RD627

RD627 Doppler effect sensor 7 foot single-line plastic package and the pin arrangement are shown in Figure 1. Figure 2 is a functional block diagram of its internal circuitry.  RD627 is composed of  the oscillator, transmitter, detector, Doppler signal amplifier, limiter and power supply components.

 

 

Microwave oscillator signal generated by the transmitter is sent to an external antenna to the feet of space, resulting in a three-dimensional microwave protection zone, when people or other objects are moving in the protection zone, the reflected microwave signal with the original will have a frequency shift between the signals, the weak frequency shift signal is processed by the detector, to obtain the Doppler signal and then amplified in the first 6 feet moving target, which can be obtained with the corresponding electrical signal.