Clamp circuits for power converters
    31.
    发明授权
    Clamp circuits for power converters 有权
    电源转换器的钳位电路

    公开(公告)号:US08966294B2

    公开(公告)日:2015-02-24

    申请号:US13389198

    申请日:2011-08-12

    摘要: A power converter comprises an input port configured to receive a source of power, an output port configured to provide output power, and a bridge circuit coupled to the input port. The bridge circuit comprises a first switch coupled in series with a second switch, and a third switch coupled in series with a fourth switch. A first clamp rectifier is coupled in series with a second clamp rectifier, and the first and second clamp rectifiers are coupled in parallel with the first and second switches. A first clamp capacitor is coupled between the first and second clamp rectifiers, with the first clamp capacitor operative to reduce power loss in the first and second clamp rectifiers. A first resonant inductor is coupled between the first and second switches. The power converter also includes a transformer operatively coupled to the bridge circuit, with the transformer comprising a primary winding and at least one secondary winding. A current rectifying circuit is operatively coupled to the secondary winding of the transformer and the output port.

    摘要翻译: 电力转换器包括被配置为接收电源的输入端口,被配置为提供输出功率的输出端口以及耦合到输入端口的桥式电路。 桥接电路包括与第二开关串联耦合的第一开关和与第四开关串联耦合的第三开关。 第一钳位整流器与第二钳位整流器串联耦合,并且第一和第二钳位整流器与第一和第二开关并联耦合。 第一钳位电容器耦合在第一和第二钳位整流器之间,第一钳位电容器用于减少第一和第二钳位整流器中的功率损耗。 第一谐振电感器耦合在第一和第二开关之间。 功率转换器还包括可操作地耦合到桥式电路的变压器,变压器包括初级绕组和至少一个次级绕组。 电流整流电路可操作地耦合到变压器的次级绕组和输出端口。

    Power supply with a magnetically uncoupled phase and an odd number of magnetically coupled phases, and control for a power supply with magnetically coupled and magnetically uncoupled phases
    32.
    发明授权
    Power supply with a magnetically uncoupled phase and an odd number of magnetically coupled phases, and control for a power supply with magnetically coupled and magnetically uncoupled phases 有权
    具有磁耦合相和奇数个磁耦合相的电源,以及具有磁耦合和磁耦合相的电源的控制

    公开(公告)号:US08963521B2

    公开(公告)日:2015-02-24

    申请号:US13852973

    申请日:2013-03-28

    IPC分类号: H02M3/158 G05F1/46 H02M1/00

    摘要: An embodiment of a power supply includes an input node operable to receive an input voltage, an output node operable to provide a regulated output voltage, an odd number of magnetically coupled phase paths each coupled between the input and output nodes, and a first magnetically uncoupled phase path coupled between the input and output nodes. Such a power supply may improve its efficiency by activating different combinations of the coupled and uncoupled phase paths depending on the load conditions. For example, the power supply may activate only an uncoupled phase path during light-load conditions, may activate only coupled phase paths during moderate-load conditions, and may activate both coupled and uncoupled phase paths during heavy-load conditions and during a step-up load transient.

    摘要翻译: 电源的实施例包括可操作以接收输入电压的输入节点,可操作以提供调节输出电压的输出节点,每个耦合在输入和输出节点之间的奇数个磁耦合相位路径,以及第一磁耦合 相位路径耦合在输入和输出节点之间。 这样的电源可以通过根据负载条件激活耦合和非耦合相位路径的不同组合来提高其效率。 例如,在轻负载状态期间,电源可以仅激活非耦合相位路径,在中等负载状态下仅激活耦合的相位路径,并且可以在重负载状态期间和在步进电压期间激活耦合和非耦合相位路径, up负载瞬变。

    Motion and simple gesture detection using multiple photodetector segments
    34.
    发明授权
    Motion and simple gesture detection using multiple photodetector segments 有权
    运动和简单的手势检测使用多个光电检测器段

    公开(公告)号:US08907264B2

    公开(公告)日:2014-12-09

    申请号:US13523777

    申请日:2012-06-14

    申请人: Allen M. Earman

    发明人: Allen M. Earman

    IPC分类号: G06M7/00

    摘要: An optoelectronics apparatus selectively drives a light source, and includes four electrically isolated photodetector (PD) segments that detect light that has reflected off an object. Each of the four PD segments produces a corresponding signal, referred to as signals A, B, C and D, indicative of the light detected by the respective PD segment. Circuitry is used to produce a first motion signal indicative of a sum of the signals A plus B minus a sum of the signals C plus D, i.e., the first motion signal is indicative of (A+B)−(C+D). Further circuitry produces a second motion signal indicative of (B+C)−(A+D). Additional circuitry produces a signal and/or data that is indicative of a direction and/or rate of motion of an object, in dependence on the first and second motion signals.

