Trans-impedance compensation type visible light communication receiver

Abstract

The invention relates to a trans-impedance compensation type visible light communication receiver comprising a visible light detector for converting an inputted visible light signal into a current signal, a trans-impedance pre amplifier for converting the current signal outputted by the visible light detector into a voltage signal, a limiting amplifier for amplifying the voltage signal outputted by the trans-impedance pre amplifier to be at a voltage level needed by a digital processing unit, and an output buffer stage unit for providing a voltage signal at a digital voltage level. The input terminal of the trans-impedance pre amplifier is connected to the output terminal of the trans-impedance pre amplifier by a feedback resistor and a feedback inductor; and the output of the output buffer stage unit forms an output terminal. According to the invention, with a standard CMOS process, broadening of the bandwidth of the visible light receiver is realized and thus the visible light communication system takes an important step towards integration. The optical communication system and the semiconductor communication chip industry are combined; and the visible light communication chip enables the new vitality to be injected into the communication chip industry.

Description

technical field [0001] The present invention relates to a communication receiver. In particular, it relates to a transimpedance-compensated visible light communication receiver that uses a CMOS process to realize receiver integration in the visible light band. Background technique [0002] Visible Light Communication (VLC for short), as an emerging technology in the field of wireless communication, is developed on the basis of white light LED technology. White LED has been widely used in signal transmission, display lighting and other fields. Compared with traditional lighting sources, white LED is an outstanding green lighting source. It has high brightness, small size, low power consumption, easy driving, Long service life, environmental protection, especially high response sensitivity, good modulation characteristics, so it can be used for data communication. Using computers and mobile terminals equipped with transceiver terminals, data such as high-definition images an...

AI Technical Summary

Problems solved by technology

[0004] Although VLC technology has become a hotspot in current international research, there are still some limiting factors in the development of VLC technology, the main challenge of which is the improvement of signal transmission rate.

The limited bandwidth of visible light detectors greatly limits the rate of visible light communication systems, making it impossible for VLC systems to be put into use in daily life in a short period of time.

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