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    • 82. 发明申请
    • ULTRA-LOW POWER WAKEUP CIRCUIT DEVICE
    • 超低功耗唤醒电路
    • US20130293399A1
    • 2013-11-07
    • US13855030
    • 2013-04-02
    • GENERALPLUS TECHNOLOGY INC.
    • Tung-Tsai LIAOHsin-Chou LEEHsin-Lung LAI
    • H03M11/20
    • H03M11/20H03M11/08
    • An ultra-low power wakeup circuit device includes a keyboard, a key scan circuit, a storage unit, and a comparator unit. The key scan circuit sequentially outputs scanning signals from the first scan line to N-th scan line for acquiring N key scan data. The key scan circuit performs an XOR operation on the N key scan data to generate a current key scan data. The storage unit is connected to the key scan circuit for receiving the current key scan data and storing the current key scan data as a previous key scan data. The comparator unit is connected to the key scan circuit and the storage unit for comparing the current key scan data with the previous key scan data.When the current key scan data is different from the previous key scan data, the comparator unit generates a wakeup signal.
    • 超低功率唤醒电路装置包括键盘,键扫描电路,存储单元和比较器单元。 按键扫描电路顺序输出从第一扫描线到第N扫描线的扫描信号,以获取N个键扫描数据。 键扫描电路对N键扫描数据执行XOR操作,以生成当前键扫描数据。 存储单元连接到键扫描电路,用于接收当前键扫描数据并将当前键扫描数据存储为先前的键扫描数据。 比较器单元连接到键扫描电路和存储单元,用于将当前键扫描数据与先前的键扫描数据进行比较。 当当前的键扫描数据与先前的键扫描数据不同时,比较器单元产生唤醒信号。