公开(公告)号：USRE43291E1

公开(公告)日：2012-04-03

申请号：US12792998

申请日：2010-06-03

申请人： Terry J. Groom

发明人： Terry J. Groom

IPC分类号： G05F1/40 ,  G05F1/56 ,  H02H7/00

CPC分类号： H02M3/1588 ,  H02M3/157 ,  H02M2001/0012 ,  Y02B70/1466

摘要： To prevent a voltage glitch in the regulated DC output voltage of a PWM/PFM DC-DC converter when switching between PFM and PMW modes, the error amplifier of the converter's PWM regulation path is provided with a DC voltage offset correction mechanism. This mechanism “zeros-out” DC voltage offsets that may be present in the voltage regulation path, thereby enabling the error amplifier to accurately regulate the converter's output voltage. When the converter transitions between PFM and PWM modes, the DC offset correction mechanism establishes initial conditions of the error amplifier that effectively ensure that the converter's regulated output voltage at the beginning of a new “switched-to” PWM mode cycle is DC offset-free.

摘要翻译： 为了防止在PFM和PMW模式之间切换PWM / PFM DC-DC转换器的稳压直流输出电压时的电压毛刺，变换器PWM调节通路的误差放大器配有直流电压补偿校正机构。 该机制可能存在于电压调节路径中的“零”输出直流电压偏移，从而使误差放大器能够精确地调节转换器的输出电压。 当转换器在PFM和PWM模式之间转换时，DC偏移校正机制建立了误差放大器的初始条件，有效地确保了在新的“开关”PWM模式周期开始时转换器的稳压输出电压为无直流偏移 。

公开(公告)号：US20120074924A1

公开(公告)日：2012-03-29

申请号：US13034416

申请日：2011-02-24

申请人： Noel B. Dequina ,  M. Jason Houston

发明人： Noel B. Dequina ,  M. Jason Houston

IPC分类号： H02M3/155

CPC分类号： H02M3/158 ,  H02M3/156 ,  H02M2001/0003

摘要： An open loop modulation network for a voltage regulator including a latch network, an output sense network, a timing network, and pulse control logic. The latch network latches assertion of a pulse control signal and provides a corresponding latched control pulse indication. The output sense network detects initiation of an output pulse and provides a corresponding output pulse indication. The timing network initiates a delay period in response to the output pulse indication and resets the latched control pulse indication after expiration of the delay period. The pulse control logic terminates the output pulse after the latched control pulse indication is reset and the pulse control signal is negated, whichever occurs last. Very narrow input pulses are detected and either a minimum output pulse is generated or the output pulse is based on the pulse control signal.

摘要翻译： 一种用于电压调节器的开环调制网络，包括锁存网络，输出检测网络，定时网络和脉冲控制逻辑。 锁存网络锁存脉冲控制信号的断言并提供对应的锁存控制脉冲指示。 输出检测网络检测输出脉冲的启动并提供相应的输出脉冲指示。 定时网络响应于输出脉冲指示启动延迟时段，并且在延迟时间期满之后复位锁存的控制脉冲指示。 在锁存的控制脉冲指示被复位并且脉冲控制信号被否定之后，脉冲控制逻辑终止输出脉冲，以最后发生者为准。 检测到非常窄的输入脉冲，并且产生最小输出脉冲，或者输出脉冲基于脉冲控制信号。

公开(公告)号：US08134113B2

公开(公告)日：2012-03-13

申请号：US13092058

申请日：2011-04-21

申请人： Dong Zheng ,  Daryl Chamberlin ,  Hung Chou

发明人： Dong Zheng ,  Daryl Chamberlin ,  Hung Chou

IPC分类号： G11B7/00 ,  G01J1/44

CPC分类号： G11B7/1275 ,  G11B7/131 ,  G11B2007/0006 ,  G11B2007/0013

摘要： In accordance with an embodiment, a circuit includes a photodetector (PD) array including a plurality of electrically isolated PD sections. Additionally, the circuit includes a switching matrix that includes a plurality of inputs and a plurality of outputs, and that can be selectively configured in a plurality of different switch configurations. Each of the electrically isolated PD sections is adapted to detect light (if any) and provide an electrical output signal, indicative of the light detected by the PD section (if any), to a different one of the inputs of the switching matrix. The switching matrix is adapted to combine the electrical output signals provided by the electrically isolated PD sections in a plurality of different manners, in dependence on which of the plurality of different switch configurations is selected.

