B5/59688 , G11B5/5534 , G11B5/59605
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。

5. 发明授权

US5736880A Differential charge pump using surtchingly controlled current generators 失效
标题翻译：差动电荷泵采用交流电流发生器
公开(公告)号：US5736880A
公开(公告)日：1998-04-07
申请号：US576882
申请日：1995-12-21
申请人： Melchiorre Bruccoleri , Gaetano Cosentino , Marco Demicheli , Giuseppe Patti
发明人： Melchiorre Bruccoleri , Gaetano Cosentino , Marco Demicheli , Giuseppe Patti
IPC分类号： H03L7/093 , H03L7/089 , H03L7/06
CPC分类号： H03L7/0896
摘要： A differential charge pump circuit employing a lowpass filter network which is chargeable and dischargeable by switchingly controlled current generators. The differential charge pump employs two identical current generators for injecting the same current I in a substantially continuous manner, on the two significant nodes of the lowpass filter. The differential charge pump also employs two pairs of identical, switchingly controlled current generators connected to the two significant nodes, respectively, each capable of pulling a current I. The two generators forming each of the two pairs of switchingly controlled current generators are controlled by one of a pair of control signals (UP, DOWN) and by the inverted signal of the other of the pair of control signals, respectively. All four switchingly controlled generators may be of the same type (N-type), thus ensuring high speed and precision. The two identical (P-type) current generators employed for continuously injecting the same current I on the two nodes of the lowpass filter may be controlled through a common mode feedback loop for enhanced precision.
摘要翻译：采用低通滤波器网络的差分电荷泵电路，该低通滤波器网络可由切换控制的电流发生器进行充电和放电。差分电荷泵采用两个相同的电流发生器，以基本上连续的方式在低通滤波器的两个重要节点上注入相同的电流I。差分电荷泵还采用两对相同的交换控制电流发生器，分别连接到两个有效节点，每个有效节点能够拉电流I.形成两对开关控制电流发生器中的每一对的两个发电机由一个一对控制信号（UP，DOWN）和另一对控制信号的反相信号。所有四个交流控制发电机可以是相同类型（N型），从而确保高速度和精度。用于在低通滤波器的两个节点上连续注入相同电流I的两个相同（P型）电流发生器可以通过共模反馈回路来控制，以提高精度。

6. 发明授权

US6002542A Magnetic disc read head positioning device and method 失效
标题翻译：磁盘读头定位装置及方法
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。

7. 发明授权

US06556366B2 Bimodal biasing of magneto resistive heads 有权
标题翻译：磁阻头的双模偏置
公开(公告)号：US06556366B2
公开(公告)日：2003-04-29
申请号：US09944265
申请日：2001-08-30
申请人： Giuseppe Patti , Axel Alegre de La Soujeole
发明人： Giuseppe Patti , Axel Alegre de La Soujeole
IPC分类号： G11B503
CPC分类号： G11B5/012 , G11B5/02 , G11B5/09 , G11B5/40 , G11B5/455 , G11B19/02 , G11B2005/0018
摘要： A system and method for selecting between two biasing modes for biasing magneto resistive heads in a disk drive. A mode selector selects either a voltage biasing circuit or a current biasing to supply the bias voltage or bias current, respectively, to a magneto resistive head. The selection can be based on changes in parameters in the disk drive or magneto resistive heads during disk drive operation.
摘要翻译：用于在用于偏置磁盘驱动器中的磁阻头的两种偏压模式之间进行选择的系统和方法。模式选择器分别选择电压偏置电路或电流偏置以将偏置电压或偏置电流分别提供给磁阻头。该选择可以基于在磁盘驱动器操作期间磁盘驱动器或磁阻磁头中的参数的变化。

