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1.发明授权Method and circuit for enabling rapid flux reversal in the coil of a write head associated with a computer disk drive, or the like 失效用于实现与计算机磁盘驱动器相关联的写入头的线圈中的快速磁通反转的方法和电路等
公开(公告)号：US6166869A
公开(公告)日：2000-12-26
申请号：US928999
申请日：1997-09-12
CPC分类号： H03K17/04106 , G11B5/022 , H03K17/6872 , H03K2217/0045
摘要： An H-bridge for applying a current to a coil of a write head assembly for writing data to a magnetic media includes two pair of two switchable transistors. Each pair of transistors is connected between a supply voltage and a reference potential and is adapted to be connected to the coil between the transistors of each pair for turning the transistors turned on and off in a sequence to control the direction of current flow in the coil. The upper transistors of each pair serves a switching transistor, and the lower transistors provide a mirrored referenced current to the coil. A pair of capacitors are connected to a control element of a respective associated one of the lower transistors, and switching circuitry is connected to the capacitors to selectively connect each of the capacitors to inject current into the control element of the respective associated lower transistor when the respective associated lower transistor is turned on. Also disclosed is a technique for adjusting the amount of boost current injected into the lower transistors.
摘要翻译： 用于将电流施加到用于将数据写入磁介质的写头组件的线圈的H桥包括两对可切换晶体管。 每对晶体管连接在电源电压和参考电位之间，并且适于连接到每对晶体管之间的线圈，以顺序地导通和关断晶体管，以控制线圈中的电流方向 。 每对的上部晶体管用于开关晶体管，而下部晶体管提供了到线圈的镜像参考电流。 一对电容器连接到相应相关联的一个下部晶体管的控制元件，并且开关电路连接到电容器以选择性地连接每个电容器以将电流注入到相应的相关联的下部晶体管的控制元件中，当 相应的相关联的较低晶体管导通。 还公开了一种用于调节注入到下部晶体管的升压电流的量的技术。
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2.发明授权Method and circuit for enabling rapid flux reversal in the coil of a write head associated with a computer disk drive, or the like 失效用于实现与计算机磁盘驱动器相关联的写入头的线圈中的快速磁通反转的方法和电路等
公开(公告)号：US6052017A
公开(公告)日：2000-04-18
申请号：US928447
申请日：1997-09-12
CPC分类号： H03K17/04106 , G11B5/022 , H03K17/6872 , H03K2217/0045
摘要： A method and apparatus, for applying a current to a coil of a write head assembly of a disk drive, or the like, to cause the flux within the coil to rapidly reverse, has an H-bridge having two pair of two switchable transistors. Each pair of the transistors is connected between a supply voltage and a reference potential, and is adapted to be connected to the coil between the two transistors of each pair. The two transistors of the first pair may be connected to receive a control signal to turn on complementary transistors of the first and second pair of transistors to selectively control current flow in the coil in first or second directions. A reference current source supplies a reference current, and one of the transistors in each of the first and second pairs of transistors is connected when turned on to mirror the reference current to control the currents in the coil. First and second parallel transistors are connected in parallel respectively with the mirror transistors, the first and second parallel transistors being connected to be turned on respectively by the control signal and the inverted control signal concurrently with the respective mirror transistor. A pair of timing elements turn off respective ones of the parallel transistors after a predetermined time so that when the parallel transistors are turned on, the current in the coil overshoots a value established by the mirror transistors.
摘要翻译： 一种用于将电流施加到盘驱动器等的写入头组件的线圈上以使线圈内的磁通快速反转的方法和装置具有具有两对两个可切换晶体管的H桥。 每对晶体管连接在电源电压和参考电位之间，并且适于连接到每对两个晶体管之间的线圈。 第一对的两个晶体管可以被连接以接收控制信号以导通第一和第二对晶体管的互补晶体管，以选择性地控制在第一或第二方向上的线圈中的电流。 参考电流源提供参考电流，并且当导通时连接第一和第二对晶体管中的每个晶体管中的一个晶体管以反映参考电流以控制线圈中的电流。 第一和第二并联晶体管分别与镜晶体管并联连接，第一和第二并联晶体管分别通过控制信号和反相控制信号分别连接到相应的镜像晶体管。 一对定时元件在预定时间之后关闭并联晶体管的各个，使得当并联晶体管导通时，线圈中的电流超过由镜晶体管建立的值。
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公开(公告)号：US06297919B1
公开(公告)日：2001-10-02
申请号：US08957424
申请日：1997-10-24
IPC分类号： G11B509
CPC分类号： G11B5/02 , G11B5/012 , G11B5/09 , G11B2005/0013
摘要： A write head is described having a switchable damping resistance coupled in parallel with an inductor. The damping resistance is decoupled from the inductor by rendering a transistor nonconductive when a direction of current in the inductor changes. The damping resistance is then coupled to the inductor before oscillations begin in the current in the inductor. The decoupling of the damping resistor eliminates power dissipation in the damping resistor during a change in the direction of current in the inductor.