    摘要翻译: 光电子装置选择性地驱动光源,并且包括四个电隔离光电检测器(PD)段,其检测已经从物体反射的光。 四个PD段中的每一个产生相应的信号,称为信号A,B,C和D,指示由相应的PD段检测到的光。 电路用于产生指示信号A加B和总和的第一运动信号减去信号C plus D的和,即第一运动信号表示(A + B) - (C + D)。 另外的电路产生指示(B + C) - (A + D)的第二运动信号。 附加电路根据第一和第二运动信号产生指示对象的方向和/或运动速率的信号和/或数据。

    Systems and methods for controlling scanning mirrors for a display device
    35.
    发明授权
    Systems and methods for controlling scanning mirrors for a display device 有权
    用于控制显示装置的扫描镜的系统和方法

    公开(公告)号:US08902346B2

    公开(公告)日:2014-12-02

    申请号:US13763455

    申请日:2013-02-08

    发明人: Gwilym Luff

    IPC分类号: H04N5/222 H04N5/74 G02B26/10

    CPC分类号: H04N5/7416 G02B26/101

    摘要: Certain embodiments described herein relate to a scanning controller configured produce a horizontal (H) and vertical (V) scanning control signal that is used to control a bi-axial scanning mirror of a scanning laser projector device, a system including such a scanning controller, and a method for generating such an H and V scanning control signal. In an embodiment, the H and V scanning control signal includes H scanning frequency content that is used to control a H scanning frequency of the bi-axial scanning mirror, and V scanning frequency content that is used to control a V scanning frequency of the bi-axial scanning mirror. To avoid cross talk, the scanning controller is configured to produce the H and V scanning control signal such that the H scanning frequency content has a null at DC, and the V scanning frequency content has a null at the H scanning frequency.

    摘要翻译: 本文所描述的某些实施例涉及构成的扫描控制器产生用于控制扫描激光投射设备的双轴扫描镜的水平(H)和垂直(V)扫描控制信号,包括这种扫描控制器的系统, 以及用于产生这样的H和V扫描控制信号的方法。 在一个实施例中,H和V扫描控制信号包括用于控制双轴扫描镜的H扫描频率的H扫描频率内容,以及用于控制双轴扫描镜的V扫描频率的V扫描频率内容 同轴扫描镜。 为了避免串扰,扫描控制器被配置为产生H和V扫描控制信号,使得H扫描频率内容在DC处为零,并且V扫描频率内容在H扫描频率处为零。

    Cable equalization and monitoring for degradation and potential tampering
    36.
    发明授权
    Cable equalization and monitoring for degradation and potential tampering 有权
    电缆均衡和监测降解和潜在篡改

    公开(公告)号:US08872978B2

    公开(公告)日:2014-10-28

    申请号:US13228823

    申请日:2011-09-09

    摘要: Provided herein are methods and systems that provide automatic compensation for frequency attenuation of a video signal transmitted over a cable. In accordance with an embodiment, a system includes an equalizer and a compensation controller. The equalizer receives a video signal that was transmitted over a cable, provides compensation for frequency attenuation that occurred during the transmission over the cable, and outputs a compensated video signal. The compensation controller automatically adjusts the compensation provided by the equalizer based on comparisons of one or more portions of the compensated video signal to one or more reference voltage levels. One or more values indicative of one or more levels of compensation provided by the equalizer are stored in memory and/or registers for each time, of a plurality of times. A monitor monitors for changes in the cable and/or the video signal transmitted over the cable based on the stored values. Additionally, the monitor can selectively trigger an alert based on changes in the one or more stored values.

    摘要翻译: 本文提供了对通过电缆传输的视频信号的频率衰减提供自动补偿的方法和系统。 根据实施例,系统包括均衡器和补偿控制器。 均衡器接收通过电缆传输的视频信号,提供在通过电缆传输期间发生的频率衰减的补偿,并输出经补偿的视频信号。 补偿控制器基于将补偿的视频信号的一个或多个部分与一个或多个参考电压电平进行比较,自动调整由均衡器提供的补偿。 指示由均衡器提供的一个或多个补偿级别的一个或多个值在多次存储在每一次的存储器和/或寄存器中。 监视器基于存储的值监视电缆和/或通过电缆传输的视频信号的变化。 此外,监视器可以基于一个或多个存储的值的改变来选择性地触发警报。

    Switching regulator input current sensing circuit, system, and method
    38.
    发明授权
    Switching regulator input current sensing circuit, system, and method 有权
    开关稳压器输入电流检测电路,系统及方法

