AMBIENT LIGHT DETECTION
    31.
    发明申请
    AMBIENT LIGHT DETECTION 有权
    环境光检测

    公开(公告)号:US20110141078A1

    公开(公告)日:2011-06-16

    申请号:US12884986

    申请日:2010-09-17

    CPC classification number: G01J1/18 G01J1/46

    Abstract: Ambient light is detected by a photodiode circuit by measuring the time taken for a digital output of the photodiode circuit to change state in response to exposure of a photodiode of the photodiode circuit to that ambient light. A nominal time for state change is calculated based on photodiode circuit characteristics. Furthermore, an effective time for the photodiode circuit digital output to change state is determined in a calibration mode where the photodiode has been disconnected and a reference current is applied to the circuit. An illumination value of the detected ambient light is then calculated as a function of: the measured time, the effective time and the nominal time.

    Abstract translation: 通过测量光电二极管电路的数字输出所需的时间以响应于光电二极管电路的光电二极管暴露于​​该环境光而改变状态,由光电二极管电路检测环境光。 基于光电二极管电路特性计算状态变化的标称时间。 此外,在光电二极管已经断开并且将参考电流施加到电路的校准模式中确定用于光电二极管电路数字输出改变状态的有效时间。 然后根据测量的时间,有效时间和标称时间来计算检测到的环境光的照明值。

    Battery-charger device with improved stability
    32.
    发明授权
    Battery-charger device with improved stability 有权
    电池充电器具有改善的稳定性

    公开(公告)号:US07692406B2

    公开(公告)日:2010-04-06

    申请号:US10869512

    申请日:2004-06-16

    CPC classification number: H02J7/0072 H02M1/08 H02M2001/0009

    Abstract: A circuit is provided for controlling a battery-charger device with a closed-loop architecture. The circuit includes sensing means for sensing an operative quantity of the device, control means, and driving means. The control means alternately controls the sensing means to track the operative quantity during a tracking phase and to hold the operative quantity during a holding phase. The driving means provides a regulation signal that regulates the operative quantity based on a comparison between the operative quantity sensed by the sensing means and a reference value. The control means causes the driving means to hold the regulation signal during at least part of each of the holding phases. Also provided is a method of controlling a battery-charger device with a closed-loop architecture.

    Abstract translation: 提供一种用于控制具有闭环结构的电池充电器装置的电路。 电路包括感测装置,用于感测装置的操作量,控制装置和驱动装置。 控制装置交替地控制感测装置在跟踪阶段跟踪操作量并在保持阶段保持操作量。 驱动装置提供调节信号,该调节信号基于感测装置感测的操作量与参考值之间的比较来调节操作量。 控制装置使得驱动装置在每个保持阶段的至少一部分期间保持调节信号。 还提供了一种控制具有闭环结构的电池充电器装置的方法。

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