公开(公告)号：US08779777B2

公开(公告)日：2014-07-15

申请号：US13111636

申请日：2011-05-19

Applicant: Frank Irmer ,  Bernhard Engl

Inventor： Frank Irmer ,  Bernhard Engl

IPC: G01R35/00 ,  G01R27/02 ,  G01R1/02

CPC classification number: G01R35/00 ,  G01R1/02 ,  G01R19/0092 ,  G01R27/02 ,  G01R35/005

Abstract: A current sense resistor circuit may include a primary current sense resistor that drifts with age. A secondary current sense resistor may drift with age in substantial unison with the primary current sense resistor. A calibration resistor may not drift with age in substantial unison with the primary current sense resistor. A compensation circuit may compensate for aging drift in the resistance of the primary current sense resistor based on a comparison of the calibration resistor with the secondary current sense resistor. The secondary current sense resistor may be in parallel with the primary current sense resistor, except when the compensation circuit is comparing the calibration resistor with the secondary current sense resistor.

Abstract translation: 电流检测电阻器电路可以包括随着年龄漂移的初级电流检测电阻器。 次级电流检测电阻器可随时间漂移而与初级电流检测电阻器基本一致。 校准电阻器可能不会与初级电流检测电阻器基本一致地随年龄漂移。 补偿电路可以基于校准电阻器与次级电流检测电阻器的比较来补偿初级电流检测电阻器的电阻中的老化漂移。 次级电流检测电阻可以与初级电流检测电阻并联，除非补偿电路正在比较校准电阻和次级电流检测电阻。

公开(公告)号：US20140191768A1

公开(公告)日：2014-07-10

申请号：US13734581

申请日：2013-01-04

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Bernhard Helmut ENGL

IPC: G01R35/00 ,  G01R27/14

CPC classification number: G01R35/005 ,  G01R1/203 ,  G01R17/105 ,  G01R27/14 ,  G01R27/16

Abstract: Method and system for measuring the resistance of a resistive structure having at least three nodes. A first calibration signal is determined by measuring a voltage at an output of the resistance structure when no calibration current is injected into a third node between the first and second nodes of the structure. A calibration current is then injected into the third node and a second calibration signal is determined. The absolute value of the difference between the first calibration signal and the second calibration signal is determined, the absolute value being proportional to a product of the resistance of the resistive structure and the calibration current.

Abstract translation: 用于测量具有至少三个节点的电阻结构的电阻的方法和系统。 当没有校准电流注入结构的第一和第二节点之间的第三节点时，通过测量电阻结构的输出端的电压来确定第一校准信号。 然后将校准电流注入到第三节点中，并且确定第二校准信号。 确定第一校准信号和第二校准信号之间的差的绝对值，绝对值与电阻结构的电阻与校准电流的乘积成比例。

公开(公告)号：US20140191741A1

公开(公告)日：2014-07-10

申请号：US13734485

申请日：2013-01-04

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Samuel H. NORK

IPC: G05F1/62

CPC classification number: G05F1/62 ,  G01R29/24 ,  H02J7/0078 ,  H02M3/156 ,  H02M3/1582 ,  H02M2001/0032

Abstract: A power supply system includes a regulator circuit responsive to an input signal at the input node for producing an output signal at the output node at a desired level. The regulator circuit has a controller, an inductive element and a first switch coupled to the inductor element and controlled by the controller to produce the output signal. Also, the power supply system includes a Coulomb counter for producing a Coulomb count signal proportional to the number of Coulombs passing from the input node to the output node. The Coulomb counter is enabled by an enabling signal representing a predetermined time period, for determining the number of Coulombs passing from the input node to the output node during that predetermined time period.

Abstract translation: 电源系统包括响应于输入节点处的输入信号的调节器电路，用于在输出节点处以期望的水平产生输出信号。 调节器电路具有控制器，电感元件和耦合到电感器元件并由控制器控制以产生输出信号的第一开关。 此外，电源系统包括用于产生与从输入节点传送到输出节点的库仑数成正比的库仑计数信号的库仑计数器。 库仑计数器由表示预定时间段的使能信号使能，用于确定在该预定时间段期间从输入节点传送到输出节点的库仑数。

公开(公告)号：US08742848B1

公开(公告)日：2014-06-03

申请号：US13829567

申请日：2013-03-14

Applicant: Linear Technology Corporation

Inventor： Thomas Lloyd Botker

IPC: H03F3/45

CPC classification number: H03F3/4508 ,  H03F3/45618 ,  H03F2200/261 ,  H03F2203/45356

Abstract: A method of fabricating an instrumentation amplifier to have an improved common mode rejection ratio (CMRR) vs. frequency initially trims resistors in the input amplifiers of the instrumentation amplifier during a DC test, where the inputs are shorted and a DC voltage is applied, so that the output of the amplifier is approximately zero. This will normally cause the transconductances of the two input amplifiers to be different. Thus, the AC CMRR will degrade with frequency. Trimmable capacitors are provided in the input section and are trimmed during a common mode AC test to cause the output voltage to be minimized during the AC test. This causes the two input amplifiers to have the same bandwidth and gm/C ratio.

