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41. 发明公开

EP2639951A2 Flyback converter 有权转让
标题翻译：反激转换器
公开(公告)号：EP2639951A2
公开(公告)日：2013-09-18
申请号：EP13158838.6
申请日：2013-03-12
申请人： Linear Technology Corporation
发明人： Morris, John D. , Negrete, Michael G. , Chen, Min
IPC分类号： H02M3/22
CPC分类号： H02M3/335 , H02M2001/0032 , Y02B70/16
摘要： In a flyback converter (20 using primary side sensing to sense the output voltage for regulation feedback a comparator (36) on the primary side detects whether the output voltage has exceeded a predetermined regulated voltage by a first threshold to detect an over-voltage condition, resulting from a current generated by the converter exceeding the load current. Triggering of the comparator causes the converter to enter a non-switching sleep mode, whereby the output voltage droops over a period of time. When the output voltage has drooped below the predetermined regulated voltage by a second threshold, a synchronous rectifier is controlled (28) to turn on, then off, to generate a pulse in the primary winding. Upon detection of the pulse, the sleep mode is terminated, and normal operation resumes until a regulated voltage is achieved or until the first threshold is again exceeded by the output voltage.

42. 发明公开

EP2621069A2 Flyback converter with primary side voltage sensing and overvoltage protection during low load operation 有权转让
标题翻译：与初级侧输出电压感测回扫和在低负荷运行浪涌保护
公开(公告)号：EP2621069A2
公开(公告)日：2013-07-31
申请号：EP13150881.4
申请日：2013-01-10
申请人： Linear Technology Corporation
发明人： Negrete, Michael G. , Chen, Min , Morris, John D.
IPC分类号： H02M3/335 , H02M1/32
CPC分类号： H02M1/32 , H02M3/33584 , H02M3/33592 , H02M2001/0032 , Y02B70/1475 , Y02B70/16
摘要： A flyback converter (20) uses primary side sensing to sense the output voltage for regulating feedback. The flyback converter comprises a transformer with a primary winding (L1) and a secondary winding (L2), a first transistor (M1) coupled to the primary winding for conducting a current through the primary winding when the first transistor is on a second transistor (M2) for conducting a current through the secondary winding when the second transistor is on a regulator (14) coupled to the first transistor for controlling a duty cycle of the first transistor to regulate an output voltage of the converter, the regulator being configured to control the first transistor to have a minimum duty cycle, an output capacitor (C1) coupled to an output terminal of the converter, a synchronous rectifier controller (24) coupled to the second transistor for controlling the second transistor to be on or off, a comparator (42) having one input coupled to receive a voltage corresponding to the output voltage of the converter and having another input connected to a reference voltage representing a threshold voltage exceeding a regulated voltage of the converter, wherein triggering of the comparator signifies an over-voltage condition, an output of the comparator being coupled so as to control the synchronous rectifier controller to turn the second transistor on for an interval to conduct a reverse current through the secondary winding, upon an over-voltage condition being detected, to reduce the output voltage of the converter to mitigate the over-voltage condition, and a diode (D1) coupled to the primary winding to conduct a current through the primary winding after the interval without turning on the first transistor, such that power is transferred from a secondary side of the transformer to the power source while mitigating the over-voltage condition.

43. 发明授权

EP2299578B1 Dc/dc converter having a fast and accurate average current limit 有权转让
标题翻译： DC-DC转换器的平均电流的快速而精确的极限
公开(公告)号：EP2299578B1
公开(公告)日：2013-07-31
申请号：EP10009840.9
申请日：2010-09-17
申请人： Linear Technology Corporation
发明人： Hawkes, Charles Edward
IPC分类号： H02M3/156
CPC分类号： H02M3/156

