Circuit modifications that help to meet design goals, such as faster power-on settling time and reduced false trigger due to some environmental sources in indoor and outdoor conditions, are also discussed.
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Low noise PIR signal chain for line powered motion detector
This reference design from Texas Instruments demonstrates how to design a low noise analog signal chain for PIR-based motion detection subsystems in line-powered applications resulting in longer detection range. This reference designs offers design theory, component selection, and circuit simulations for noise, settling time, stability and frequency response.