专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US08487546B2 LED lighting system with accurate current control 有权
标题翻译： LED照明系统具有精确的电流控制
公开(公告)号：US08487546B2
公开(公告)日：2013-07-16
申请号：US12339651
申请日：2008-12-19
申请人： John Laurence Melanson
发明人： John Laurence Melanson
IPC分类号： H05B37/02
CPC分类号： H05B33/0815 , H05B33/0818 , H05B33/0848 , H05B33/086 , Y02B20/347
摘要： A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle, modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period.
摘要翻译：公开了一种发光二极管（LED）照明系统及方法。 LED照明系统和方法包括用于精确地控制LED系统中的电流的LED控制器。 LED控制器包括基于LED当前时间段的电流和有效时间段来计算传送到LED系统的实际充电量的组件，其中LED当前时间周期是占空比，以大于并且利用实际电荷量修改并提供在LED当前时间段的未来有效时间段期间要传送的期望目标电荷量。 LED系统和方法还包括将实际电荷量与活动时间段期望的电荷量进行比较的部件，并补偿在未来的有效时间段期间实际电荷量与期望充电量之间的差值。

32. 发明授权

US07860474B1 Circuits and methods for controlling switching noise in switched-mode circuits 有权
标题翻译：用于控制开关电路中开关噪声的电路和方法
公开(公告)号：US07860474B1
公开(公告)日：2010-12-28
申请号：US11452170
申请日：2006-06-13
申请人： Chang Yong Kang , John Laurence Melanson
发明人： Chang Yong Kang , John Laurence Melanson
IPC分类号： H04B1/10
CPC分类号： H04B15/04 , H03F3/2173 , H04B2215/065 , H04B2215/069
摘要： A method of controlling noise in a pulse width modulation circuit includes varying a sample frequency and a range of information levels, wherein each sample within a data sample stream at the sample frequency represents a level within the range of information levels, to shift in frequency noise generated at the sample frequency during encoding of the data sample stream into pulse width modulated patterns.
摘要翻译：一种控制脉冲宽度调制电路中的噪声的方法包括改变采样频率和信号电平范围，其中采样频率下数据采样流内的每个采样信号表示信号电平范围内的电平，以使频率噪声偏移在将数据采样流编码成脉冲宽度调制图案期间以采样频率生成。

33. 发明授权

US07821237B2 Power factor correction (PFC) controller and method using a finite state machine to adjust the duty cycle of a PWM control signal 有权
标题翻译：功率因数校正（PFC）控制器和使用有限状态机的方法来调节PWM控制信号的占空比
公开(公告)号：US07821237B2
公开(公告)日：2010-10-26
申请号：US12107613
申请日：2008-04-22
申请人： John Laurence Melanson
发明人： John Laurence Melanson
IPC分类号： G05F1/00
CPC分类号： H02M1/4225 , H03M3/476 , Y02B70/126 , Y02P80/112
摘要： A power factor correction (PFC) controller and method uses a finite state machine to adjust the duty cycle of a pulse width modulation (PWM) switching control signal. The PFC controller has a target current generator that receives the link output voltage and generates a target current proportionate to the rectified line input voltage. The PFC controller further includes a comparator which outputs a two-level current comparison result signal. The finite state machine responsive to the two-level current comparison result signal, generates a switch control signal that has a duty cycle which is adjusted for controlling the switch so that the sensed current is approximately proportionate to the rectified line input voltage, such that power factor correction is performed.
摘要翻译：功率因数校正（PFC）控制器和方法使用有限状态机调节脉宽调制（PWM）切换控制信号的占空比。 PFC控制器具有目标电流发生器，其接收链路输出电压并产生与整流线路输入电压成比例的目标电流。 PFC控制器还包括输出双电平电流比较结果信号的比较器。响应于两电平电流比较结果信号的有限状态机产生开关控制信号，该开关控制信号具有调节用于控制开关的占空比，使得感测到的电流与整流线路输入电压近似成比例，使得功率进行因子校正。

34. 发明授权

US07706438B1 Circuits and methods for reducing noise and distortion in pulse width modulation systems 有权
标题翻译：用于降低脉冲宽度调制系统噪声和失真的电路和方法
公开(公告)号：US07706438B1
公开(公告)日：2010-04-27
申请号：US10767906
申请日：2004-01-29
申请人： Johann Guy Gaboriau , John Laurence Melanson , Lingli Zhang , Melvin L. Hagge
发明人： Johann Guy Gaboriau , John Laurence Melanson , Lingli Zhang , Melvin L. Hagge
IPC分类号： H03K7/08 , H03M5/08
CPC分类号： H03K7/08 , H03F3/2173
摘要： A pulse width modulation system including a pulse width modulation stage for generating a pulse width modulated signal in response to an input signal and an other pulse width modulation stage for generating an other pulse width modulated signal in response to an other input signal. Additional circuitry ensures that transitions of the pulse width modulated signal and the other pulse width modulated signal are spaced in time by a selected amount for small levels of the input signal.
摘要翻译：一种脉冲宽度调制系统，包括响应于输入信号产生脉宽调制信号的脉冲宽度调制级和用于响应于另一输入信号产生另一脉冲宽度调制信号的其它脉宽调制级。附加电路确保了脉冲宽度调制信号和另一个脉冲宽度调制信号的转换在输入信号的小电平上被时间间隔一定数量。

