公开(公告)号：US06754688B2

公开(公告)日：2004-06-22

申请号：US09783235

申请日：2001-02-14

申请人： Giao Pham ,  Mathew J. Parker

发明人： Giao Pham ,  Mathew J. Parker

IPC分类号： G06F742

CPC分类号： G06F7/485 ,  G06F5/012 ,  G06F7/026

摘要： An apparatus and method for determining whether two operands are less than two are disclosed. A first module generates first detection bits from a first operand and a second operand, where the first detection bits indicate a difference of zero. A second module generates second detection bits from the first and second operands, where the second detection bits indicate a difference of one. A combiner combines the first and second detection bits to determine whether the difference of two numbers is less than two. The apparatus and method is used in determining to bypass normalization in floating point calculation.

摘要翻译： 公开了一种用于确定两个操作数是否小于2的装置和方法。 第一模块从第一操作数和第二操作数产生第一检测位，其中第一检测位指示零差值。 第二模块从第一和第二操作数产生第二检测位，其中第二检测位指示一差异。 组合器组合第一和第二检测位以确定两个数字的差异是否小于2。 该装置和方法用于确定在浮点计算中绕过规范化。

公开(公告)号：US20090185396A1

公开(公告)日：2009-07-23

申请号：US12412122

申请日：2009-03-26

申请人： Stefan Baurle ,  Giao Pham

发明人： Stefan Baurle ,  Giao Pham

IPC分类号： H02M3/335

CPC分类号： H02M3/33515 ,  H02M3/33507

摘要： An apparatus of regulating a power converter with multiple operating modes includes a switch coupled to an energy transfer element coupled between an input and an output of the power converter. A control circuit is also included, which is coupled to the switch to control the switch. The control circuit includes first and second duty cycle control modes to regulate power delivered to the output of the power converter. A transition between the first and second duty cycle control modes is responsive to a magnitude of a current flowing in the switch reaching a current threshold value.

摘要翻译： 调节具有多个操作模式的功率转换器的装置包括耦合到耦合在功率转换器的输入和输出之间的能量传递元件的开关。 还包括控制电路，其耦合到开关以控制开关。 控制电路包括第一和第二占空比控制模式以调节输送到功率转换器的输出端的功率。 第一和第二占空比控制模式之间的转换响应于在开关中流动的电流的幅度达到当前阈值。

公开(公告)号：US20050200395A1

公开(公告)日：2005-09-15

申请号：US10798751

申请日：2004-03-10

申请人： Giao Pham

发明人： Giao Pham

IPC分类号： H02M3/155 ,  H02M1/00 ,  H02M1/32 ,  H02M3/158 ,  H03B1/00 ,  H03K19/00

CPC分类号： H02M1/32 ,  H02M3/158

摘要： A low power method and apparatus for selecting operational modes of a circuit. One circuit according to the teachings of the disclosed method and apparatus includes a first current limiting circuit coupled between a selector terminal and a first voltage bus. The first current limiting circuit is adapted to vary a current limit out of the selector terminal in response to a voltage on the selector terminal. The circuit also includes a second current limiting circuit coupled between the selector terminal and a second voltage bus. The second current limiting circuit adapted to vary a current limit into the selector terminal in response to the voltage on the selector terminal.

摘要翻译： 一种用于选择电路的操作模式的低功率方法和装置。 根据所公开的方法和装置的教导的一个电路包括耦合在选择器端子和第一电压总线之间的第一限流电路。 第一限流电路适于响应于选择器端子上的电压而改变选择器端子的电流限制。 电路还包括耦合在选择器端子和第二电压总线之间的第二限流电路。 第二限流电路适于响应于选择器端子上的电压而改变选择器端子的电流限制。

公开(公告)号：US20050134358A1

公开(公告)日：2005-06-23

申请号：US10742545

申请日：2003-12-19

申请人： Giao Pham

发明人： Giao Pham

IPC分类号： H03K17/687 ,  H03K17/16 ,  H03K19/003

CPC分类号： H03K17/164 ,  H03K17/04206 ,  H03K17/167

摘要： A method and an apparatus for implementing a semiconductor switch multi-stage drive circuit. The disclosed method and an apparatus reduce losses in a semiconductor switch when it is turned from an off state to an on state or from an on state to an off state. The reduction in losses is achieved without influencing the dv/dt across the semiconductor switch during a first time period while the semiconductor switch is switching. This reduction in losses is therefore achieved with very little increase in the noise generated due to rapid dv/dt during the first time period when the semiconductor switch is switching. The configuration of the circuitry to achieve this reduction in switching losses is such that benefits are less sensitive to manufacturing tolerances and temperature effects than alternative semiconductor switch drive schemes to achieve similar results.