摘要翻译： 描述了具有与电感器并联耦合的可切换阻尼电阻的写头。 当电感器中的电流方向改变时，阻尼电阻通过使晶体管不导通而与电感器去耦。 然后在电感器中的电流开始振荡之前，将阻尼电阻耦合到电感器。 阻尼电阻器的去耦可以消除电感器电流方向变化时阻尼电阻器的功耗。
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公开(公告)号：US06487030B2
公开(公告)日：2002-11-26
申请号：US09932658
申请日：2001-08-17
IPC分类号： G11B509
CPC分类号： G11B5/02 , G11B5/012 , G11B5/09 , G11B2005/0013
摘要： A write head is described having a switchable damping resistance coupled in parallel with an inductor. The damping resistance is decoupled from the inductor by rendering a transistor nonconductive when a direction of current in the inductor changes. The damping resistance is then coupled to the inductor before oscillations begin in the current in the inductor. The decoupling of the damping resistor eliminates power dissipation in the damping resistor during a change in the direction of current in the inductor.
摘要翻译： 描述了具有与电感器并联耦合的可切换阻尼电阻的写头。 当电感器中的电流方向改变时，阻尼电阻通过使晶体管不导通而与电感器去耦。 然后在电感器中的电流开始振荡之前，将阻尼电阻耦合到电感器。 阻尼电阻器的去耦可以消除电感器电流方向变化时阻尼电阻器的功耗。
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公开(公告)号：US20130033910A1
公开(公告)日：2013-02-07
申请号：US13204274
申请日：2011-08-05
申请人： Andrea Carletti , Albino Pidutti
发明人： Andrea Carletti , Albino Pidutti
IPC分类号： H02M7/537
CPC分类号： H02M1/42 , H02M1/4208 , H02M3/155 , H02M3/158 , H02M7/12 , H02M7/48 , Y02B70/126
摘要： A power converter includes a DC/AC converter with input terminals and output terminals. A DC/DC converter includes input terminals for receiving a DC input voltage and output terminals for providing a DC output voltage. The output terminals are coupled to the input terminals of the DC/AC converter. The DC/DC converter also includes a control circuit that is configured to control an output current of the DC/DC converter dependent on a reference signal. The reference signal has a frequency that is dependent on a frequency of the AC output voltage.
摘要翻译： 电源转换器包括具有输入端子和输出端子的DC / AC转换器。 DC / DC转换器包括用于接收DC输入电压的输入端子和用于提供DC输出电压的输出端子。 输出端子耦合到DC / AC转换器的输入端子。 DC / DC转换器还包括控制电路，其被配置为根据参考信号来控制DC / DC转换器的输出电流。 参考信号具有取决于AC输出电压的频率的频率。
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6.发明授权Boost capacitor layout technique for an H-bridge integrated circuit motor controller to ensure matching characteristics with that of the low-side switching devices of the bridge 有权用于H桥集成电路电机控制器的升压电容布局技术，以确保匹配特性与桥接器低端开关器件的匹配特性公开(公告)号：US07138321B2
公开(公告)日：2006-11-21
申请号：US10853583
申请日：2004-05-25
申请人： Albino Pidutti
发明人： Albino Pidutti
IPC分类号： H01L21/22
CPC分类号： H03K17/6872 , G11B5/022 , H03K17/04106 , H03K2217/0045
摘要： An H-bridge circuit having a boost capacitor coupled to the gate of the low-side driver. A driver, in the form of a switching transistor is connected between the load and ground, thus providing a low-side driver. A capacitor is coupled to the gate of the low-side driver to provide a boosted voltage for rapid turn on of the gate. The size of the capacitor selected to be similar to the size of the capacitance associated with the low-side driver transistor.
摘要翻译： 具有耦合到低侧驱动器的栅极的升压电容器的H桥电路。 开关晶体管形式的驱动器连接在负载和地之间，从而提供低端驱动器。 电容器耦合到低侧驱动器的栅极，以提供用于快速导通栅极的升压电压。 选择的电容器的尺寸与与低侧驱动晶体管相关的电容的大小相似。
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7.发明授权Circuit for the programmable protection of output over-voltages in a power factor corrector 有权在功率因数校正器中可编程保护输出过电压的电路公开(公告)号：US07120000B2
公开(公告)日：2006-10-10
申请号：US10631670
申请日：2003-07-31
申请人： Albino Pidutti , Stefano Beria
发明人： Albino Pidutti , Stefano Beria
CPC分类号： H02M1/4225 , Y02B70/126 , Y02P80/112
摘要： The present invention refers to a switching power supply, in particular to a power factor corrector, and more particularly to a circuit for the programmable protection against output over-voltages. It also refers to a power factor corrector integrated circuit comprising a circuit for the programmable protection against output over-voltages. In one embodiment the circuit for the programmable protection against output over-voltages in a power Factor corrector comprises means for detecting a signal proportional to the output voltage; a first preset reference voltage; a second preset reference voltage; a transconductance amplifier which receives in input the signal proportional to the output voltage and the first preset reference voltage; a comparator which receives in input the signal proportional to the output voltage and the second preset reference voltage; means suitable for absorbing a current coming from the signal proportional to the output voltage.
