Systems and methods for advanced monitoring and control using an LED driver in an optical processor
    1.
    发明授权
    Systems and methods for advanced monitoring and control using an LED driver in an optical processor 有权
    使用光学处理器中的LED驱动器进行高级监控和控制的系统和方法

    公开(公告)号:US08723149B2

    公开(公告)日:2014-05-13

    申请号:US12943263

    申请日:2010-11-10

    Abstract: Systems and methods for advanced monitoring and control using an LED driver in an optical processor are described. In an embodiment, a monitoring and control circuit may include a light-emitting diode (LED) driver including a control input, an output, and a node, wherein the output is coupled to an LED. The circuit may also include a multiplexer coupled to the node of the LED driver, an analog-to-digital converter coupled to the multiplexer, and a controller coupled to the analog-to-digital converter and to the control input of the LED driver, wherein the LED driver is coupled to drive the output with a first voltage supply that is independent from a second voltage supply that is coupled to drive the controller.

    Abstract translation: 描述使用光学处理器中的LED驱动器进行高级监视和控制的系统和方法。 在一个实施例中,监视和控制电路可以包括包括控制输入,输出和节点的发光二极管(LED)驱动器,其中输出耦合到LED。 电路还可以包括耦合到LED驱动器的节点的多路复用器,耦合到多路复用器的模数转换器,以及耦合到模数转换器和LED驱动器的控制输入端的控制器, 其中所述LED驱动器被耦合以用与被耦合以驱动所述控制器的第二电压源独立的第一电压源驱动所述输出。

    Second-order delta-sigma analog-to-digital converter
    2.
    发明授权
    Second-order delta-sigma analog-to-digital converter 有权
    二阶delta-sigma模数转换器

    公开(公告)号:US08253613B2

    公开(公告)日:2012-08-28

    申请号:US12956775

    申请日:2010-11-30

    Abstract: In one embodiment, a second-order delta-sigma analog-to-digital converter (ADC) includes a second-order integrator adapted to second-order integrate a value at a first node, where the first node is coupled to an input of the ADC. The ADC also includes a comparator coupled to an output of the second-order integrator. The ADC further includes a digital-to-analog converter (DAC) coupled between an output of the comparator and the first node. The DAC is adapted to receive a digital output of the comparator and to generate a first charge or a second charge. The DAC includes a first charge pump adapted to produce the first charge and a second charge pump adapted to produce the second charge. The first and second charges are asymmetric.

    Abstract translation: 在一个实施例中,二阶Δ-Σ模数转换器(ADC)包括二阶积分器,其适于在第一节点处对值进行二阶积分,其中第一节点耦合到 ADC。 ADC还包括耦合到二阶积分器的输出的比较器。 ADC还包括耦合在比较器的输出和第一节点之间的数模转换器(DAC)。 DAC适于接收比较器的数字输出并产生第一充电或第二充电。 DAC包括适于产生第一电荷的第一电荷泵和适于产生第二电荷的第二电荷泵。 第一和第二个费用是不对称的。

    Apparatus and method for output signal pulse width error correction in a communications receiver
    4.
    发明授权
    Apparatus and method for output signal pulse width error correction in a communications receiver 失效
    通信接收机中输出信号脉冲宽度误差校正的装置和方法

    公开(公告)号:US06169765A

    公开(公告)日:2001-01-02

    申请号:US08864286

    申请日:1997-05-28

    CPC classification number: H04L25/08 H03K5/1565

    Abstract: An output signal pulse width error correction circuit and method wherein errors in a data signal conforming to a communications protocol having a prescribed duty cycle are corrected by monitoring a duty cycle of the data signal, comparing the duty cycle to a duty cycle reference voltage corresponding to the prescribed duty cycle, and adjusting a pulse width of the data signal to conform to the prescribed duty cycle of the protocol. An embodiment is shown that low pass filters the input data signal to introduce greater slope to the input data signal which is then compared to a pulse width control voltage in order to generate an output data signal. The pulse width control voltage is produced by integrating the output data signal to obtain an average value corresponding to the duty cycle of the output data signal and comparing the average value to a duty cycle reference voltage corresponding to the prescribed duty cycle for the communications protocol. Another embodiment directed toward an integrated circuit implementation is shown that converts the input data signal into complementary input data current signals, using current mirror circuits, which are used to drive complementary variable delay circuits. The pulse width control voltage is also converted into complementary error current signals which adjust the duty cycle of output data signal by controlling the variable delay circuits.

    Abstract translation: 一种输出信号脉冲宽度误差校正电路和方法,其中通过监视数据信号的占空比来校正符合具有规定占空比的通信协议的数据信号中的误差,将占空比与占空比对应于 规定的占空比,并且调整数据信号的脉冲宽度以符合协议的规定占空比。 示出了实施例,低通滤波输入数据信号以向输入数据信号引入更大的斜率,然后将其与脉冲宽度控制电压进行比较,以便产生输出数据信号。 通过对输出数据信号进行积分以获得与输出数据信号的占空比相对应的平均值,并将该平均值与通信协议的规定占空比对应的占空比参考电压进行比较,产生脉冲宽度控制电压。 示出了针对集成电路实现的另一实施例,其使用用于驱动互补可变延迟电路的电流镜像电路将输入数据信号转换为互补输入数据电流信号。 脉冲宽度控制电压也转换为互补误差电流信号,通过控制可变延迟电路来调节输出数据信号的占空比。

    Method and apparatus for spectrally-corrected ambient light sensor
    5.
    发明授权
    Method and apparatus for spectrally-corrected ambient light sensor 有权
    光谱校正环境光传感器的方法和装置

    公开(公告)号:US08803096B2

    公开(公告)日:2014-08-12

    申请号:US12894906

    申请日:2010-09-30

    Abstract: In one embodiment, a method includes receiving outputs from multiple photodetectors, calculating a first ratio between first and second such outputs, calculating a second ratio between the first output and a difference corresponding to a flicker noise component obtained from the second output, and determining a contribution from multiple illumination types based at least in part on the first and second ratios. The method may also include obtaining multiple correction coefficients based at least in part on the determined contribution, and in turn determining an ambient light type present in proximity to the photodetectors using the correction coefficients and the first and second outputs.

