Human body sensing chip used for infrared pyroelectricity

Abstract

The invention discloses a human body sensing chip used for infrared pyroelectricity. The chip comprises an internal integration circuit and a pipe pin region. The integration circuit comprises a difference analog-to-digital converter module, a digital filtering module, a control circuit module, and an output circuit module. The pipe pin region comprises a signal input end, a signal output end, a power supply positive end and a grounding end. According to the invention, the chip is highly integrated; the system is simple; at least only four pipe pins are required; and miniaturation of the system is quite facilitated.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a human body induction chip for infrared pyroelectricity. Background technique [0002] The pyroelectric infrared human body sensor is an infrared signal that uses the body's own heat to convert into a weak electrical signal through the pyroelectric sensor. This weak electrical signal is amplified, filtered and other signal processing to achieve various control functions. s installation. Pyroelectric infrared human body sensor has a wide range of applications. It can automatically and quickly turn on various incandescent lamps, fluorescent lamps, buzzers, automatic doors, electric fans, dryers and automatic sinks. It is especially suitable for enterprises and hotels. , Shopping malls, warehouses and family aisles, corridors and other sensitive areas, or automatic lighting, lighting and alarm systems for safe areas. [0003] The infrared pyroelectric human body sensor chip is ...

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above chart that the traditional infrared pyroelectric human body induction chip generally requires a number of resistors, capacitors and other components around the chip to cooperate with the chip to achieve some parameters or functions. Therefore, the traditional infrared pyroelectric human body induction chip tube Many pins, low integration, cumbersome system

In order to simplify the chip system, make it more integrated and perform better, the applicant applied for a human body sensor chip for infrared pyroelectricity in June 2017 (application number 201710464161.X, issued on September 1, 2017 Published in Japan), the chip disclosed in this invention has a relatively high integration level and is compatible with existing chips, but it is still a multi-pin chip, and it also requires certain peripheral resistors, capacitors and other components to cooperate with the chip to realize

The above factors lead to the complexity of the infrared pyroelectric body sensor chip system in the prior art, limited volume, and difficulty in miniaturization.

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