Power management circuit and method
    1.
    发明授权
    Power management circuit and method 有权
    电源管理电路及方法

    公开(公告)号:US09531270B2

    公开(公告)日:2016-12-27

    申请号:US13180241

    申请日:2011-07-11

    申请人: Justin Shi

    发明人: Justin Shi

    摘要: A power management circuit and method are described. In the method, whether a first voltage and/or a voltage source are present is determined. Based on a first result of the determination, the first voltage is converted to a second voltage. A boost converter is used to convert the second voltage to a third voltage. Alternatively, based on a second result of the determination, a buck converter is used to convert the third voltage to the second voltage.

    摘要翻译: 描述电源管理电路和方法。 在该方法中,确定是否存在第一电压和/或电压源。 基于确定的第一结果,将第一电压转换为第二电压。 升压转换器用于将第二电压转换成第三电压。 或者,基于确定的第二结果,使用降压转换器将第三电压转换为第二电压。

    Gate driver circuit and method
    2.
    发明授权
    Gate driver circuit and method 有权
    门驱动电路及方法

    公开(公告)号:US09077259B2

    公开(公告)日:2015-07-07

    申请号:US13603480

    申请日:2012-09-05

    申请人: Justin Shi

    发明人: Justin Shi

    摘要: A driver circuit includes first switch, configured to selectively couple a first driving node to a power supply node, and a second switch, configured to selectively couple a second driving node to a ground node. The first driving node is coupled to each transistor in a first set of PMOS transistor(s) and the second driving node is coupled to each transistor in a second set of NMOS transistor(s). The driver circuit is configured to propagate a first drive signal in a first direction along an electrical path for biasing the first and second sets of transistors when the transistors in the first set, before receiving the first drive signal, are in a first state. The driver circuit is configured to propagate a second drive signal in a second direction along the path when the transistors in the first set, before receiving the second drive signal, are in a second state.

    摘要翻译: 驱动器电路包括被配置为选择性地将第一驱动节点耦合到电源节点的第一开关和被配置为选择性地将第二驱动节点耦合到接地节点的第二开关。 第一驱动节点耦合到第一组PMOS晶体管中的每个晶体管,并且第二驱动节点耦合到第二组NMOS晶体管中的每个晶体管。 驱动器电路被配置为沿着电路径沿第一方向传播第一驱动信号,用于当第一组中的晶体管在接收第一驱动信号之前处于第一状态时偏置第一和第二组晶体管。 驱动器电路被配置为当接收到第二驱动信号之前第一组中的晶体管处于第二状态时,沿着路径沿第二方向传播第二驱动信号。

    SINGLE-INDUCTOR MULTIPLE-OUTPUT DC TO DC CONVERTER
    3.
    发明申请
    SINGLE-INDUCTOR MULTIPLE-OUTPUT DC TO DC CONVERTER 有权
    单电感器多路输出直流到直流转换器

    公开(公告)号:US20130082668A1

    公开(公告)日:2013-04-04

    申请号:US13340746

    申请日:2011-12-30

    IPC分类号: G05F1/577

    CPC分类号: H02M3/158 H02M2001/009

    摘要: A DC to DC converter includes a switching circuit and a controller. The switching circuit includes an inductor coupled to first and second voltage supply nodes and to a plurality of output loads. The controller is configured to monitor a current through the inductor and to selectively couple the inductor to each of the plurality of output loads such that at least one of the following criteria is met: 1) an average current through the inductor is minimized for the particular output loads coupled to the switching circuit, or 2) minimize a number of times the switching circuit is switched during a charging period for the particular output loads coupled to the switching circuit.

    摘要翻译: DC-DC转换器包括开关电路和控制器。 开关电路包括耦合到第一和第二电压供应节点和耦合到多个输出负载的电感器。 控制器被配置为监测通过电感器的电流并且选择性地将电感器耦合到多个输出负载中的每一个,使得满足以下标准中的至少一个:1)通过电感器的平均电流对于特定的 耦合到开关电路的输出负载,或2)在耦合到开关电路的特定输出负载的充电周期期间最小化开关电路切换的次数。

    POWER MANAGEMENT CIRCUIT AND METHOD
    4.
    发明申请
    POWER MANAGEMENT CIRCUIT AND METHOD 有权
    电源管理电路和方法

    公开(公告)号:US20130015827A1

    公开(公告)日:2013-01-17

    申请号:US13180241

    申请日:2011-07-11

    申请人: Justin SHI

    发明人: Justin SHI

    IPC分类号: G05F1/46

    摘要: A power management circuit and method are described. In the method, whether a first voltage and/or a voltage source are present is determined. Based on a first result of the determination, the first voltage is converted to a second voltage. A boost converter is used to convert the second voltage to a third voltage, Alternatively, based on a second result of the determination, a buck converter is used to convert the third voltage to the second voltage.

