Visible light communication receiver dedicated chip using diversity reception technology

Abstract

The invention provides a dedicated chip of a visible light communication receiver adopting diversity reception technology. Output ends of a first photoelectric detector and a second photoelectric detector are correspondingly connected with a first transimpedance amplifier and a second transimpedance amplifier respectively, the output ends of the first transimpedance amplifier and the second transimpedance amplifier are commonly connected with an input end of an addition synthesizer, the output end of the addition synthesizer is sequentially connected with a single end to double end circuit, apost equalization circuit, an amplitude limiting amplifier, a double end to single end circuit and an inverter, the output end of the inverter constitutes the output end of the dedicated chip of the visible light communication receiver, a DC offset cancellation circuit is also provided, the input end of the DC offset cancellation circuit is connected with the output end of the amplitude limiting amplifier, and the output end of the DC offset cancellation circuit is connected with the input end of the post equalization circuit. The dedicated chip provided by the invention achieves the functionof a double-channel receiver with a high data rate in a visible light LED lighting environment, and has the advantages of low power consumption, high bandwidth, high integration, low cost, easy large-scale production, etc.

Description

technical field [0001] The invention relates to a special chip for a visible light communication receiver. In particular, it relates to a dedicated chip for a visible light communication receiver using diversity receiving technology. Background technique [0002] In recent years, with the rapid development of electronic technology, the total number of users and the penetration rate of smart devices have increased significantly year by year, and people's demand for high-speed broadband multimedia communication has also increased. At this time, traditional radio frequency communication is in a state of shortage of spectrum resources, coupled with the limitations of electromagnetic radiation interference and other factors, and people's increasing attention to the impact of radiation on physical health, prompting the creation of a resource that can broaden the spectrum, through green and energy-saving LED lights. The communication method of the transmission base station is visi...

AI Technical Summary

Problems solved by technology

[0006] In the research and development process of the receiver circuit, due to the complexity of the circuit and the large number of cascaded circuit modules, it is very easy for the DC level drift of the circuit to occur, that is, the offset of the static operating point, resulting in the unstable operation of the entire circuit, or even failure to work.

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