摘要翻译： 本发明涉及开关电源，特别是功率因数校正器的开关电源，更具体地，涉及用于可编程保护以防止输出过电压的电路。 它还涉及功率因数校正器集成电路，其包括用于可编程保护以防止输出过电压的电路。 在一个实施例中，用于在功率因数校正器中防止输出过电压的可编程保护的电路包括用于检测与输出电压成比例的信号的装置; 第一预设参考电压; 第二预设参考电压; 跨导放大器，其在输入端接收与输出电压和第一预置参考电压成比例的信号; 比较器，其在输入端接收与输出电压成正比的信号和第二预置参考电压; 适用于吸收与输出电压成比例的信号的电流。
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公开(公告)号：US06538346B2
公开(公告)日：2003-03-25
申请号：US09740726
申请日：2000-12-18
申请人： Albino Pidutti , Mario Scurati
发明人： Albino Pidutti , Mario Scurati
IPC分类号： H01B124
CPC分类号： H02M3/156 , H02M2003/1555 , Y02B70/1425 , Y10T307/50 , Y10T307/76 , Y10T307/826 , Y10T307/839
摘要： A circuit to control the supply of a reactive load, for supplying variable quantities of energy to the load in a predetermined manner is included in a system. The system also includes reactive components which are connected to the load by way of a controllable electronic switch and which form a resonant circuit with the load when the electronic switch is closed. Further, the system includes a circuit for activating the electronic switch, and a control unit which coordinates the operation of the controlled supply circuit and of the activation circuit in accordance with a predetermined program. The system enables the load to be driven with a particularly low power dissipated.
摘要翻译： 用于控制用于以预定方式向负载供应可变量的能量的无功负载的供应的电路被包括在系统中。 该系统还包括通过可控电子开关连接到负载并且当电子开关闭合时与负载形成谐振电路的无功部件。 此外，该系统包括用于激活电子开关的电路，以及控制单元，其根据预定程序协调受控供电电路和激活电路的操作。 该系统能够以特别低的功率耗散驱动负载。
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公开(公告)号：US06181031B2
公开(公告)日：2001-01-30
申请号：US09200297
申请日：1998-11-25
申请人： Albino Pidutti , Mario Scurati
发明人： Albino Pidutti , Mario Scurati
IPC分类号： H01B124
CPC分类号： H05B33/08 , Y10T307/839
摘要： A circuit to control the supply of a reactive load, for supplying variable quantities of energy to the load in a predetermined manner is included in a system. The system also includes reactive components which are connected to the load by way of a controllable electronic switch and which form a resonant circuit with the load when the electronic switch is closed. Further, the system includes a circuit for activating the electronic switch, and a control unit which coordinates the operation of the controlled supply circuit and of the activation circuit in accordance with a predetermined program. The system enables the load to be driven with a particularly low power dissipated.
摘要翻译： 用于控制用于以预定方式向负载供应可变量的能量的无功负载的供应的电路被包括在系统中。 该系统还包括通过可控电子开关连接到负载并且当电子开关闭合时与负载形成谐振电路的无功部件。 此外，该系统包括用于激活电子开关的电路，以及控制单元，其根据预定程序协调受控供电电路和激活电路的操作。 该系统能够以特别低的功率耗散驱动负载。
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公开(公告)号：US5146109A
公开(公告)日：1992-09-08
申请号：US736003
申请日：1991-07-25
申请人： Fabrizio Martignoni , Claudio Diazzi , Albino Pidutti , Fabio Vio
发明人： Fabrizio Martignoni , Claudio Diazzi , Albino Pidutti , Fabio Vio
IPC分类号： H03K17/567 , H03K3/356 , H03K17/687 , H03K19/0185
CPC分类号： H03K3/35613 , H03K3/356034
摘要： A driving circuit for driving a floating circuit (28) responsive to a digital signal (IN) includes two DMOS transistors (10, 12) which are driven in opposite phase on their respective gates starting from the digital signal. The two DMOS transistors are biased by a current source which is formed by a current mirror (16, 18), which mirrors a reference current (I.sub.BIAS), and by an auxiliary circuit (34-44) for injecting an additional current pulse during switching. Two MOS transistors (20, 22) serve as the respective loads for the two DMOS transistors. The MOS transistors can be P-channel transistors, in which event the gate of each MOS transistor (20, 22) can be connected to the drain of the other MOS transistor. Two Zener diodes (24, 26) can be employed to limit the voltage between the gate and source of the respective MOS transistor. The driving output of the floating circuit (28) can be the drain of one of the DMOS transistors.
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