According to the principle of view the Doppler frequency detection, the detector makes up of the transmitter, the transfer circuit, receiver and signal processing circuit.
根据多卜勒频偏检测原理，该探测器由发射机、转换电路、接收机和信号处理电路构成，发射信号是设计的关键。
The circuit has wide frequency bandwidth, high voltage and current transfer accuracy, simple structure. For this reason, it is easy to be realized with low cost for universal applications.
该电路具有频带宽、电压传输和电流传输精度高、结构简单、易于实现及成本低廉且实用性好的特点。
This paper designs a circuit based on hysteresis comparator and filter which is used to transfer frequency signal.
设计了一种由滤波器和迟滞比较器构成的传输频率信号电路。
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