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1. 发明申请

WO2008083180A2 GEOMETRY OF MOS DEVICE WITH LOW ON-RESISTANCE 审中-公开
标题翻译：低导通电阻的MOS器件几何结构
公开(公告)号：WO2008083180A2
公开(公告)日：2008-07-10
申请号：PCT/US2007/088866
申请日：2007-12-26
申请人： MARVELL WORLD TRADE LTD. , SUTARDJA, Sehat , KRISHNAMOORTHY, Ravishanker
发明人： SUTARDJA, Sehat , KRISHNAMOORTHY, Ravishanker
IPC分类号： H01L29/78 , H01L21/336 , H01L27/088
CPC分类号： H01L27/0207 , H01L21/823437 , H01L27/088 , H01L29/0692 , H01L29/0696 , H01L29/41725 , H01L29/41758 , H01L29/4238 , H01L29/78 , H01L29/7835
摘要： A Metal Oxide Semiconductor (MOS) device formed on a substrate and a method for forming the MOS device. The MOS device includes a drain region, a gate region surrounding the drain region, source regions arranged around the gate region and across from the drain region, and bulk regions arranged around the gate region and separating the source regions. The gate region is formed in a loop around the drain region. In this manner, the on-resistance (Ron) of a MOS device is decreased without also increasing the area of the MOS device.
摘要翻译：在衬底上形成的金属氧化物半导体（MOS）器件以及用于形成MOS器件的方法。 MOS器件包括漏极区域，围绕漏极区域的栅极区域，布置在栅极区域周围并且与漏极区域相对的源极区域以及布置在栅极区域周围并分离源极区域的体区域。栅极区域形成为围绕漏极区域的环路。以这种方式，MOS器件的导通电阻（Ron）减小而不增加MOS器件的面积。

2. 发明申请

WO2013090747A1 CURRENT BALANCING CIRCUITS FOR LIGHT-EMITTING-DIODE-BASED ILLUMINATION SYSTEMS 审中-公开
标题翻译：用于发光二极管照明系统的电流平衡电路
公开(公告)号：WO2013090747A1
公开(公告)日：2013-06-20
申请号：PCT/US2012/069792
申请日：2012-12-14
申请人： MARVELL WORLD TRADE LTD. , SUTARDJA, Sehat , KRISHNAMOORTHY, Ravishanker
发明人： SUTARDJA, Sehat , KRISHNAMOORTHY, Ravishanker
IPC分类号： H05B33/08
CPC分类号： H05B33/086 , F21K9/64 , H05B33/0827 , H05B33/083 , H05B33/0845 , H05B33/0857 , H05B33/0863 , H05B33/0866 , H05B37/02
摘要： A system including a first transistor, a second transistor, and a comparator. The first transistor is configured to supply a first current to a first load connected to a first terminal of the first transistor. The second transistor is configured to supply a second current to a second load connected to a first terminal of the second transistor, wherein the first current and the second current have a predetermined ratio. The comparator is configured to compare a voltage at the first terminal of the first transistor or a voltage at the first terminal of the second transistor to a reference voltage, and to adjust, based on the comparison, biasing of the first transistor and the second transistor to maintain the predetermined ratio between the first current and the second current.
摘要翻译：一种包括第一晶体管，第二晶体管和比较器的系统。第一晶体管被配置为向连接到第一晶体管的第一端子的第一负载提供第一电流。第二晶体管被配置为向连接到第二晶体管的第一端子的第二负载提供第二电流，其中第一电流和第二电流具有预定的比率。比较器被配置为将第一晶体管的第一端子处的电压或第二晶体管的第一端子处的电压与参考电压进行比较，并且基于比较来调整第一晶体管和第二晶体管的偏置以保持第一电流和第二电流之间的预定比率。

3. 发明申请

WO2012035434A2 BACK-EMF DETECTION FOR MOTOR CONTROL 审中-公开
标题翻译：用于电机控制的反电动势检测
公开(公告)号：WO2012035434A2
公开(公告)日：2012-03-22
申请号：PCT/IB2011/002606
申请日：2011-09-01
申请人： MARVELL WORLD TRADE LTD. , KRISHNAMOORTHY, Ravishanker , LEONG, Foo, Leng , SUSANTO, Edy
发明人： KRISHNAMOORTHY, Ravishanker , LEONG, Foo, Leng , SUSANTO, Edy
CPC分类号： H02P6/182 , H02P6/187
摘要： Systems, methods, and other embodiments associated with back-EMF detection for motor control are described. In an embodiment, an apparatus includes a drive circuit configured to apply excitation signals to respective inputs of a motor, a signal inhibit circuit configured to convey a signal to inhibit application of the excitation signals during an interval, and a measuring circuit configured to measure a back-electromotive force (EMF) signal crossing a reference signal during the interval.
摘要翻译：描述了与用于电动机控制的反电动势检测相关联的系统，方法和其它实施例。在一个实施例中，一种装置包括：驱动电路，被配置为将激励信号施加到电动机的相应输入;信号禁止电路，被配置为传送信号以阻止在间隔期间施加激励信号;以及测量电路，反电动势（EMF）信号在间隔期间与参考信号交叉。

