Amplitude modulatable smart home infrared communication circuit

Abstract

The invention relates to the smart home communication field, and particularly relates to an amplitude modulatable smart home infrared communication circuit. The circuit comprises: an input module; an amplification modulation circuit, which amplifies and modulates signals, converts the signals into symmetrical square wave signals and then transmits the signals to an amplitude modulation circuit; the amplitude modulation circuit, which performs amplitude modulation on the signals, then transmits the signals to an infrared transmitting module; the infrared transmitting module, which converts the modulation signals into infrared signals and performs transmitting; an infrared receiving module, which receives infrared signals, completes optical-to-electric signal conversion, and transmits the converted signals to an amplification demodulation circuit; the amplification demodulation circuit, which conducts amplification-filtering demodulation treatment on the signals transmitted by the infrared receiving module and then sends the treated signals to an output module; and the output module. The amplitude modulatable smart home infrared communication circuit provided by the invention has the advantages of high performance cost ratio, simple realization, electromagnetic interference resistance, convenient high speed application, and flexible space access, can be used for indoor and outdoor point-to-point transmission, can achieve arbitrary amplitude modulation on signal square wave, and can select power appropriate for output to facilitate receiving according to different installation environments.

Description

technical field [0001] The invention relates to the field of smart home communication, in particular to an infrared communication circuit for smart home with adjustable amplitude. Background technique [0002] Smart home, or smart residence, takes the residence as a platform, combines construction, network communication, information appliances, equipment automation, and integrates systems, structures, services, and management into an efficient, comfortable, safe, convenient, and environmentally friendly living environment. It is convenient to connect various devices in the home, such as audio and video equipment, lighting system, curtain control, air conditioning control, security system, digital theater system, network appliances, etc., through the home network. [0003] Existing smart home devices are generally connected via Bluetooth or the Internet, which requires additional network communication chips, which are costly. Moreover, existing old-fashioned household applian...

AI Technical Summary

Problems solved by technology

[0003] Existing smart home devices are generally connected via Bluetooth or the Internet, which requires additional network communication chips, which are costly. Moreover, existing old-fashioned household appliances generally use infrared communication, and there are few ways to use digital network communication. Although existing household appliances also have Products embedded with smart chips are expensive and not suitable for promotion. Due to the high driving power requirements of the infrared emitting tube, the communication distance is limited in the case of low driving power, so it is not suitable for long-distance use, but long-term high-power The output will lead to excessive power consumption, and the heat dissipation of the system will also be affected to a certain extent.

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