Sensors
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.
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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