公开(公告)号：US07324025B1

公开(公告)日：2008-01-29

申请号：US11528805

申请日：2006-09-28

申请人： Lei Ding ,  John L. Melanson ,  Xiaofan Fei

发明人： Lei Ding ,  John L. Melanson ,  Xiaofan Fei

IPC分类号： H03M7/00

CPC分类号： H03H17/0671 ,  H03H17/0685 ,  H03M3/344 ,  H03M3/508

摘要： A non-integer CIC interpolation filter is provided for use in sigma-delta digital-to-analog systems, which realizes non-integer interpolation but eliminates the need for coupling of the integrators in the output domain. The present non-integer interpolation filter provides for more attenuation to all of the aliases of the input signal and has eliminated the need of complex computations.

摘要翻译： 提供了一种用于Σ-Δ数模转换系统的非整数CIC内插滤波器，实现非整数插值，但不需要输出域中的积分器耦合。 目前的非整数插值滤波器为输入信号的所有别名提供了更多的衰减，并且消除了复杂计算的需要。

公开(公告)号：US20090322300A1

公开(公告)日：2009-12-31

申请号：US12145807

申请日：2008-06-25

申请人： John L. Melanson ,  Lei Ding

发明人： John L. Melanson ,  Lei Ding

IPC分类号： G05F1/10

CPC分类号： H02M3/1563 ,  H02M2001/0019 ,  H02M2001/0032 ,  Y02B70/16

摘要： A hysteretic buck converter provides improved regulation control, in particular for buck converter standby operation. A comparison circuit compares the output voltage of the buck converter to a waveform that is generated from an indication of the output current of the converter, so that the turn-on time of the converter is advanced as the output current demand increases. The resulting action anticipates a reduction in output voltage due to the increased current, preventing an excursion of the output voltage below the ripple voltage minimum. The turn-off time of the converter is controlled by an upper threshold that limits the ripple voltage maximum. The output current indication may be a measurement of output current, or may be a dynamic value calculated from the input voltage and the output voltage waveform.

摘要翻译： 迟滞降压转换器提供改进的调节控制，特别是对于降压转换器待机操作。 比较电路将降压转换器的输出电压与从转换器的输出电流的指示产生的波形进行比较，使得转换器的导通时间随着输出电流需求的增加而提前。 所产生的动作预期由于增加的电流而导致的输出电压降低，防止输出电压偏离低于纹波电压的最小值。 转换器的关断时间由限制纹波电压最大值的上限阈值控制。 输出电流指示可以是输出电流的测量值，或者可以是从输入电压和输出电压波形计算出的动态值。

公开(公告)号：US08008902B2

公开(公告)日：2011-08-30

申请号：US12145807

申请日：2008-06-25

申请人： John L. Melanson ,  Lei Ding

发明人： John L. Melanson ,  Lei Ding

IPC分类号： G05F1/42

CPC分类号： H02M3/1563 ,  H02M2001/0019 ,  H02M2001/0032 ,  Y02B70/16

摘要： A hysteretic buck converter provides improved regulation control, in particular for buck converter standby operation. A comparison circuit compares the output voltage of the buck converter to a waveform that is generated from an indication of the output current of the converter, so that the turn-on time of the converter is advanced as the output current demand increases. The resulting action anticipates a reduction in output voltage due to the increased current, preventing an excursion of the output voltage below the ripple voltage minimum. The turn-off time of the converter is controlled by an upper threshold that limits the ripple voltage maximum. The output current indication may be a measurement of output current, or may be a dynamic value calculated from the input voltage and the output voltage waveform.

摘要翻译： 迟滞降压转换器提供改进的调节控制，特别是对于降压转换器待机操作。 比较电路将降压转换器的输出电压与从转换器的输出电流的指示产生的波形进行比较，使得转换器的导通时间随着输出电流需求的增加而提前。 所产生的动作预期由于增加的电流而导致的输出电压降低，防止输出电压偏离低于纹波电压的最小值。 转换器的关断时间由限制纹波电压最大值的上限阈值控制。 输出电流指示可以是输出电流的测量值，或者可以是从输入电压和输出电压波形计算出的动态值。

公开(公告)号：US07196648B1

公开(公告)日：2007-03-27

申请号：US11317546

申请日：2005-12-23

申请人： Lei Ding ,  John L. Melanson ,  Xaiofan Fei ,  Johann Gaboriau

发明人： Lei Ding ,  John L. Melanson ,  Xaiofan Fei ,  Johann Gaboriau

IPC分类号： H03M1/66

CPC分类号： H03H17/0685 ,  H03H17/0671

摘要： A non-integer decimation filter for decimating an input value includes a first integrator for integrating the input value in an input sample domain at an input sample rate and for generating a first integral of the input value at its output and a second integrator for integrating the first integral of the input value in the input sample domain at the input sample rate and for generating a second integral at its output. A calculation network is coupled to the outputs of the first and second integrators for combining the outputs of the first and second integrators with corresponding coefficients to generate intermediate output values in an output sample domain. A differentiator is configured to receive the intermediate output values from the calculation network and to generate a decimated output value at an output sample rate in which the output sample rate has a non-integer factor with respect to the input sample rate.