Abstract translation: 在直流测试期间，在输入短路和施加直流电压的情况下，制造具有改进的共模抑制比（CMRR）与频率的仪器放大器的方法最初对仪表放大器的输入放大器中的电阻器进行微调，因此 放大器的输出大约为零。 这通常会导致两个输入放大器的跨导不同。 因此，AC CMRR将随着频率而降级。 在输入部分提供了可调电容器，并在共模交流测试期间进行了修整，以在AC测试期间使输出电压最小化。 这使得两个输入放大器具有相同的带宽和gm / C比。

公开(公告)号：US20140139198A1

公开(公告)日：2014-05-22

申请号：US13764045

申请日：2013-02-11

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Gregory Manlove ,  Yi Ding Gu ,  Jian Li

IPC: G05F1/10

CPC classification number: G05F1/10 ,  G05F1/562 ,  H02M1/32 ,  H02M3/142 ,  H02M3/156 ,  H02M3/158 ,  H02M2001/0019 ,  H02M2001/0025

Abstract: A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.

Abstract translation: 开关稳压器电路包括连接在调节器电路的控制回路中的偏移电路，响应于指示迫在眉睫的负载电流步长的信号，调节调节器电路之前的当前步骤的功率开关的占空比 响应于由于当前步骤而导致的输出电压的变化。 在一个实施例中，负载控制器在负载电流步长之前不久就发出数字信号。 数字信号被解码并转换成调节器的反馈控制环路中的模拟偏移信号，以立即调节开关的占空比，而与输出电压电平无关。 通过适当的偏移定时，输出电压纹波大大降低。 电流偏移也可以用于响应于请求电压阶跃的外部信号快速地改变输出电压。

公开(公告)号：US20140132431A1

公开(公告)日：2014-05-15

申请号：US14162567

申请日：2014-01-23

Applicant: LINEAR TECHNOLOGY CORPORATION

Inventor： Jesper STEENSGAARD-MADSEN

IPC: H03M1/20

CPC classification number: H03M1/201 ,  H03M1/0641 ,  H03M1/0668 ,  H03M1/462 ,  H03M1/468

Abstract: An analog-to-digital converter (ADC) system and method. The ADC system in accord with one embodiment includes a sampling digital-to-analog converter configured to sample a combination of an analog signal value and an analog dither value, and a control circuit comprising a mismatch-shaping encoder. The control circuit is configured to sequentially apply a plurality of digital codes to the sampling digital-to-analog converter during an analog-to-digital conversion operation to derive a digital code representing the combination of the analog signal value and the analog dither value. Several embodiments are presented.

Abstract translation: 一种模数转换器（ADC）系统和方法。 根据一个实施例的ADC系统包括被配置为对模拟信号值和模拟抖动值的组合进行采样的采样数模转换器，以及包括失配整形编码器的控制电路。 控制电路被配置为在模数转换操作期间将多个数字代码顺序地应用于采样数模转换器，以导出表示模拟信号值和模拟抖动值的组合的数字代码。 呈现了几个实施例。

公开(公告)号：US08692481B2

公开(公告)日：2014-04-08

申请号：US12332299

申请日：2008-12-10

Applicant: Michael George Negrete ,  Wei Gu ,  Zhen Li

Inventor： Michael George Negrete ,  Wei Gu ,  Zhen Li

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0845

Abstract: A flyback controller generates a switching signal for controlling delivery of current into a primary winding of a transformer in a flyback converter. The controller may include an output current monitoring circuit configured to generate a signal representative of an average output current in a secondary winding of the transformer based on a peak input current in the primary winding and a duty cycle of current in the secondary winding. The flyback controller may generate a switching signal that causes a chopped AC voltage from a dimmer control to be converted by the flyback converter into an average output current from a secondary winding of the transformer that is DC isolated from the chopped AC voltage and that varies as a function of the setting of the dimmer control. The flyback controller may not utilize a signal from an opto-isolator.

Abstract translation: 回扫控制器产生用于控制在回扫转换器中的变压器的初级绕组中的电流传递的开关信号。 控制器可以包括输出电流监测电路，其被配置为基于初级绕组中的峰值输入电流和次级绕组中的电流占空比来产生代表变压器的次级绕组中的平均输出电流的信号。 反激控制器可以产生切换信号，其使得来自调光器控制的斩波AC电压由反激式转换器转换成来自变压器的次级绕组的平均输出电流，其与斩波的交流电压隔离，并且变化为 调光控制功能。 回扫控制器可能不使用来自光隔离器的信号。