4. 发明申请

WO2014053917A2 DRIVING A ROTATING DEVICE BASED ON A COMBINATION OF SPEED DETECTION BY A SENSOR AND SENSOR-LESS SPEED DETECTION 审中-公开
标题翻译：基于传感器速度检测和无传感器速度检测的组合驱动旋转装置
公开(公告)号：WO2014053917A2
公开(公告)日：2014-04-10
申请号：PCT/IB2013/002860
申请日：2013-10-02
申请人： MARVELL WORLD TRADE LTD. , LEONG, Foo, Leng , KRISHNAMOORTHY, Ravishanker
发明人： LEONG, Foo, Leng , KRISHNAMOORTHY, Ravishanker
IPC分类号： H02P6/20
CPC分类号： H02P7/06 , G01P3/44 , H02P1/04 , H02P6/182
摘要： Some of the embodiments of the present disclosure provide a method comprising detecting, based on a sensor and a back electromagnetic force generated in a rotating device, a speed of the rotating device; and based on (i) the speed detected using the sensor or (ii) the speed detected using the back electromagnetic force, driving the rotating device.
摘要翻译：本公开的一些实施例提供了一种方法，包括基于传感器和在旋转装置中产生的反向电磁力来检测旋转装置的速度; 并且基于（i）使用传感器检测到的速度，或（ii）使用反电磁力检测的速度，驱动旋转装置。

5. 发明申请

WO2012158496A4 HIGH-VOLTAGE STARTUP CIRCUIT 审中-公开
公开(公告)号：WO2012158496A4
公开(公告)日：2012-11-22
申请号：PCT/US2012/037466
申请日：2012-05-11
申请人： MARVELL WORLD TRADE LTD. , KRISHNAMOORTHY, Ravishanker , PITIGOI-ARON, Radu , CHUI, Siew Yong
发明人： KRISHNAMOORTHY, Ravishanker , PITIGOI-ARON, Radu , CHUI, Siew Yong
IPC分类号： H02M1/36 , H02M7/217
摘要： A system including a power transistor configured to receive an alternating current (AC) line voltage and a control circuit. During a rising portion of a half cycle of the AC line voltage, the control circuit is configured to turn on the power transistor when the AC line voltage reaches a first value and turn off the power transistor when the AC line voltage reaches a second value. The second value is greater than the first value. During a falling portion of the half cycle, the control circuit is configured to turn on the power transistor when the AC line voltage reaches the second value and turn off the power transistor when the AC line voltage reaches the first value.

6. 发明申请

WO2012088505A1 REDUCING VOLTAGE STRESS IN A FLYBACK CONVERTER DESIGN 审中-公开
标题翻译：降低变频器设计中的电压应力
公开(公告)号：WO2012088505A1
公开(公告)日：2012-06-28
申请号：PCT/US2011/067169
申请日：2011-12-23
申请人： MARVELL WORLD TRADE LTD , ZHANG, Hong Liang , DOU, Sen , KRISHNAMOORTHY, Ravishanker , SHU, Biing Long , ZHANG, Wanfeng
发明人： ZHANG, Hong Liang , DOU, Sen , KRISHNAMOORTHY, Ravishanker , SHU, Biing Long , ZHANG, Wanfeng
IPC分类号： H02M3/335
CPC分类号： H02M3/335 , H02M1/36
摘要： Disclosed is flyback converter having a controller that performs a startup switching process when the flyback converter is powered up, and then performs normal switching afterward. The controller includes a pulse generator to generate a control signal for normal switching. During startup switching, the controller may generate a control signal by output every N th pulse from the pulse generator. In another embodiment, the controller may generate pulses based on a sense signal provided from an input section of the flyback converter.
摘要翻译：公开了具有控制器的反激式转换器，该控制器在反激式转换器通电时进行启动切换处理，之后进行正常切换。该控制器包括脉冲发生器，以产生用于正常切换的控制信号。在启动切换期间，控制器可以通过从脉冲发生器输出每第N个脉冲来产生控制信号。在另一个实施例中，控制器可以基于从反激式转换器的输入部分提供的感测信号产生脉冲。

7. 发明申请

WO2014066266A1 METHOD AND APPARATUS TO REDUCE OVERCURRENT DURING THE STARTUP OF A SWITCHING REGULATOR 审中-公开
标题翻译：在开关稳压器启动期间减少过流的方法和装置
公开(公告)号：WO2014066266A1
公开(公告)日：2014-05-01
申请号：PCT/US2013/065973
申请日：2013-10-21
申请人： MARVELL WORLD TRADE LTD.
发明人： SHU, Biing Long , HONG, Jye Sheng , KRISHNAMOORTHY, Ravishanker , CHOI, Jinho
IPC分类号： H02M1/32 , H02M3/28
CPC分类号： H02M1/32 , H02M1/36 , H02M3/33507 , H02M2001/0009
摘要： A power supply apparatus includes an inductor to store and discharge energy and a circuit to charge the inductor using a plurality of charging pulses. The circuit skips a charging pulse of the plurality of charging pulses to reduce overcurrent associated with the inductor.
摘要翻译：电源装置包括用于存储和释放能量的电感器以及使用多个充电脉冲对电感器充电的电路。电路跳过多个充电脉冲的充电脉冲，以减少与电感器相关联的过电流。