摘要翻译： 用于对输入值进行抽取的非整数抽取滤波器包括：第一积分器，用于以输入采样率对输入采样域中的输入值进行积分，并在其输出端产生输入值的第一积分;以及第二积分器， 在输入采样率的输入采样域中的输入值的第一个积分，并在其输出端产生第二个积分。 计算网络耦合到第一和第二积分器的输出，用于将第一和第二积分器的输出与相应系数组合，以在输出样本域中产生中间输出值。 微分器被配置为从计算网络接收中间输出值，并且以输出采样率产生相对于输入采样率的非整数因子的输出采样率的抽取输出值。

公开(公告)号：US07283076B1

公开(公告)日：2007-10-16

申请号：US11478275

申请日：2006-06-29

申请人： Lei Ding ,  John L. Melanson ,  Xaiofan Fei ,  Bruce Duewer

发明人： Lei Ding ,  John L. Melanson ,  Xaiofan Fei ,  Bruce Duewer

IPC分类号： H03M3/00

CPC分类号： H03H17/0685 ,  H03H17/0275 ,  H03H17/0614

摘要： A method and apparatus for implementing non-integer sample hold operations in a sigma-delta digital-to-analog converter system includes an interpolation filter, a polyphase filter circuit, and a modulator. The polyphase filter circuit is used to virtual upsample a digital input signal by a predetermined non-integer upsample ratio of a relatively large number. The polyphase filter circuit is formed of a long zero-order hold and a short FIR filter so that only several branches associated with the polyphase filter circuit corresponding to output samples immediately after a transition of the digital input signal is required to be calculated, thereby reducing the need to store a large number of filter coefficients and eliminating complex computations.

摘要翻译： 用于在Σ-Δ数模转换器系统中实现非整数采样保持操作的方法和装置包括内插滤波器，多相滤波器电路和调制器。 多相滤波器电路用于以相对较大数量的预定非整数上采样比虚拟上采样数字输入信号。 多相滤波器电路由长零级保持和短FIR滤波器形成，使得仅需要计算与数字输入信号转换之后立即对应于输出样本的多相滤波器电路相关联的多个分支，从而减少 需要存储大量的滤波器系数并消除复杂的计算。

公开(公告)号：US10263532B2

公开(公告)日：2019-04-16

申请号：US13077421

申请日：2011-03-31

申请人： John L. Melanson ,  Eric J. King

发明人： John L. Melanson ,  Eric J. King

IPC分类号： H02M3/22 ,  H02M7/06 ,  H02M1/36 ,  H05B33/08 ,  H02M3/335 ,  H02M1/00

摘要： An electronic system includes two power supplies to supply an operating voltage to a switching power converter. The first power supply, referred to as a start-up power supply, includes a first source follower transistor to conduct a start-up current for a controller and supply an operating voltage for the controller. The controller controls operation of the switching power converter. A second power supply, referred to as an auxiliary power supply, includes a second source follower transistor to conduct a steady-state operational current for the controller and supply an operating voltage for the controller. In at least one embodiment, once the second power supply begins supplying the operating voltage to the controller, the start-up power supply automatically ceases supplying the start-up current to the controller.

公开(公告)号：US09307601B2

公开(公告)日：2016-04-05

申请号：US13539004

申请日：2012-06-29

申请人： Zhaohui He ,  Rahul Singh ,  Eric J. King ,  John L. Melanson ,  William A. Draper

发明人： Zhaohui He ,  Rahul Singh ,  Eric J. King ,  John L. Melanson ,  William A. Draper

IPC分类号： H05B37/00 ,  H05B33/08

CPC分类号： H05B33/0848 ,  H05B33/0815 ,  Y02B20/346

摘要： An electronic lighting system and method described herein control energy provided to an electronic lighting device, such as one or more light-emitting diodes (LEDs) and/or compact fluorescent lamps (CFLs), of the electronic lighting system. A triac-based dimmer phase cuts a line voltage provided to the electronic lighting system. A controller of the electronic lighting system utilizes a probing system to overcome idiosyncrasies of the triac-based dimmer to allow the controller to probe and sense the line voltage. To reduce energy consumption, rather than probing each cycle of the output voltage of the triac-based dimmer, the controller periodically or intermittently probes the output voltage of the triac-based dimmer.