公开(公告)号：US08664920B2

公开(公告)日：2014-03-04

申请号：US13594684

申请日：2012-08-24

Applicant: Jonathan Wayde Celani ,  Brian James Shaffer ,  Trevor W. Barcelo

Inventor： Jonathan Wayde Celani ,  Brian James Shaffer ,  Trevor W. Barcelo

IPC: H02J7/04 ,  H03K5/22 ,  H03K17/14 ,  H01L35/00

CPC classification number: H02J7/0083 ,  H02J3/385 ,  H02J7/0091 ,  H02J7/35 ,  H02M1/32 ,  H02M3/156 ,  H02M2001/0022 ,  H02M2001/327 ,  Y02E10/58

Abstract: An apparatus and method for charging a battery includes a battery to be charged, a power delivery path configured for delivering power to the battery, and an integrated switching battery charger configured for charging a battery by delivering output power to the battery via the power delivery path based on input power from an input power source. The integrated switching battery charger includes an output voltage regulation loop and an input voltage regulation loop, both of which are configured to control the output current flowing out of the integrated switching battery charger to the battery. The input or output voltage regulation loops are further enhanced by adding a current source which is proportional to absolute temperature from the regulated voltage to the control voltage for the purpose of either regulating peak power from the source or to maximize energy storage in the battery as a function of temperature.

Abstract translation: 一种用于对电池充电的装置和方法包括：要充电的电池，被配置为将电力输送到电池的电力输送路径;以及集成开关电池充电器，其被配置为通过经由电力输送路径向电池输出电力来对电池充电 基于来自输入电源的输入功率。 集成开关电池充电器包括输出电压调节环路和输入电压调节环路，两者都被配置为控制从集成开关电池充电器流出到电池的输出电流。 输入或输出电压调节环路通过将源自稳压器的绝对温度成比例的电流源与控制电压相加来进一步增强，以便调节来自电源的峰值功率或使电池中的能量存储最大化 温度函数

公开(公告)号：US20140002043A1

公开(公告)日：2014-01-02

申请号：US13536596

申请日：2012-06-28

Applicant: Jian Li ,  Jindong Henry Zhang

Inventor： Jian Li ,  Jindong Henry Zhang

IPC: G05F1/10

CPC classification number: H02M3/156

Abstract: A method for automatically compensating a voltage regulator initially disconnects the error amplifier and compensation network from the feedback loop. A DC bias voltage is applied to the feedback loop to cause the regulator's output voltage to be at 90% of its nominal value. An AC perturbation signal is then added to the DC bias voltage to cause the output voltage to have a ripple at a frequency of the AC signal. The gain of the feedback loop and the phase difference between the AC signal and the ripple is then measured. The measured values are then used to automatically adjust operating characteristics of the error amplifier and the compensation network such that, when these components are connected back in the feedback loop during normal operation, the feedback loop has the desired gain and phase margin at the frequency of the AC signal, such as the loop's unity gain frequency.

Abstract translation: 用于自动补偿电压调节器的方法最初将误差放大器和补偿网络与反馈回路断开连接。 直流偏置电压施加到反馈回路，使稳压器的输出电压达到其标称值的90％。 然后将AC扰动信号添加到DC偏置电压，以使输出电压在AC信号的频率处具有纹波。 然后测量反馈回路的增益和交流信号与纹波之间的相位差。 然后测量值用于自动调整误差放大器和补偿网络的工作特性，使得当这些组件在正常操作期间连接回反馈环路时，反馈回路具有期望的增益和相位裕度，频率为 交流信号，如循环的单位增益频率。

公开(公告)号：US08593839B2

公开(公告)日：2013-11-26

申请号：US12882806

申请日：2010-09-15

Applicant: Charles Edward Hawkes

Inventor： Charles Edward Hawkes

IPC: G05F5/04

CPC classification number: H02M3/33507 ,  H02M2001/0022

Abstract: A novel system and methodology for providing a volt-second clamp. A DC/DC conversion system configured for producing an output voltage in response to an input voltage has a transformer with a primary winding responsive to the input voltage and a secondary winding for producing the output voltage. The conversion system has a power switch coupled to the primary winding of the transformer and controlled with a converter control signal, such as a PWM control signal. The power switch is further controlled by a comparator that compares an input value supplied to its input with a variable reference value so as to prevent magnetic flux density of the transformer from increasing to an undesired level. The input value of the comparator is produced by a comparator input circuit as a function of the input voltage and an on-time of the power switch. A reference circuit produces the reference value that varies as a function of the input voltage.

Abstract translation: 一种用于提供伏秒钳位的新型系统和方法。 配置为响应于输入电压产生输出电压的DC / DC转换系统具有响应于输入电压的初级绕组的变压器和用于产生输出电压的次级绕组。 转换系统具有耦合到变压器的初级绕组的功率开关，并通过诸如PWM控制信号的转换器控制信号来控制。 电源开关进一步由比较器控制，该比较器将提供给其输入的输入值与可变参考值进行比较，以防止变压器的磁通密度增加到不期望的水平。 比较器的输入值由比较器输入电路作为输入电压和电源开关导通时间的函数产生。 参考电路产生随输入电压变化的参考值。