An Active Inductor Based TIA with Ambient Light Rejection for VLC Applications

Visible light communication (VLC) is becoming a popular technology for its attractive features of electromagnetic interference free, high-bandwidth, high security, and license-free operation. VLC receivers are getting a favorable amount of research interest as it is more convenient to manipulate low power signals than the large current signals in VLC transmitter. In this paper, a VLC receiver design is proposed, which uses an active-inductor-based peaking technique to enhance the modulation bandwidth of the receiver for various VLC applications. By employing the peaking technique, a -3 dB bandwidth of 80 MHz is achieved with 94 dBΩ of total transimpedance gain. The whole receiver consumes 3.2 mW of power consumption, which reduces to ∼1.2 mW if the power consumed due to the termination resistor of 50 Ω is ignored. The ambient light rejection capability of the proposed design is 70 μA.