Sensing circuit
A pyroelectric sensor with integrated operational amplifier and reference voltage supply in the microcontroller addresses noise-induced false triggers in consumer electronics, enhancing detection accuracy and reducing power waste.
GB2611331BActive Publication Date: 2026-06-11SKY CP LTD
Patent Information
- Authority / Receiving Office
- GB · GB
- Patent Type
- Patents
- Current Assignee / Owner
- SKY CP LTD
- Filing Date
- 2021-09-30
- Publication Date
- 2026-06-11
AI Technical Summary
Technical Problem
Consumer electronic devices face issues with false triggering due to noise sensitivity in passive infrared (PIR) sensors, leading to unnecessary power consumption and disturbances in low-power standby modes.
Method used
A low power sensor, such as a pyroelectric sensor, outputs a small analogue signal to a microcontroller with an integrated operational amplifier that uses a reference voltage supply for stable power, reducing noise and false triggers by integrating the power supply within the microcontroller.
Benefits of technology
This configuration minimizes noise interference, ensuring accurate detection and reducing component count, thereby maintaining low power consumption and operational reliability.
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Abstract
A consumer electronic device 1 includes a low power (e.g. pyroelectric) sensor 8 arranged to detect the presence of a person 6, for example to switch from standby to full power mode. The sensor may ou
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