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    • 1. 发明申请
    • APPARATUS AND METHOD FOR SELECTIVELY DRIVING A PIEZO TRANSDUCER
    • 选择性地驱动PIEZO传感器的装置和方法
    • US20100259402A1
    • 2010-10-14
    • US12788500
    • 2010-05-27
    • THOMAS ALLEN KNOTTS
    • THOMAS ALLEN KNOTTS
    • G08B21/00
    • H04R17/00
    • Devices and methods are provided for selectively driving a piezo transducer to operate as a pressure pattern detector or an alarm generator. In one embodiment, there is provided a device that includes: a piezo transducer; a comparator coupled to the transducer and a reference voltage; and a pressure pattern recognition circuit coupled to a comparator output of the comparator. The pressure pattern recognition circuit may be configured to: (i) determine whether the pressure pattern satisfies a predetermined condition; and (ii) in response to the pressure pattern satisfying the predetermined condition, generate an output signal.
    • 提供了用于选择性地驱动压电换能器作为压力图案检测器或报警发生器操作的装置和方法。 在一个实施例中,提供了一种装置,其包括:压电换能器; 耦合到换能器的比较器和参考电压; 以及耦合到比较器的比较器输出的压力模式识别电路。 压力模式识别电路可以被配置为:(i)确定压力图案是否满足预定条件; 和(ii)响应于满足预定条件的压力图形,生成输出信号。