In this paper, a photodiode (PD)/transimpedance (TIA) interface is presented. The cathode terminal of the PD is AC-coupled to one of the inputs of a pseudo-differential TIA while the anode terminal is DC-coupled to the other input of the TIA. The DC-coupled input provides a path for the low-frequency component of the input signal to reach the output. This component is extracted by a baseline wander compensation scheme (BWCS) and fed to the input to eliminate signal drift after long data runs. Compared with the conventional pseudo-differential receiver, the proposed interface improves the gain, the gain-bandwidth product (GBW), and the signal-to-noise ratio (SNR) by 5dB, 1.37× and 4.5dB, respectively, while maintaining 209× smaller low cutoff frequency than the AC coupled receiver. The proposed interface is compatible with any TIA topology. Post-layout simulations and analytical models validate the feasibility of the proposed technique.
Research Member
Research Department
Research Date
Research Year
2024
Research Journal
IEEE Access
Research Publisher
IEEE
Research Vol
12
Research_Pages
126858-126865
Research Website
https://ieeexplore.ieee.org/document/10669000
Research Abstract
Research Rank
International Journal