摘要翻译： 一种用于实现半导体开关多级驱动电路的方法和装置。 所公开的方法和设备减少了半导体开关从关闭状态转换到接通状态或从接通状态到断开状态时的损耗。 在半导体开关切换期间，在第一时间段期间实现损耗的减小而不影响跨越半导体开关的dv / dt。 因此，通过在半导体开关切换的第一时间段期间由于快速dv / dt产生的噪声的增加很小，可以实现损耗的减小。 实现这种减少开关损耗的电路的配置使得对制造公差和温度效应的益处比替代的半导体开关驱动方案更不敏感，以获得类似的结果。

公开(公告)号：US08767414B2

公开(公告)日：2014-07-01

申请号：US13595605

申请日：2012-08-27

申请人： Stefan Bäurle ,  Giao Pham

发明人： Stefan Bäurle ,  Giao Pham

IPC分类号： H02M3/335

CPC分类号： H02M3/33515 ,  H02M3/33507

摘要： An example controller for use in a power converter includes an oscillator that is to be coupled to a switch of the power converter to determine a switching cycle period of the switch. The controller also includes means for controlling a duty cycle of the switch to regulate an output of the power converter and for maintaining a substantially constant rate of change of the duty cycle with respect to changes in a magnitude of a feedback signal as the controller transitions between duty cycle control modes such that a control loop gain of the power converter is substantially constant during the transition.

摘要翻译： 用于功率转换器的示例性控制器包括要耦合到功率转换器的开关以确定开关的开关周期周期的振荡器。 控制器还包括用于控制开关的占空比以调节功率转换器的输出的装置，并且用于当控制器在反馈信号的幅度之间转变时相对于反馈信号的幅度的变化保持占空比的基本上恒定的变化率 占空比控制模式，使得功率转换器的控制环路增益在转换期间基本上是恒定的。

公开(公告)号：US20090256536A1

公开(公告)日：2009-10-15

申请号：US12488455

申请日：2009-06-19

申请人： Giao Pham

发明人： Giao Pham

IPC分类号： G05F1/40

CPC分类号： H02M3/33507 ,  H02M3/156

摘要： An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. An integrated circuit according to aspects of the present invention regulates an output of a power supply and includes a switch coupled to receive an external current. The integrated circuit also includes a controller coupled to the switch to control a switching of the external current by the switch in response to an external control signal and an internal current sense signal. The internal current sense signal is proportional to a current in the switch. The output of the power supply is also regulated in the absence of the internal current sense signal.

摘要翻译： 公开了提供响应于电流的脉宽调制信号的装置和方法。 根据本发明的方面的集成电路调节电源的输出并且包括耦合以接收外部电流的开关。 集成电路还包括耦合到开关的控制器，以响应于外部控制信号和内部电流感测信号来控制开关的外部电流的切换。 内部电流检测信号与开关中的电流成比例。 在没有内部电流检测信号的情况下，电源的输出也被调节。

公开(公告)号：US07567066B2

公开(公告)日：2009-07-28

申请号：US11543570

申请日：2006-10-04

申请人： Giao Pham

发明人： Giao Pham

IPC分类号： G05F1/40 ,  H02M3/335

CPC分类号： H02M3/33507 ,  H02M3/156

摘要： An apparatus and method of providing a pulse width modulated signal that is responsive to a current are disclosed. An integrated circuit according to aspects of the present invention regulates an output of a power supply and includes a switch coupled to receive an external current. The integrated circuit also includes a controller coupled to the switch to control a switching of the external current by the switch in response to an external control signal and an internal current sense signal. The internal current sense signal is proportional to a current in the switch. The output of the power supply is also regulated in the absence of the internal current sense signal.

