Low noise PIR signal chain reference design with less false alarm for line powered motion detector
Description
This reference design 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.
Features
- Faster power-on settling time Reduced false trigger: Fifth order roll-off at lower cut-off and forth order roll-off at higher cut-offCircuit bandwidth: 0.3 Hz to 6.5 HzReferred to output noise Phase margin > 72º for all amplifier stages
Applications
- Occupancy detection (people tracking
- people counting)
- Analog security camera
- 2-wheeler & 3-wheeler traction drive
- IP network camera
- Motion detector
Product Categories
- Amplifiers