摘要翻译： 根据实施例，电路包括包括多个电隔离的PD部分的光电检测器（PD）阵列。 此外，电路包括包括多个输入和多个输出的开关矩阵，并且可以选择性地配置为多个不同的开关配置。 电隔离的PD部分中的每一个适于检测光（如果有的话），并提供指示由PD部分（如果有的话）检测到的光的电输出信号到开关矩阵的不同输入端。 开关矩阵适于根据多个不同的开关配置选择多个不同的方式组合由电隔离的PD部分提供的电输出信号。

公开(公告)号：US20120049820A1

公开(公告)日：2012-03-01

申请号：US13094007

申请日：2011-04-26

申请人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

发明人： Zaki Moussaoui ,  Jifeng Qin ,  Joseph Buxton

IPC分类号： G05F1/618

CPC分类号： H02M1/36 ,  H02M3/1582

摘要： A system and method for reducing negative inductor current during soft start of a bidirectional direct current (DC)-to-DC converter is provided. Typically, the bidirectional DC-to-DC converter includes an active switch and a passive switch. The system employs a soft start circuit that controls the duty cycle of the passive switch during soft start of the active switch. In one aspect, the soft start circuit gradually increases the duty cycle of the passive switch from zero to a steady state value, and provides a soft start for the passive switch concurrently/simultaneously during the soft start of the active switch. Moreover, the soft start circuit disclosed herein can avoid the reverse transient inductor current during start-up, prevent system damage and make the design of the bidirectional DC-to-DC converter more robust.

摘要翻译： 提供了一种用于在双向直流（DC）至DC转换器的软启动期间减小负电感电流的系统和方法。 通常，双向DC-DC转换器包括有源开关和无源开关。 该系统采用软起动电路，在有源开关的软启动期间控制无源开关的占空比。 在一个方面，软启动电路逐渐将无源开关的占空比从零增加到稳态值，并且在有源开关的软启动期间同时/同时提供无源开关的软启动。 此外，本文公开的软启动电路可以避免启动期间的反向瞬态电感器电流，防止系统损坏并且使双向DC-DC转换器的设计更加坚固。

公开(公告)号：US08101511B2

公开(公告)日：2012-01-24

申请号：US12774762

申请日：2010-05-06

申请人： Dev Alok Girdhar ,  Michael David Church ,  Alexander Kalnitsky

发明人： Dev Alok Girdhar ,  Michael David Church ,  Alexander Kalnitsky

IPC分类号： H01L21/28 ,  H01L21/44

CPC分类号： H01L29/872 ,  H01L27/0629 ,  H01L29/456 ,  H01L29/47 ,  H01L29/7833

摘要： An integrated circuit, including a junction barrier Schottky diode, has an N type well, a P-type anode region in the surface of the well, and an N-type Schottky region in the surface of the well and horizontally abutting the anode region. A first silicide layer is on and makes a Schottky contact to the Schottky region and is on an adjoining anode region. A second silicide layer of a different material than the first silicide is on the anode region. An ohmic contact is made to the second silicide on the anode region and to the well.

