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    • 1. 发明授权
    • Interrupting low battery indicator
    • 中断低电量指示
    • US5140310A
    • 1992-08-18
    • US442750
    • 1989-11-29
    • Michael J. DeLucaPamela A. Rakolta
    • Michael J. DeLucaPamela A. Rakolta
    • G08B5/22G08B21/20
    • G08B21/185G08B5/229Y10S320/18
    • An electrical device has a display and a battery which has a varying electrical condition. The display typically displays information to be read by the user of the device. In response to a low battery detection, the information being displayed may be interrupted with information indicating the battery is low. The timing of the interruption increases as the battery nears depletion thereby giving user an indication of the remaining battery capacity. The variation in timing includes either increasing the duty cycle of the periodic interruption, decreasing the period of the interruption, or both. The electrical device may include a wrist watch paging receiver with a message display and a clock with time of day and date functions.
    • 电气设备具有显示器和具有变化的电气条件的电池。 显示器通常显示要由设备的用户读取的信息。 响应于低电量检测,正在显示的信息可能被中断,指示电池电量低的信息。 中断的时间随着电池耗尽而增加,从而给用户指示剩余的电池容量。 定时的变化包括增加周期性中断的占空比,减少中断的周期,或者两者。 电气设备可以包括具有消息显示的手表寻呼接收机和具有日期和日期功能的时间的时钟。
    • 6. 发明授权
    • Continuous integration digital demodulator for use in a communication
device
    • 用于通信设备的连续集成数字解调器
    • US5949827A
    • 1999-09-07
    • US934404
    • 1997-09-19
    • Michael J. DeLucaEmilio J. Quiroga
    • Michael J. DeLucaEmilio J. Quiroga
    • H04L25/06H04L27/14
    • H04L25/061
    • A digital demodulator (100) for use in a communication device comprising a mixer (110) which samples a limited IF signal derived from a received radio frequency (RF) signal at a rate less than a Nyquist rate of the limited IF signal and generates a resulting IF signal. A continuous integrator (130) is connected to the mixer (110) and integrates the resulting IF signal over a predetermined number of samples thereof to generate a numerical value representative of a modulation frequency of a limited IF signal. An adaptive peak-valley bit slicer (150) is connected to the continuous integrator (130) and compares each numerical value with a peak threshold, a valley threshold and a mid threshold and generates most-significant-bit (MSB) and least-significant-bit (LSB) values for each sample. The adaptive peak-valley bit slicer (150) adjusts the peak and valley thresholds for use in determining a level of a current numerical value based on the LSB and MSB values determined for a prior sample of the numerical value.
    • 一种用于通信设备的数字解调器(100),包括:混合器(110),其以小于受限IF信号的奈奎斯特速率的速率从接收到的射频(RF)信号中得到的有限IF信号进行采样, 产生IF信号。 连续积分器(130)连接到混频器(110),并将所得IF信号在预定数量的采样上积分,以产生表示有限IF信号的调制频率的数值。 自适应峰谷位限幅器(150)连接到连续积分器(130),并将每个数值与峰值阈值,谷值阈值和中间阈值进行比较,并产生最高有效位(MSB)和最小有效位 (LSB)值。 自适应峰谷位限幅器(150)基于为数值的先前样本确定的LSB和MSB值来调整用于确定当前数值的电平的峰谷阈值。