Integrated circuit special for visible light communication transmitting end

Abstract

The invention relates to an integrated circuit special for a visible light communication transmitting end. The integrated circuit comprises a residual carrier extraction circuit, a pre-emphasis circuit and a series driving circuit, wherein the residual carrier extraction circuit is connected to the input end of a fluorescent white light LED and is used for accelerating a dimming process of the fluorescent white light LED to improve the data transmission rate of visible light communication; the pre-emphasis circuit is used for adjusting the amplitude-frequency characteristic of the received input signal, suppressing the gain of a low-frequency part, and increasing and outputting the gain of a high-frequency part; the input end of the series driving circuit is connected to the output end ofthe pre-emphasis circuit, and the output end of the series driving circuit is connected to the input end of the fluorescent white light LED; the series driving circuit is used for modulating the received signal to the fluorescent white light LED; the output end of the series driving circuit is also connected to the input end of the residual carrier extraction circuit for sending a control signal which acts on the fluorescent white light LED to the residual carrier extraction circuit. According to the integrated circuit, a technology of combining pre-emphasis and residual carrier extraction isadopted in the design of the transmitting end, and the bandwidth of a visible light communication system can be remarkably improved.

Description

technical field [0001] The invention relates to a visible light communication circuit. In particular, it relates to an application-specific integrated circuit for a visible light communication transmitter realized by a CMOS process. Background technique [0002] With the continuous development of electronic technology, the total number of users and the penetration rate of smart devices have increased year by year, and people's demand for high-speed broadband multimedia communication has also increased significantly. Facing the ever-increasing demand for communication, traditional radio frequency communication has a shortage of spectrum resources, coupled with the limitations of factors such as electromagnetic radiation interference, and consumers are increasingly paying attention to the impact of radiation on health. People urgently need a wide-spectrum, green and energy-saving Therefore, visible light communication technology has become a current research hotspot. [0003...

AI Technical Summary

Problems solved by technology

[0004] Although visible light communication technology has broad development prospects and has attracted widespread attention from researchers, the shortcoming of the narrow bandwidth of the visible light communication system severely limits the signal transmission rate, which has become a bottleneck restricting the development of visible light communication technology.

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