학술논문
SPICE Modeling in Verilog-A for Photo-Response in UTC-Photodiodes Targeting Beyond-5G Circuit Design
Document Type
Periodical
Author
Source
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems IEEE Trans. Comput.-Aided Des. Integr. Circuits Syst. Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on. 42(9):3045-3052 Sep, 2023
Subject
Language
ISSN
0278-0070
1937-4151
1937-4151
Abstract
This article reports the first accurate and physics-based Verilog-A implementation of the fully analytic form of photocurrent in SPICE compact models for uni-traveling carrier (UTC) photodiodes (PDs). To overcome the limitations of single-pole network implementations for modeling frequency dependence of the photo-response, especially at frequencies beyond 100 GHz, we explored different solutions for the complete analytic equation of the dynamic photocurrent. A new implementation has been proposed which requires three additional nodes in the UTC-PD electrical equivalent circuit and offers the best tradeoff between accuracy and computational efficiency. Model validation has been performed against on-wafer measurements from two UTC-PD technologies depicting very good accuracy over the entire frequency range.