35. 发明授权

US07521951B1 Non-invasive, low pin count test circuits and methods utilizing emulated stress conditions 有权
标题翻译：非侵入性，低引脚数测试电路和利用模拟应力条件的方法
公开(公告)号：US07521951B1
公开(公告)日：2009-04-21
申请号：US11402508
申请日：2006-04-12
申请人： Murari Kejariwal , John Laurence Melanson , Ammisetti V. Prasad , Sherry Xiaohong Wu
发明人： Murari Kejariwal , John Laurence Melanson , Ammisetti V. Prasad , Sherry Xiaohong Wu
IPC分类号： G01R31/02
CPC分类号： G01R31/2884
摘要： A method of testing an internal block of an integrated circuit includes initiating a test mode and verifying an operation of the integrated circuit under a more stringent condition in the test mode as compared to a condition in another operating mode such that proper operation of the integrated circuit is assured in the another operating mode. A test signal is selectively output from a selected pin in the test mode indicative of the operation of the internal block, wherein the selected pin is utilized for exchanging another signal when the integrated circuit is in the another operating mode.
摘要翻译：一种测试集成电路的内部块的方法包括在与其他操作模式中的条件相比较下，在测试模式中在更严格的条件下启动测试模式并验证集成电路的操作，使得集成电路在另一个操作模式下保证。在指示内部块的操作的测试模式中，选择性地从所选择的引脚输出测试信号，其中当集成电路处于另一操作模式时，所选择的引脚用于交换另一个信号。

36. 发明授权

US07379834B1 Systems and methods for clock mode determination utilizing hysteresis 有权
标题翻译：使用滞后的时钟模式确定的系统和方法
公开(公告)号：US07379834B1
公开(公告)日：2008-05-27
申请号：US11135682
申请日：2005-05-24
申请人： Bruce Eliot Duewer , John Laurence Melanson
发明人： Bruce Eliot Duewer , John Laurence Melanson
IPC分类号： G01R35/00 , G01R19/00 , H03M1/00
CPC分类号： H04J3/0685 , G11B20/10222 , G11B20/14 , H03L7/00
摘要： A system for determining a data converter operating mode includes measurement circuitry operable to measure a master clock frequency of a master clock signal, the master clock frequency measurement biased by a past operating mode selection, and operable to measure a frequency ratio between a frequency of a data clock signal and the master clock frequency. A mapping system maps the measurements of the master clock frequency and the frequency ratio to an operating mode of the data converter. In an additional embodiment, the measurement circuitry biases the master clock frequency measurement based on a past master clock frequency measurement.
摘要翻译：一种用于确定数据转换器操作模式的系统包括测量电路，其可操作以测量主时钟信号的主时钟频率，主时钟频率测量由过去操作模式选择偏置，并且可操作以测量频率之间的频率比数据时钟信号和主时钟频率。映射系统将主时钟频率和频率比的测量结果映射到数据转换器的操作模式。在另外的实施例中，测量电路基于过去的主时钟频率测量来偏置主时钟频率测量。

37. 发明授权

US07167119B1 Delta-sigma modulators with double sampling input networks and systems using the same 有权
标题翻译：具有双采样输入网络的Delta-Σ调制器和使用它们的系统
公开(公告)号：US07167119B1
公开(公告)日：2007-01-23
申请号：US11312882
申请日：2005-12-20
申请人： Gong Tom Lei , Thuan Luong Nguyen , Daniel John Allen , John Laurence Melanson
发明人： Gong Tom Lei , Thuan Luong Nguyen , Daniel John Allen , John Laurence Melanson
IPC分类号： H03M3/00
CPC分类号： H03M3/342 , H03M3/424 , H03M3/452
摘要： A method of sampling an input signal in a delta-sigma modulator having at least an integrator stage and a feedback digital-to-analog converter (DAC) stage includes sampling an input signal at a sampling rate by alternately utilizing the two sampling capacitors during two sampling cycles such that the two sampling capacitors are each being utilized at half the rate of the sampling rate. Samples from the two sampling capacitors are summed at the sampling rate at an intermediate node with a feedback samples provided by the feedback DAC stage at the sampling rate to generate output samples which are output from integrator stage at the sampling rate.
摘要翻译：在至少具有积分器级和反馈数模转换器（DAC）级的Δ-Σ调制器中对输入信号进行采样的方法包括以两个采样电容器在两个采样电容器期间交替地利用采样率对输入信号进行采样采样周期使得两个采样电容器分别以采样率的一半的速率被使用。来自两个采样电容器的样本以中间节点处的采样率相加，其中反馈DAC级以采样率提供反馈样本，以产生以采样率从积分器级输出的输出采样。