摘要翻译： 包括结势垒肖特基二极管的集成电路具有N型阱，阱表面中的P型阳极区域和阱表面中的N型肖特基区域，并且水平地邻接阳极区域。 第一硅化物层在肖特基区域上并与其相邻的阳极区域形成肖特基接触。 与第一硅化物不同的第二硅化物层位于阳极区上。 对阳极区域和阱的第二硅化物进行欧姆接触。

公开(公告)号：US08085017B2

公开(公告)日：2011-12-27

申请号：US12873102

申请日：2010-08-31

申请人： Weihong Qiu ,  Robert H. Isham ,  Chun Cheung

发明人： Weihong Qiu ,  Robert H. Isham ,  Chun Cheung

IPC分类号： G05F1/595

CPC分类号： H02M3/1584 ,  H02M2001/0032 ,  H02M2001/0041 ,  H02M2003/1586 ,  Y02B70/16

摘要： A pulse control system for a multiphase regulator including an error amplifier, a multiphase generator, and an adaptive controller. The error amplifier provides an error signal indicative of output voltage error. The multiphase generator develops modulation pulses for phases based on the error signal. The adaptive controller is responsive to a load indication signal and redirects at least one modulation pulse from a first of phase to a second phase. The load indication signal may be received from a microprocessor indicating a low power mode. The adaptive controller provides a smooth and efficient transition to low load conditions by dropping operation of one or more phases and redirecting modulation pulses to the remaining one or more phases, and reduced phases improve power efficiency for the low load conditions.

摘要翻译： 一种用于多相调节器的脉冲控制系统，包括误差放大器，多相发生器和自适应控制器。 误差放大器提供指示输出电压误差的误差信号。 多相发生器根据误差信号产生相位调制脉冲。 自适应控制器响应于负载指示信号并将至少一个调制脉冲从第一相重定向到第二相。 可以从指示低功率模式的微处理器接收负载指示信号。 自适应控制器通过丢弃一个或多个相的操作并将调制脉冲重定向到剩余的一个或多个相位来提供对低负载条件的平滑和有效的转换，并且降低的相位提高了低负载条件下的功率效率。

公开(公告)号：US08081028B2

公开(公告)日：2011-12-20

申请号：US12346211

申请日：2008-12-30

申请人： Michael A. Kost

发明人： Michael A. Kost

IPC分类号： H03F3/38 ,  H03G11/00

CPC分类号： H03F3/2173 ,  H03F1/523 ,  H03F3/185 ,  H04R3/007

摘要： Systems and methods for implementing over-current protection in amplifiers are provided, including systems, methods and devices for specifying a clip level at which to clip an audio signal in response to an over-current condition being detected. In an embodiment, the clip level is reduced while the over-current condition is being detected. Once the over-current condition is no longer detected, the clip level is maintained for a specified period before allowing the clip level to be increased. In an embodiment, the specified period, for which the clip level is maintained before the clip level is allowed to be increased, starts when the over-current condition is no longer detected, and ends when each of N immediately preceding sample(s) of the audio signal are not clipped to the clip level, where N is an integer, and N≧1. After an over-current condition is no longer detected, and after the clip level has been maintained for the specified period, the clip level can be increased if an over-current condition is not detected for a sample and the clip level is below a specified maximum clip level.

摘要翻译： 提供了用于在放大器中实现过电流保护的系统和方法，包括系统，方法和装置，用于指定针对正在检测的过电流状况来剪辑音频信号的剪辑电平。 在一个实施例中，在检测到过电流条件的同时，减少电平。 一旦不再检测到过电流条件，则在允许增加剪辑级别之前，将剪辑级别保持指定的时间段。 在一个实施例中，在不再检测到过电流状态的情况下，在允许增加剪辑级别之前保持剪辑级别的指定时段开始，并且当N个紧邻在前的样本 音频信号不会剪辑到剪辑级别，其中N是整数，N≥1。 在不再检测到过电流状态之后，并且在剪辑级别已经维持指定的时间段之后，如果对于样本未检测到过电流状况并且剪辑级别低于指定的范围，则可以增加剪辑级别 最大剪辑级别。

公开(公告)号：US08076922B2

公开(公告)日：2011-12-13

申请号：US12136023

申请日：2008-06-09

申请人： Jia Wei ,  Michael Jason Houston

发明人： Jia Wei ,  Michael Jason Houston

IPC分类号： H01F29/14

摘要： An embodiment of an inductor assembly includes a core, a first conductor, and a second conductor. The core includes first and second members, a first group of one or more forms extending between the members, a second group of one or more forms extending between the members, and an isolating region that magnetically isolates the first group of forms from the second group of forms. The first conductor is wound about a first one of the forms in the first group, and the second conductor is wound about a second one of the forms in the second group. Such an inductor assembly may allow both coupled and uncoupled inductors to be disposed on a common core, thus potentially reducing the cost and size of the inductors as compared to the coupled inductors being disposed on one core and the uncoupled inductors being disposed on another core.