44. 发明公开

EP2592425A1 Anemometer detecting thermal time constant of sensor 有权转让
标题翻译：风速计Mitteln zur Detektion der thermischen Zeitkonstante eines传感器
公开(公告)号：EP2592425A1
公开(公告)日：2013-05-15
申请号：EP12275154.8
申请日：2012-09-28
申请人： Linear Technology Corporation
发明人： Heath, Jeffery Lynn , Kleeburg, Harry Joseph , Stewart, Heath Dixon
IPC分类号： G01P5/10 , G01F1/698
CPC分类号： G01P5/02 , G01F1/688 , G01F1/698 , G01P1/00 , G01P5/10
摘要： In an anemometer (12) for analyzing fluid a transistor sensor (46) is heated by applying power to cause its base-emitter junction to rise from an ambient first temperature to a second temperature. The power is removed, and the Vbe is measured at intervals as the junction cools. The Vbe equates to a temperature of the junction. The temperature exponentially decreases, and the time constant of the decay corresponds to the fluid flow velocity. A best fit curve analysis is performed on the temperature decay curve, and the time constant of the exponential decay is derived by a data processor. A transfer function correlates the time constant to the fluid flow velocity. The transistor is thermally coupled to a metal rod heat sink (22) extending from package (18), and the characteristics of the rod are controlled to adjust the performance of the anemometer.
摘要翻译：在用于分析流体的风速计（12）中，通过施加功率来加热晶体管传感器（46），以使其基极 - 发射极结从环境第一温度升高到第二温度。功率被去除，并且在接头冷却时间隔测量Vbe。 Vbe等于交界处的温度。温度指数下降，衰减的时间常数对应于流体流速。对温度衰减曲线进行最佳拟合曲线分析，数据处理器得出指数衰减的时间常数。传递函数将时间常数与流体流速相关联。晶体管热耦合到从封装（18）延伸的金属棒散热器（22），并且控制棒的特性以调节风速计的性能。

45. 发明公开

EP2590329A1 Systems and methods for randomizing component mismatch in an adc 有权转让
标题翻译：欧洲模拟数字漫画家系统与Verfahren zur Randomisierung von Komponentenfehlanpassung
公开(公告)号：EP2590329A1
公开(公告)日：2013-05-08
申请号：EP12007591.6
申请日：2012-11-07
申请人： Linear Technology Corporation
发明人： Thomas, David M.
IPC分类号： H03M1/06
CPC分类号： H04B17/102 , H03M1/0673 , H03M1/74
摘要： Circuits and methods for converting a signal from analog to digital. A random number generator (302) provides a random number to a memory (308). The memory (308) is preconfigured to include codes of predetermined digital to analog, DAC, configurations that provide the maximum amount of DAC gradient suppression. At least one Flash reference generation DAC, FRGD (310), has an input coupled to the memory unit (308) and an output providing a reference voltage level for its respective Flash comparator (110). The Flash comparators (110) compare the analog input signal (VIN) to their respective reference voltage and provide a digital output signal based on the comparison.
摘要翻译：用于将信号从模拟转换成数字的电路和方法。随机数生成器（302）向存储器（308）提供随机数。存储器（308）被预配置为包括提供DAC梯度抑制的最大量的预定数字到模拟DAC的配置的代码。至少一个闪存参考产生DAC FRGD（310）具有耦合到存储器单元（308）的输入和为其各自的闪存比较器（110）提供参考电压电平的输出。闪存比较器（110）将模拟输入信号（VIN）与其各自的参考电压进行比较，并根据比较提供数字输出信号。

46. 发明授权

EP2060059B1 PROGRAMMABLE CONSTANT POWER FOLDBACK 有权转让
标题翻译：可程式恒温恒湿电流折返
公开(公告)号：EP2060059B1
公开(公告)日：2013-04-24
申请号：EP07811698.5
申请日：2007-09-07
申请人： Linear Technology Corporation
发明人： HEATH, Jeffrey, Lynn
IPC分类号： H04L12/10 , H03K3/00 , G05F1/573 , G06F1/26
CPC分类号： H04L12/10 , G05F1/5735

47. 发明公开

EP2549636A2 Light load regulator for isolated flyback converter 审中-公开
标题翻译： Schwachlastreglerfüreinen isolierten Sperrwandler
公开(公告)号：EP2549636A2
公开(公告)日：2013-01-23
申请号：EP12006349.0
申请日：2007-04-20
申请人： Linear Technology Corporation
发明人： NG, David, R. , Negrete, Michael, G.
IPC分类号： H02M3/335
CPC分类号： H02M3/33523 , H02M3/33507
摘要： The invention relates to a regulator for a flyback converter having a transformer with a primary winding and a secondary winding and a switching circuit for controllably delivering energy into the primary winding in response to pulses, the regulator comprising a pulse generator configured to initiate the pulses approximately when current through the secondary winding ceases during various different heavy loads on the flyback converter and to increase at least one off time and at least one period of the pulses and not to initiate the pulses approximately when current through the secondary winding ceases during various different lighter loads on the flyback converter.
摘要翻译：本发明涉及一种用于具有初级绕组和次级绕组的变压器的反激式转换器的调节器，以及用于响应于脉冲将能量可控地传递到初级绕组的开关电路，该调节器包括脉冲发生器，该脉冲发生器被配置为大致启动脉冲当通过次级绕组的电流在反激式转换器上的各种不同的重负载期间停止，并且在各种不同的较轻的打火机期间停止增加至少一个关闭时间和脉冲的至少一个周期，而不是大量地启动脉冲反激式转换器上的负载。