    Abstract translation: 在一个实施例中,一种方法包括接收来自多个光电检测器的输出,计算第一和第二这样的输出之间的第一比率,计算第一输出与对应于从第二输出获得的闪烁噪声分量的差值之间的第二比率, 至少部分地基于第一和第二比例从多个照明类型的贡献。 该方法还可以包括至少部分地基于所确定的贡献来获得多个校正系数,并且进而使用校正系数和第一和第二输出来确定存在于光电检测器附近的环境光类型。

    Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms
    6.
    发明授权
    Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms 有权
    在烟雾报警器中使用光学反射率接近检测器进行有害扰动

    公开(公告)号:US08754775B2

    公开(公告)日:2014-06-17

    申请号:US12727983

    申请日:2010-03-19

    Abstract: A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal.

    Abstract translation: 烟雾报警器包括烟雾检测电路,用于检测烟雾并响应于此产生检测信号。 接近检测电路响应于在烟雾报警器的选定距离内的物体的检测而产生接近检测信号。 报警产生电路响应于检测信号产生可听见的报警。 响应于至少一个接近检测信号,声音报警可以停用预定的时间段。

    System and Circuit Including Multiple Photo Detectors
    8.
    发明申请
    System and Circuit Including Multiple Photo Detectors 有权
    包括多个光电探测器的系统和电路

    公开(公告)号:US20110248151A1

    公开(公告)日:2011-10-13

    申请号:US12948615

    申请日:2010-11-17

    Abstract: A system includes a plurality of photo detectors, which generate signals proportional to incident light. The system further includes an optical barrier adjacent to a surface and includes a control circuit. The optical barrier partially obstructs reflected light from reaching the plurality of photo detectors to produce a spatially dependent reflectance pattern that is dependent on a position of an object relative to a substrate. The control circuit determines a position of the object during a reflectance measurement cycle using each of the plurality of photo detectors by calibrating to ambient light conditions, measuring ambient plus reflected light, determining the reflected light and detecting the position of the object based on a ratio of the reflected light received by at least two of the plurality of photo detectors.

    Abstract translation: 一种系统包括多个光电检测器,其产生与入射光成比例的信号。 该系统还包括邻近表面的光学屏障并且包括控制电路。 光学屏障部分阻碍反射光到达多个光电检测器以产生取决于物体相对于基底的位置的空间依赖性反射率图。 控制电路通过校准到环境光条件,测量环境加上反射光,确定反射光并基于比例检测物体的位置来确定反射测量周期期间物体在反射测量周期中的位置 由多个光电检测器中的至少两个接收的反射光。

    SYNCHRONOUS VCC GENERATOR FOR SWITCHING VOLTAGE REGULATOR
    9.
    发明申请
    SYNCHRONOUS VCC GENERATOR FOR SWITCHING VOLTAGE REGULATOR 有权
    用于切换电压调节器的同步VCC发生器

    公开(公告)号:US20110157941A1

    公开(公告)日:2011-06-30

    申请号:US12649970

    申请日:2009-12-30

    CPC classification number: H02M3/33507 H02M2001/0006

    Abstract: A capacitor is charged synchronously with the beginning of an ON portion of a pulse width modulated (PWM) signal to generate a voltage across the capacitor using charging current sourced from an inductor on a primary side of a transformer. The voltage is supplied as a supply voltage to control circuitry in an integrated circuit used to generate the pulse width modulated signal. The charging is stopped when either the charging current goes above a predetermined charging current level or when the capacitor voltage goes above a predetermined capacitor voltage.

    Abstract translation: 电容器与脉冲宽度调制(PWM)信号的ON部分的开始同步地进行充电,以使用来自变压器初级侧的电感器的充电电流产生电容器两端的电压。 将电压作为电源电压提供给用于产生脉宽调制信号的集成电路中的控制电路。 当充电电流超过预定充电电流电平或电容器电压超过预定电容器电压时,充电停止。

    Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms
    10.
    发明申请
    Use of optical reflectance proximity detector for nuisance mitigation in smoke alarms 有权
    在烟雾报警器中使用光学反射率接近检测器进行有害扰动

    公开(公告)号:US20100238036A1

    公开(公告)日:2010-09-23

    申请号:US12727983

    申请日:2010-03-19

    Abstract: A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal.

    Abstract translation: 烟雾报警器包括烟雾检测电路,用于检测烟雾并响应于此产生检测信号。 接近检测电路响应于在烟雾报警器的选定距离内的物体的检测而产生接近检测信号。 报警产生电路响应于检测信号产生可听见的报警。 响应于至少一个接近检测信号,声音报警可以停用预定的时间段。

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