    摘要翻译: 描述了电源管理电路和方法。 在该方法中,确定是否存在第一电压和/或电压源。 基于确定的第一结果,将第一电压转换为第二电压。 升压转换器用于将第二电压转换为第三电压。或者,基于确定的第二结果,使用降压转换器将第三电压转换为第二电压。

    LDO REGULATORS FOR INTEGRATED APPLICATIONS
    5.
    发明申请
    LDO REGULATORS FOR INTEGRATED APPLICATIONS 有权
    集成应用的LDO调节器

    公开(公告)号:US20110089916A1

    公开(公告)日:2011-04-21

    申请号:US12857092

    申请日:2010-08-16

    IPC分类号: G05F1/10

    摘要: Embodiments of the invention are related to LDO regulators. In an embodiment, an amplifier drives the gate of a master source follower and of at least one slave source follower to form an LDO regulator. In an alternative embodiment, a charge pump drives the master source follower to form the regulator. Additional slave source followers may be used in conjunction with the charge pump and the master source follower to improve the regulator performance. Other embodiments are also disclosed.

    摘要翻译: 本发明的实施例涉及LDO调节器。 在一个实施例中,放大器驱动主源跟随器的栅极和至少一个从源极跟随器的栅极以形成LDO调节器。 在替代实施例中,电荷泵驱动主源极跟随器以形成调节器。 附加的从源跟随器可以与电荷泵和主源极跟随器一起使用,以改善调节器的性能。 还公开了其他实施例。

    Class D Amplifier Control Circuit and Method
    6.
    发明申请
    Class D Amplifier Control Circuit and Method 有权
    D类放大器控制电路及方法

    公开(公告)号:US20110006844A1

    公开(公告)日:2011-01-13

    申请号:US12858310

    申请日:2010-08-17

    IPC分类号: H03F3/217

    CPC分类号: H03F3/2173

    摘要: Circuit and method for a Class D amplifier. In one exemplary embodiment, an audio amplifier is disclosed. A closed loop configuration for driving high and low side driver transistors is provided, each circuit is compatible with advanced sub micron semiconductor processes. The analog time varying input is coupled to one input of a sigma delta analog to digital converter. A feedback signal from the output is also input to the analog to digital converter. A bit stream is output by the analog to digital converter. A decimator receives this bit stream and downconverts the samples to digital values at a lower frequency. A digital filter with adaptable coefficients is used to filter that signal and a digital pulse width modulator then develops an analog differential PWM signal. A predriver inputs the PWM signal and derives the output gating signals to control the high and low side drivers of a Class D amplifier.

    摘要翻译: D类放大器的电路和方法。 在一个示例性实施例中,公开了一种音频放大器。 提供用于驱动高侧和低侧驱动晶体管的闭环配置,每个电路与先进的亚微米半导体工艺兼容。 模拟时变输入耦合到Σ-Δ模数转换器的一个输入端。 来自输出的反馈信号也被输入到模数转换器。 位流由模数转换器输出。 抽取器接收该位流,并以较低的频率将样本下变频为数字值。 使用具有适应系数的数字滤波器来对该信号进行滤波,并且数字脉宽调制器然后开发模拟差分PWM信号。 预驱动器输入PWM信号并导出输出门控信号以控制D类放大器的高侧和低侧驱动器。

    Digital control of power converters
    7.
    发明授权
    Digital control of power converters 有权
    电源转换器的数字控制

    公开(公告)号:US07834604B2

    公开(公告)日:2010-11-16

    申请号:US12197790

    申请日:2008-08-25

    IPC分类号: G05F1/40

    摘要: A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse is generated to control the power converter. Another embodiment includes multiple thresholds that may be compared against the digital error signal.