48. 发明公开

EP2546966A2 Robust current control for step-down converter 有权转让
标题翻译： Robuste Stromreglungfüreinen Tiefsetzsteller
公开(公告)号：EP2546966A2
公开(公告)日：2013-01-16
申请号：EP12175986.4
申请日：2012-07-11
申请人： Linear Technology Corporation
发明人： Zhang, Jindong
IPC分类号： H02M3/158 , H02M1/14
CPC分类号： H02M3/1588 , H02M1/14 , H02M2001/0009 , Y02B70/1466
摘要： In a current mode controlled switching power supply, current through an inductor (L1) is sensed to determine when to turn off or on the switching transistors (86, 88), the inductor current (IL) having a higher frequency AC component and a lower frequency DC component. The AC current feedback path (AC PATH), sensing the ramping ripple current, is separate from the DC current path (DC PATH), sensing the lower frequency average current. Separating the current sensing paths allows the signal to noise ratio of the AC sense signal (Vsen(ac)) to be increased and allows the switching noise to be filtered from the DC sense signal (K*Vsen(dc)). The gain (K) of the DC sense signal is adjusted so that the DC sense signal (K*Vsen(dc)) has the proper proportion to the AC sense signal (Vsen(ac)). The AC sense signal (Vsen(ac)) and the DC sense signal (K*Vsen(dc)) are combined by a summing circuit (72). The composite sense signal (Sum) is applied to a PWM comparator (50) to control the duty cycle of the switch.
摘要翻译：在电流模式控制的开关电源中，感测通过电感器（L1）的电流以确定何时关断或开关晶体管（86,88），电感器电流（IL）具有较高频率的AC分量和较低的频率直流分量。检测斜坡纹波电流的交流电流反馈路径（AC PATH）与直流电流路径（DC PATH）分离，感测较低的频率平均电流。分离电流感测路径允许增加AC感测信号（Vsen（ac））的信噪比，并允许从DC感测信号（K * Vsen（dc））滤波开关噪声。调整DC感测信号的增益（K），使得DC感测信号（K * Vsen（dc））与AC感测信号（Vsen（ac））成正比。 AC感测信号（Vsen（ac））和DC感测信号（K * Vsen（dc））通过求和电路（72）组合。复合感测信号（Sum）被施加到PWM比较器（50）以控制开关的占空比。

49. 发明授权

EP1931029B1 Sawtooth oscillator having controlled endpoints and methodology therefor 失效转让
标题翻译：具有受控端点及其方法锯齿波振荡器
公开(公告)号：EP1931029B1
公开(公告)日：2013-01-16
申请号：EP07121448.0
申请日：2007-11-23
申请人： Linear Technology Corporation
发明人： Celani, Jonathan
IPC分类号： H03K4/501
CPC分类号： H03K4/501

50. 发明公开

EP2539995A2 CHARGE PUMP WITH GLITCHLESS TERMINAL CURRENTS 有权转让
标题翻译： SYSTEMPUMPE MITSTÖRUNGSFREIENKLEMMENSTRÖMEN
公开(公告)号：EP2539995A2
公开(公告)日：2013-01-02
申请号：EP11707522.6
申请日：2011-02-22
申请人： Linear Technology Corporation
发明人： SOUSA, Joseph , THOMAS, Andrew
IPC分类号： H02M3/07
CPC分类号： H02M3/07 , H02M1/15
摘要： Circuits and methods for maintaining a substantially constant input and output current for a charge pump circuit are provided which reduce current variation during switching intervals. The charge pump circuitry of the present invention maintains a current flow path from a current source to the charge pump output which minimizes or eliminates spikes normally associated with the switching intervals
摘要翻译：提供了用于为电荷泵电路保持基本恒定的输入和输出电流的电路和方法，其减少了切换间隔期间的电流变化。本发明的电荷泵电路维持从电流源到电荷泵输出的电流流动路径，其最小化或消除通常与切换间隔相关联的尖峰。

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