An output of the amplifier is applied to a signal detector, wherein an output signal of the signal detector is an indication of an output power level of the optical receiver.

放大器的输出施加到信号检测器，其中信号检测器的输出信号是光接收机的输出功率电平的指示。

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Operational amplifier is the most versatile signal conditioning block in any portable system. It can be a filter, an amplifier, an voltage detector, a level shifter, a buffer or even a switch.

对于便携式电子产品来说，运算放大器可算是万能的信号调节电路，因为它可以执行滤波器、放大器、电压感测器、电平移位器、缓冲器、甚至开关等多种不同功能。

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When high level sparks are detected, the infeed conveyor is stopped, and the product reject flap in the discharge chute is opened by a signal from the spark detector control unit.

当火花出现频率较高时，进料振槽停止工作，并且在出料槽内的分料风门，从火花探测器得到一个信号，并被打开。

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