    摘要翻译: 提出了一种用于控制功率转换器的系统和方法。 实施例包括连接到模拟 - 数字转换器的模拟差分电路,并将数字误差信号与至少第一阈值进行比较。 如果数字误差信号小于第一阈值,则产生脉冲以控制功率转换器。 另一实施例包括可与数字误差信号进行比较的多个阈值。

    CLASS D AMPLIFIER CONTROL CIRCUIT AND METHOD
    8.
    发明申请
    CLASS D AMPLIFIER CONTROL CIRCUIT AND METHOD 审中-公开
    等级放大器控制电路和方法

    公开(公告)号:US20100045376A1

    公开(公告)日:2010-02-25

    申请号:US12197967

    申请日:2008-08-25

    IPC分类号: H03F3/217

    CPC分类号: H03F3/2173

    摘要: Circuit and method for a Class D amplifier. In one exemplary embodiment, an audio amplifier is disclosed. A closed loop configuration for driving high and low side driver transistors is provided, each circuit is compatible with advanced sub micron semiconductor processes. The analog time varying input is coupled to one input of a sigma delta analog to digital converter. A feedback signal from the output is also input to the analog to digital converter. A bit stream is output by the analog to digital converter. A decimator receives this bit stream and downconverts the samples to digital values at a lower frequency. A digital filter with adaptable coefficients is used to filter that signal and a digital pulse width modulator then develops an analog differential PWM signal. A predriver inputs the PWM signal and derives the output gating signals to control the high and low side drivers of a Class D amplifier.

    摘要翻译: D类放大器的电路和方法。 在一个示例性实施例中,公开了一种音频放大器。 提供用于驱动高侧和低侧驱动晶体管的闭环配置,每个电路与先进的亚微米半导体工艺兼容。 模拟时变输入耦合到Σ-Δ模数转换器的一个输入端。 来自输出的反馈信号也被输入到模数转换器。 位流由模数转换器输出。 抽取器接收该位流,并以较低的频率将样本下变频为数字值。 使用具有适应系数的数字滤波器来对该信号进行滤波,并且数字脉宽调制器然后开发模拟差分PWM信号。 预驱动器输入PWM信号并导出输出门控信号以控制D类放大器的高侧和低侧驱动器。

    APPARATUS AND METHOD OF OPTIMIZING DATABASE CLUSTERING WITH ZERO TRANSACTION LOSS
    9.
    发明申请
    APPARATUS AND METHOD OF OPTIMIZING DATABASE CLUSTERING WITH ZERO TRANSACTION LOSS 审中-公开
    用零交易损失优化数据库聚类的装置和方法

    公开(公告)号:US20080046400A1

    公开(公告)日:2008-02-21

    申请号:US11776143

    申请日:2007-07-11

    IPC分类号: G06F17/30

    摘要: An efficient database cluster system that uses multiple stand-alone database servers with independent datasets to deliver higher processing speed and higher service availability at the same time with zero transaction losses. In one embodiment, a dynamic serializing transaction replication engine with dynamic load balancing for read-only queries is implemented. In another embodiment, a non-stop database resynchronization method that can resynchronize one or more out-of-sync databases without shutting down the cluster automatic database resynchronization process is implemented. In yet another embodiment, an embedded concurrency control language is implemented in the replication engine for precise control of the dynamic serialization engine for optimal processing performance. In yet another embodiment, a zero-downtime gateway failover/failback scheme using a public Internet Protocol (IP) is implemented. In yet another embodiment, a horizontal data partitioning method for load balancing update queries is implemented.

    摘要翻译: 一个高效的数据库集群系统,使用具有独立数据集的多个独立数据库服务器,同时实现零交易损失,提供更高的处理速度和更高的服务可用性。 在一个实施例中,实现了具有用于只读查询的动态负载平衡的动态序列化事务复制引擎。 在另一个实施例中,实现了可以在不关闭集群自动数据库重新同步过程的情况下重新同步一个或多个不同步数据库的不间断数据库重新同步方法。 在另一个实施例中,在复制引擎中实现嵌入式并发控制语言,用于精确控制动态序列化引擎以获得最佳处理性能。 在另一个实施例中,实现使用公共网际协议(IP)的零停机时间网关故障切换/故障恢复方案。 在又一个实施例中,实现了用于负载平衡更新查询的水平数据分割方法。

    Spread spectrum power converter
    10.
    发明授权
    Spread spectrum power converter 有权
    扩频功率转换器

    公开(公告)号:US09531271B2

    公开(公告)日:2016-12-27

    申请号:US13406337

    申请日:2012-02-27

    申请人: Justin Shi

    发明人: Justin Shi

    摘要: A power converter includes a first stage voltage modulator configured to receive an input voltage and provide a modulated voltage. A second stage power converter is configured to receive the modulated voltage and vary a switching frequency of the second stage power converter in accordance with the modulated voltage to provide an output voltage.

    摘要翻译: 功率转换器包括被配置为接收输入电压并提供调制电压的第一级电压调制器。 第二级功率转换器被配置为接收调制电压并根据调制电压改变第二级功率转换器的开关频率以提供输出电压。