摘要翻译： 公开了提供响应于电流的脉宽调制信号的装置和方法。 根据本发明的方面的集成电路调节电源的输出并且包括耦合以接收外部电流的开关。 集成电路还包括耦合到开关的控制器，以响应于外部控制信号和内部电流感测信号来控制开关的外部电流的切换。 内部电流检测信号与开关中的电流成比例。 在没有内部电流检测信号的情况下，电源的输出也被调节。

公开(公告)号：US20080084713A1

公开(公告)日：2008-04-10

申请号：US11543543

申请日：2006-10-04

申请人： Stefan Baurle ,  Giao Pham

发明人： Stefan Baurle ,  Giao Pham

IPC分类号： H02M3/335

CPC分类号： H02M3/33515 ,  H02M3/33507

摘要： An apparatus and method of regulating a power converter with multiple operating modes are disclosed. A circuit according to aspects of the present invention includes a switch coupled to an energy transfer element coupled between an input and an output of the power converter. A control circuit is also included, which is coupled to the switch to control the switch. The control circuit includes first and second duty cycle control modes to regulate power delivered to the output of the power converter. A transition between the first and second duty cycle control modes is responsive to a magnitude of a current flowing in the switch reaching a current threshold value.

摘要翻译： 公开了一种调节具有多种工作模式的功率转换器的装置和方法。 根据本发明的方面的电路包括耦合到耦合在功率转换器的输入和输出之间的能量传递元件的开关。 还包括控制电路，其耦合到开关以控制开关。 控制电路包括第一和第二占空比控制模式以调节输送到功率转换器的输出端的功率。 第一和第二占空比控制模式之间的转换响应于在开关中流动的电流的幅度达到当前阈值。

公开(公告)号：US06928572B2

公开(公告)日：2005-08-09

申请号：US09893871

申请日：2001-06-29

申请人： Thomas D. Fletcher ,  Giao Pham

发明人： Thomas D. Fletcher ,  Giao Pham

IPC分类号： G06F1/06 ,  G06F1/10

CPC分类号： G06F1/06

摘要： A clock delay circuit has a plurality of outputs to provide a sequence of clock signals that togther constitute a multistage clock. The circuit further has a delay adjustment input to adjust the timing of the clock signals for at least one of the outputs relative to the clock signals at another of the outputs. In an embodiment, the circuit has a plurality of these delay adjustment inputs. In a further embodiment, the circuit has a plurality of buffer components to delay the clock signals.

摘要翻译： 时钟延迟电路具有多个输出以提供另外构成多级时钟的时钟信号序列。 该电路还具有延迟调整输入，用于相对于在另一个输出处的时钟信号来调节至少一个输出的时钟信号的定时。 在一个实施例中，电路具有多个这些延迟调整输入。 在另一实施例中，电路具有多个缓冲器组件以延迟时钟信号。

公开(公告)号：US20120320634A1

公开(公告)日：2012-12-20

申请号：US13595605

申请日：2012-08-27

申请人： Stefan Bäurle ,  Giao Pham

发明人： Stefan Bäurle ,  Giao Pham

IPC分类号： H02M3/335

CPC分类号： H02M3/33515 ,  H02M3/33507

摘要： An example controller for use in a power converter includes an oscillator that is to be coupled to a switch of the power converter to determine a switching cycle period of the switch. The controller also includes means for controlling a duty cycle of the switch to regulate an output of the power converter and for maintaining a substantially constant rate of change of the duty cycle with respect to changes in a magnitude of a feedback signal as the controller transitions between duty cycle control modes such that a control loop gain of the power converter is substantially constant during the transition.

摘要翻译： 用于功率转换器的示例性控制器包括要耦合到功率转换器的开关以确定开关的开关周期周期的振荡器。 控制器还包括用于控制开关的占空比以调节功率转换器的输出的装置，并且用于当控制器在反馈信号的幅度之间转变时相对于反馈信号的幅度的变化保持占空比的基本上恒定的变化率 占空比控制模式，使得功率转换器的控制环路增益在转换期间基本上是恒定的。