38. 发明授权

US07142819B1 Circuits and methods for controlling switching noise in switched-mode circuits 有权
标题翻译：用于控制开关电路中开关噪声的电路和方法
公开(公告)号：US07142819B1
公开(公告)日：2006-11-28
申请号：US11233961
申请日：2005-09-23
申请人： Chang Yong Kang , John Laurence Melanson
发明人： Chang Yong Kang , John Laurence Melanson
IPC分类号： H04B1/00
CPC分类号： H04B15/04 , H03F3/2173 , H04B2215/065 , H04B2215/069
摘要： A method of controlling noise in a pulse width modulation circuit includes varying a sample frequency and a range of information levels, wherein each sample within a data sample stream at the sample frequency represents a level within the range of information levels, to shift in frequency noise generated at the sample frequency during encoding of the data sample stream into pulse width modulated patterns.
摘要翻译：一种控制脉冲宽度调制电路中的噪声的方法包括改变采样频率和信号电平范围，其中采样频率下数据采样流内的每个采样信号表示信号电平范围内的电平，以使频率噪声偏移在将数据采样流编码成脉冲宽度调制图案期间以采样频率生成。

39. 发明授权

US07110460B1 Delta-sigma modulators with integral digital low-pass filtering 有权
标题翻译：具有整数数字低通滤波的Delta-Σ调制器
公开(公告)号：US07110460B1
公开(公告)日：2006-09-19
申请号：US10914917
申请日：2004-08-10
申请人： John Laurence Melanson , Heling Yi
发明人： John Laurence Melanson , Heling Yi
IPC分类号： H04B14/06 , H03M3/02
CPC分类号： H03M7/304 , H03M7/3026 , H03M7/3028
摘要： A delta-sigma modulator of an order of at least three having a signal transfer function defining a signal low-pass response, the signal transfer function has a numerator and a denominator, the denominator defined by a product of first and second functions defining respective first and second pole sets such that a roll-off frequency of a low-pass response defined by the first pole set is at least twice a roll-off frequency of a low-pass response defined by the second pole set. The delta-sigma modulator also has a noise transfer function defining a noise high-pass response, the noise transfer function having a numerator and a denominator, the denominator defined by the product of the first and second functions. The numerator of the noise transfer function differs from the numerator of the signal transfer function and characterizes the noise high-pass response.
摘要翻译：具有定义信号低通响应的信号传递函数的具有至少三个数量级的Δ-Σ调制器，所述信号传递函数具有分子和分母，所述分母由第一和第二函数的乘积定义，所述第一和第二函数定义相应的第一以及第二极点组，使得由第一极点集限定的低通响应的滚降频率为由第二极点限定的低通响应的滚降频率的至少两倍。 Δ-Σ调制器还具有定义噪声高通响应的噪声传递函数，噪声传递函数具有分子和分母，分母由第一和第二函数的乘积定义。噪声传递函数的分子与信号传递函数的分子不同，并表征噪声高通响应。

40. 发明授权

US06933871B2 Feedback steering delta-sigma modulators and systems using the same 有权
标题翻译：反馈转向Δ-Σ调制器和使用它的系统
公开(公告)号：US06933871B2
公开(公告)日：2005-08-23
申请号：US10379742
申请日：2003-03-05
申请人： John Laurence Melanson , Xiaofan Fei , Johann G. Gaboriau
发明人： John Laurence Melanson , Xiaofan Fei , Johann G. Gaboriau
IPC分类号： H03M20060101 , H03M3/00 , H03M7/32 , H03M7/34 , H03M7/36 , H03M7/38
CPC分类号： H03M7/3006 , H03M7/3011 , H03M7/3026 , H03M7/3033 , H03M7/3037
摘要： A digital to analog converter including an input for receiving an input signal, a ramp generator, and a delta-sigma modulator responsive to the input signal and an output of the ramp generator. An order of a noise shaping transfer function of the delta-sigma modulator is response to a level of the output of the ramp generator.
摘要翻译：数模转换器，包括用于接收输入信号的输入端，斜坡发生器和响应于输入信号和斜坡发生器输出的Δ-Σ调制器。 Δ-Σ调制器的噪声整形传递函数的顺序响应于斜坡发生器的输出电平。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式