8. 发明申请

WO2013027119A2 METHOD AND APPARATUS FOR TRIAC APPLICATIONS 审中-公开
标题翻译： TRIAC应用的方法和装置
公开(公告)号：WO2013027119A2
公开(公告)日：2013-02-28
申请号：PCT/IB2012/001836
申请日：2012-07-25
申请人： MARVELL WORLD TRADE, LTD.
发明人： KRISHNAMOORTHY, Ravishanker , CHUI, Siew, Yong , LI, Jun
CPC分类号： H05B33/0845 , H05B37/0272 , H05B39/08 , H05B41/392 , Y10T307/406
摘要： Aspects of the disclosure provide a circuit. The circuit includes a control circuit and a return path circuit. The control circuit is configured to operate in response to a first conduction angle of a dimmer coupled to the circuit. The first conduction angle is adjusted to control an output power to a first device. The dimmer has a second conduction angle that is independent of the control of the output power to the first device. The return path circuit is configured to provide a return path to enable providing power to a second device in response to the second conduction angle.
摘要翻译：本公开的方面提供电路。电路包括控制电路和返回路径电路。控制电路被配置为响应于耦合到电路的调光器的第一导通角而工作。调整第一导通角以控制第一装置的输出功率。调光器具有与控制第一器件的输出功率无关的第二导通角。返回路径电路被配置为提供返回路径以使得能够响应于第二导通角度向第二设备提供电力。

9. 发明申请

WO2013002941A8 INTEGRATED CIRCUIT COMPRISING A MOSFET HAVING BALLAST RESISTORS AND CORRESPONDING MANUFACTURING METHOD 审中-公开
公开(公告)号：WO2013002941A8
公开(公告)日：2013-01-03
申请号：PCT/US2012/040059
申请日：2012-05-31
申请人： MARVELL WORLD TRADE LTD. , SUTARDJA, Sehat , KRISHNAMOORTHY, Ravishanker , CHUI, Siew Yong
发明人： SUTARDJA, Sehat , KRISHNAMOORTHY, Ravishanker , CHUI, Siew Yong
IPC分类号： H01L29/78 , H01L21/336 , H01L29/08
摘要： An integrated circuit including a well region (156) having a first doping level and a plurality of semiconductor regions (154) implanted in the well region. Each of the plurality of semiconductor regions has a second doping level greater than the first doping level. A plurality of polysilicon regions (202-1, 202-2, 204-1, 204-2; 302-1, 302-2, 304-1, 304-2) arranged on the plurality of semiconductor regions forms a plurality of ballast resistors. The polysilicon regions are respectively connected to the semiconductor regions, which are degenerated below said polysilicon regions so as to create an additional resistivity. The plurality of semiconductor regions constitutes a drain region of a metal-oxide semiconductor field-effect transistor (MOSFET).

10. 发明申请

WO2015110900A1 ACTIVE CLAMP FOR MOTOR DRIVER 审中-公开
标题翻译：主动钳位电机驱动器
公开(公告)号：WO2015110900A1
公开(公告)日：2015-07-30
申请号：PCT/IB2015/000064
申请日：2015-01-24
申请人： MARVELL WORLD TRADE LTD.
发明人： WANG, Yichao , KRISHNAMOORTHY, Ravishanker , LEONG, Kong Yin
IPC分类号： H02P6/08
CPC分类号： H02P6/14 , H02P6/08 , H03K5/08
摘要： An apparatus includes a clamp control circuit configured to control a first current to have a magnitude substantially equal to that of a second current when the second current has a first flow direction. The clamp control circuit is configured to control the first current to be substantially zero when the second current has a second flow direction. A method includes determining a value of a first current, controlling a second current to have a substantially zero value when the first current flows in a first direction, and controlling the second current to have a magnitude substantially equal to that of the first current when the first current flows in a second direction. The first current flows in the first direction when a winding of a motor is being supplied with energy and flows in the second direction when the winding of the motor is discharging energy.
摘要翻译：一种装置包括钳位控制电路，其被配置为当第二电流具有第一流动方向时，控制第一电流具有基本上等于第二电流的幅度的幅度。钳位控制电路被配置为当第二电流具有第二流动方向时，将第一电流控制为基本为零。一种方法包括确定第一电流的值，当第一电流在第一方向上流动时，控制第二电流具有基本上为零的值，以及当第一电流在第一方向上流动时，控制第二电流具有基本上等于第一电流的幅度第一电流沿第二方向流动。当电动机的绕组被供给能量时，第一电流在第一方向上流动，并且当电动机的绕组释放能量时沿第二方向流动。

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