8. 发明授权

US4886981A Synchronizing circuit for a plurality of power units 失效
标题翻译：用于多个功率单元的同步电路
公开(公告)号：US4886981A
公开(公告)日：1989-12-12
申请号：US10137
申请日：1987-02-03
申请人： Salvatore Lentini , Giuseppe Patti
发明人： Salvatore Lentini , Giuseppe Patti
IPC分类号： H02J1/10 , H02J3/38 , H04J3/06
CPC分类号： H04J3/0688 , H02J1/102 , H02J3/38 , H02J2001/104 , Y10T307/735
摘要： A power system includes as many synchronizing units as the number of the power units. Each synchronizing unit has been designed to receive an activation signal at its input and to be connected to the other units through of a first and a second discs. Each synchronizing unit delivers to its output a synchronizing clock signal for the respective power units. The first synchronizing unit which receives the activation signal is qualified as the master unit. This master unit applies a predetermined polarity to the first bus and a clock signal to the second bus in order to synchronize the other units in response to the detection of the polarity on the first bus, the other units are characterized as slave unit.
摘要翻译： PCT No.PCT / EP76 / 00369 Sec。 371日期1987年2月3日 102（e）日期1987年2月3日PCT Filed 1986年6月20日PCT公布。公开号WO87 / 00701 日期1987年1月29日。电力系统包括与电力单元数量一样多的同步单元。每个同步单元被设计成在其输入处接收激活信号，并且通过第一和第二光盘连接到其它单元。每个同步单元向其输出端递送各个功率单元的同步时钟信号。接收激活信号的第一同步单元被认定为主单元。该主单元将第一总线的预定极性和第二总线的时钟信号施加到第二总线上，以便响应于第一总线上的极性检测而使其他单元同步，其他单元被表征为从单元。

9. 发明授权

US06512645B1 Circuit and method for writing to a memory disk with a boosted voltage 有权
标题翻译：用升压电压写入存储盘的电路和方法
公开(公告)号：US06512645B1
公开(公告)日：2003-01-28
申请号：US09393231
申请日：1999-09-09
申请人： Giuseppe Patti , Roberto Alini , Elango Pakriswamy
发明人： Giuseppe Patti , Roberto Alini , Elango Pakriswamy
IPC分类号： G11B509
CPC分类号： G11B5/022 , G11B5/012 , G11B5/02 , G11B5/09
摘要： A method and circuit are disclosed for controlling the write head of a magnetic disk storage device. The circuit includes a pull-up device coupled to a terminal of the write head, a current sink circuit which is coupled to the write head terminal and a bootstrap circuit coupled to the current sink circuit. When reversing the direction of current flow through the write head so that current is drawn from the write head from the write head terminal, the bootstrap circuit and the current sink circuit are activated. When the current in the write head nears and/or slightly surpasses the desired destination current level, the bootstrap circuit is deactivated and the pull-up device is thereafter immediately activated for a predetermined period of 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和电路。电路包括耦合到写头的端子的上拉装置，耦合到写入头端子的电流吸收电路和耦合到电流吸收电路的自举电路。当逆向通过写入头的电流的方向使得电流从写入头从写入头抽出时，自举电路和电流吸收电路被激活。当写头中的电流接近和/或稍微超过期望的目的地电流电平时，自举电路被去激活，然后上拉装置立即激活预定时间段。

10. 发明授权

US6043943A Asymmetry correction for a read head 失效
标题翻译：读头的不对称校正
公开(公告)号：US6043943A
公开(公告)日：2000-03-28
申请号：US846782
申请日：1997-04-30
申请人： Francesco Rezzi , Giuseppe Patti
发明人： Francesco Rezzi , Giuseppe Patti
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B5/02 , G11B5/39 , G11B20/10
CPC分类号： G11B5/012 , G11B20/10009 , G11B5/09 , G11B2005/0016
摘要： A method and a circuit for correcting asymmetry in a response signal generated by a magneto-resistive head. The magneto-resistive head generates a response signal to transmit digital information read from a magnetic media storage device. The asymmetry is corrected in a negative feedback manner by squaring an output signal, modulating the squared output signal, and subtracting the modulated squared output signal from the response signal to generate the output signal. The circuit employs a differential amplifier as an input stage and a Gilbert multiplier circuit to square the output signal.
摘要翻译：一种用于校正由磁阻头产生的响应信号中的不对称的方法和电路。磁阻头产生响应信号以传送从磁性介质存储装置读取的数字信息。通过平方输出信号，调制平方输出信号，以及从响应信号中减去经调制的平方输出信号以产生输出信号，以负反馈方式校正不对称性。该电路采用差分放大器作为输入级和吉尔伯特乘法器电路对输出信号进行平方。

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