公开(公告)号：US20110241636A1

公开(公告)日：2011-10-06

申请号：US13160162

申请日：2011-06-14

申请人： XUELIN WU ,  CONGZHONG HUANG ,  SHEA PETRICEK

发明人： XUELIN WU ,  CONGZHONG HUANG ,  SHEA PETRICEK

IPC分类号： G05F1/618

CPC分类号： H02M3/1584 ,  H02M3/1582 ,  H02M3/1588 ,  Y02B70/1466

摘要： A multi-phase non-inverting buck boost voltage converter has a plurality of buck boost voltage regulators. Each regulator is associated with a separate phase for generating a regulated output voltage responsive to an input voltage. A plurality of current sensors are each associated with one of the plurality of buck boost voltage regulators for monitoring an input current to the associated buck boost voltage regulator and generating a current sense signal for the associated phase. A plurality of buck boost mode control circuitries are each associated with one of the buck boost regulator for controlling an associated buck boost voltage regulator using peak current mode control in a buck mode of operation and valley current mode control in boost mode of operation responsive to a common error voltage and the associated current sense signal. The plurality of buck boost mode control circuitries provides current balancing between the phases. A voltage error circuit generates the error voltage responsive to the regulated output voltage

摘要翻译： 多相非反相降压升压电压转换器具有多个降压升压稳压器。 每个调节器与单独的相关联，用于响应输入电压产生稳定的输出电压。 多个电流传感器各自与多个降压升压电压调节器中的一个相关联，用于监视到相关联的降压升压电压调节器的输入电流，并为相关联的相产生电流检测信号。 多个降压升压模式控制电路各自与降压升压调节器中的一个相关联，所述降压升压调节器用于在降压操作模式下使用峰值电流模式控制来控制相关联的降压升压电压调节器，并且响应于一个升压模式 常见的误差电压和相关的电流检测信号。 多个降压升压模式控制电路提供相间的电流平衡。 电压误差电路响应于调节的输出电压产生误差电压

公开(公告)号：US20110234193A1

公开(公告)日：2011-09-29

申请号：US12878529

申请日：2010-09-09

申请人： Steven P. Laur ,  Rhys S.A. Philbrick

发明人： Steven P. Laur ,  Rhys S.A. Philbrick

IPC分类号： G05F3/02

CPC分类号： G05F1/59 ,  H02M3/1584 ,  H02M2003/1586

摘要： A phase current sharing network for a current mode multiphase switching regulator. The multiphase switching regulator includes switching networks for developing phase currents of switching phase networks controlled by pulse control signals for converting an input voltage to an output voltage. The regulator develops the pulse control signals based on current control values and at least one trigger value. The phase current sharing network includes conversion networks and a phase current combining network. Each conversion network provides a phase current value based on a corresponding phase current, such as by directly or indirectly measuring real current or by synthetically developing the phase current value. The phase current combining network develops an average phase current value based on the phase current values, and subtracts the average phase current value from each phase current value to provide the current control values used to control the switching networks.

摘要翻译： 用于电流模式多相开关稳压器的相电流共享网络。 多相开关调节器包括用于开发用于将输入电压转换为输出电压的脉冲控制信号控制的开关相位网络的相电流的开关网络。 调节器根据电流控制值和至少一个触发值开发脉冲控制信号。 相电流共享网络包括转换网络和相电流组合网络。 每个转换网络基于对应的相电流提供相电流值，例如通过直接或间接测量实际电流或通过合成开发相电流值。 相电流组合网络基于相电流值产生平均相电流值，并从每相电流值中减去平均相电流值，以提供用于控制开关网络的电流控制值。