A standard cmos fully differential optoelectronic integrated receiver for visible light communication

Abstract

A standard CMOS fully differential optoelectronic integrated receiver for visible light communication, including sequentially connected: a fully differential transimpedance preamplifier for converting a pair of differential current signals into a pair of differential voltage signals, for converting a fully differential A fully differential limiting amplifier that amplifies the voltage signal output by the transimpedance preamplifier to the voltage level required by the digital processing unit, a fully differential equalizer used to compensate the frequency response characteristics of the output signal of the fully differential limiting amplifier, And a differential-to-single-ended output buffer stage for converting the differential voltage signal output by the fully differential equalizer that has reached the digital voltage level into a single-ended output voltage signal, and a fully differential transimpedance preamplifier input terminal A pair of fully differential photodetectors for converting incoming visible light signals from the outside into a pair of fully differential current signals are connected. The invention realizes the integration of the visible light communication receiver and improves the receiver sensitivity.

Description

technical field [0001] The invention relates to a receiver for visible light communication. In particular, it relates to a standard CMOS fully differential optoelectronic integrated receiver for visible light communication. Background technique [0002] White light LED (light-emitting diode) has now been widely used in signal emission, display lighting and other fields. Compared with traditional lighting sources, white LED is an outstanding green lighting source, which has high brightness, small size, low power consumption, easy driving, long service life, green environmental protection, especially high response sensitivity, and has good The modulation characteristics can be used for data communication. Based on the above reasons, Visible Light Communication (VLC for short) has emerged as an emerging technology in the field of wireless communication. Indoor visible light communication technology can meet our indoor network requirements and daily indoor lighting. Compared...

AI Technical Summary

Problems solved by technology

Although this can overcome the problem of high-frequency stability of the circuit, as mentioned above, the detector area of ​​visible light communication is relatively large, and completely covering one of the detectors is a great waste of chip area, which affects the sensitivity of the optical receiver.

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