摘要翻译： 本文所述的电子照明系统和方法控制提供给诸如电子照明系统的一个或多个发光二极管（LED）和/或紧凑型荧光灯（CFL）的电子照明装置的能量。 三端双向可控硅开关控制器的调光器相位切断提供给电子照明系统的线路电压。 电子照明系统的控制器利用探测系统来克服基于triac的调光器的特性，以允许控制器探测和感测线路电压。 为了降低能耗，而不是探测基于三端双向可控硅的调光器的输出电压的每个周期，控制器周期性或间歇地探测基于三端双向可控硅的调光器的输出电压。

公开(公告)号：US20150327339A1

公开(公告)日：2015-11-12

申请号：US14801440

申请日：2015-07-16

申请人： John L. Melanson ,  Eric King ,  Rahul Singh

发明人： John L. Melanson ,  Eric King ,  Rahul Singh

IPC分类号： H05B33/08

CPC分类号： H05B33/0815 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/083 ,  H05B33/0845 ,  H05B37/02 ,  H05B39/047 ,  H05B41/28 ,  H05B41/2827 ,  Y02B20/345 ,  Y02B20/346 ,  Y02B20/347

摘要： An LED lighting device includes an auxiliary power supply that supplies power to a control circuit of the LED lighting device that receives an input from a terminal of a light-emitting diode (LED) string of the lighting device that has a substantially lower voltage than the line voltage to which the lighting device is connected. The terminal may be within the LED string, or may be an end of the string. A linear regulator may be operated from the voltage drop across a number of the LEDs in the string so that the energy wasted by the auxiliary power supply is minimized. In other designs, the auxiliary power supply may be intermittently connected in series with the LED string only when needed. The intermittent connection can be used to forward bias a portion of the LED string when the voltage supplied to the LED string is low, increasing overall brightness.

公开(公告)号：US09119262B2

公开(公告)日：2015-08-25

申请号：US14607412

申请日：2015-01-28

申请人： John L. Melanson ,  William Draper

发明人： John L. Melanson ,  William Draper

IPC分类号： H05B33/08 ,  H05B41/28

CPC分类号： H05B33/0851 ,  H05B33/0803 ,  H05B33/0815 ,  H05B33/0821 ,  H05B33/0824 ,  H05B41/28 ,  Y02B20/347

摘要： A light emitting diode (LED) lighting system includes a switching power converter having an input for coupling to an alternating current (AC) power source, an output, and a switch. The LED lighting system also includes an LED lighting subsystem coupled to receive power from the output of the switching power converter. The LED lighting subsystem includes a current source for one or more LEDs, and the current source has a control node and a sense node. The LED lighting system additionally includes a switch state controller coupled to the switching power converter and coupled to the LED lighting subsystem. The switch state controller controls switching of the switch and varies a control current provided to the control node of the current source based on at least a parameter sensed from the sense node.

公开(公告)号：US08749173B1

公开(公告)日：2014-06-10

申请号：US13194699

申请日：2011-07-29

申请人： John L. Melanson ,  Eric J. King ,  Robert T. Grisamore ,  Firas S. Azrai

发明人： John L. Melanson ,  Eric J. King ,  Robert T. Grisamore ,  Firas S. Azrai

IPC分类号： H05B41/36 ,  G05F1/00

CPC分类号： H02M7/06 ,  H02M1/36 ,  H02M3/33507 ,  H02M2001/0006 ,  H05B33/0815 ,  Y02B20/346 ,  Y10T307/352 ,  Y10T307/50

摘要： A system and method includes a controller that alternately enables at least two different current paths for a current flowing through a dimmer when the dimmer is in an OFF mode. In at least one embodiment, enabling and disabling the current paths allows a power supply of the dimmer to continue functioning and provides the controller sufficient voltage to continue functioning. One of the current paths is a low impedance path and another current path is a path to a voltage supply node of a switching power converter controller. In at least one embodiment, the controller generates an impedance control signal to enable a low impedance current path for a current in the dimmer and alternately provide a current path to the voltage supply node for the controller.

摘要翻译： 一种系统和方法包括控制器，当调光器处于关闭模式时，控制器交替地使流过调光器的电流至少两个不同的电流路径。 在至少一个实施例中，启用和禁用当前路径允许调光器的电源继续工作，并为控制器提供足够的电压以继续工作。 电流路径中的一个是低阻抗路径，另一个电流路径是到开关功率转换器控制器的电压供应节点的路径。 在至少一个实施例中，控制器产生阻抗控制信号，以使能用于调光器中的电流的低阻抗电流路径，并交替地向控制器的电压供应节点提供电流路径。