    公开(公告)号:US08866453B2

    公开(公告)日:2014-10-21

    申请号:US12550081

    申请日:2009-08-28

    IPC分类号: G05F1/00 H02M3/156 H02M1/00

    摘要: A Buck switching regulator includes first Buck switching regulator circuitry is operable to generate a first output voltage from an input voltage and operable to generate a first sensed voltage having a value that is proportional to an output current being provided by the first Buck switching regulator circuitry. The first Buck switching regulator circuitry receives an input current and operates at a first duty cycle determined by a duty cycle signal. Input current sensing circuitry includes second Buck switching regulator circuitry coupled to the first Buck regulator switching circuitry to receive the duty cycle signal and to receive the first sensed voltage as an input voltage to the second Buck switching regulator circuitry. The second Buck switching regulator circuitry is operable responsive to the duty cycle signal to generate a second output voltage from the first sensed voltage. The second output voltage has a value that is proportional to the input current being supplied to the first Buck switching regulator circuitry. Such a Buck switching regulator can be utilized in a variety of different types of electronic systems, such as laptop computer systems, and can also be used in charging systems in laptop computer and other types of electronic systems.

    摘要翻译: 降压开关调节器包括第一降压开关稳压器电路,其可操作以从输入电压产生第一输出电压并且可操作以产生具有与由第一降压开关稳压器电路提供的输出电流成比例的值的第一感测电压。 第一降压开关稳压器电路接收输入电流并在由占空比信号确定的第一占空比下工作。 输入电流感测电路包括耦合到第一降压稳压器开关电路的第二降压开关稳压器电路,以接收占空比信号并将第一感测电压作为第二降压开关稳压器电路的输入电压接收。 第二降压开关稳压器电路响应于占空比信号而工作,以从第一感测电压产生第二输出电压。 第二输出电压具有与被提供给第一降压开关稳压器电路的输入电流成比例的值。 这种降压开关调节器可以用于各种不同类型的电子系统,例如膝上型计算机系统,并且还可以用于膝上型计算机和其他类型的电子系统中的充电系统。

    Gradient-based approach to sample-time mismatch error calibration in a two-channel time-interleaved analog-to-digital converter
    39.
    发明授权
    Gradient-based approach to sample-time mismatch error calibration in a two-channel time-interleaved analog-to-digital converter 有权
    基于梯度的两通道时间交错模数转换器采样时失配误差校准方法

    公开(公告)号:US08643517B2

    公开(公告)日:2014-02-04

    申请号:US13455617

    申请日:2012-04-25

    申请人: Sunder S. Kidambi

    发明人: Sunder S. Kidambi

    IPC分类号: H03M1/06

    摘要: Correcting phase error in a two-channel TIADC system in a manner that is independent of the Nyquist zone(s) occupied by the input signal. In the preferred approach this is done using the gradient of a phase error estimate. The gradient may be determined from a simplified expression of linear regression; the direction of the adaptation is then controlled by the sign of the gradient. The adaptive algorithm converges to the optimal value regardless of the Nyquist zone occupied by the input signal.

    摘要翻译: 以独立于输入信号所占据的奈奎斯特区域的方式校正双通道TIADC系统中的相位误差。 在优选的方法中,这是使用相位误差估计的梯度来完成的。 梯度可以从线性回归的简化表达式确定; 然后通过渐变的符号来控制适应的方向。 无论输入信号占用的奈奎斯特区域如何,自适应算法收敛到最优值。

    Multiple phase switching regulator with phase current sharing
    40.
    发明授权
    Multiple phase switching regulator with phase current sharing 有权
    具有相电流共享的多相开关稳压器

    公开(公告)号:US08629662B2

    公开(公告)日:2014-01-14

    申请号:US13772085

    申请日:2013-02-20

    IPC分类号: G05F1/10 G05B24/02

    摘要: A phase current sharing network that adjusts operation of a current mode multiphase switching regulator in which the phase current sharing network includes multiple synthetic ripple networks and a current share network. The regulator develops phase currents including ripple currents through corresponding phase inductors as controlled by corresponding pulse control signals. Each synthetic ripple networks develops a corresponding ripple voltage that simulates a corresponding phase ripple current and uses the ripple voltages to develop the pulse control signals. The current share network adjusts each ripple voltage by a combined adjustment value. The combined adjustment value is a combination of phase adjustment values in which each phase adjustment value is based on a difference between a corresponding one of ripple voltage and a reference voltage. Transconductance amplifiers may be used to convert the voltage differences to current adjust values applied to the ripple capacitors developing the ripple voltages.

    摘要翻译: 一个相电流共享网络,其调节电流模式多相开关稳压器的操作,其中相电流共享网络包括多个合成纹波网络和当前共享网络。 调节器通过相应的脉冲控制信号控制相应的相位电感器产生包括纹波电流的相电流。 每个合成纹波网络都会产生相应的纹波电压,模拟相应的纹波电流,并使用纹波电压来产生脉冲控制信号。 当前共享网络通过组合调整值调整每个纹波电压。 组合调整值是相位调整值的组合,其中每个相位调整值基于纹波电压和参考电压中的相应一个之间的差。 可以使用跨导放大器将电压差转换为施加到纹波电容器的电流调整值,从而产生纹波电压。