Passive infrared motion sensor has second regulator whose output voltage ensures voltage supply to sensor element(s) and is also used as reference voltage for other components

摘要

The device has at least one sensor element (SE) on a circuit board and a circuit for signal evaluation and processing with at least one amplifier and switching signal source supplied by a first voltage regulator (U1), which also supplies a second voltage regulator (U2). The second regulator's output voltage ensures the voltage supply to the sensor element(s) and is also used as a reference voltage (BZP) for other components.