Circuits de photo-réception adaptés très faibles bruits et à grande dynamique

摘要

This work is based on a common project support by the DGA, the project ROHYLAB for “wide band opto-microwave receiver” with Vectrawave . This work aim to optimized the optic-electric interface of a receiver in the radio-over-fiber field to design a low noise and high dynamic receiver. After an overview of radio-over-fiber's avantages such as: high data rates, security and security, we presented different photoreceiver and the figure of merit used to caracterized them. This step allow a comparison of the photoreceiver classified by the design topologies used in order to choose which design methodology we will used in this work. In an other hand, the same analysis is done for the transistor technologies. We presented a study of photoreceiver as a system in order to highlight the impact of main caracteritics on its performances. From this analysis allow to show a narrow band design method which link the caracteristics of the photodiode to the transistor's caracteristics. We also present some design tools such as circles of constant equivalent noise current density and circles of constant transimpedance. From the photoreceiver's theoritical model and the expressions of the main caracteristics, we implement the deisgn tools presented in ADS. In this section we also present the opto-microwave components models. Using this tools, we design three photoreceiver with low noise and high dynamics. This photoreceiver's aims to reach 300 Ohms of transimpedance and 5pA/Hz of noise. This circuits are implemented in ADS's eletrical fields and also in MOMENTUM's fields. All of this circuits appears as a competitive one in terms of noise at 3GHz .From the photoreceiver's design, we realized some cicuirts which permit photoreceiver's caracterization in 2.9 GHz - 3.4 GHz bandwidth. This measurements validate our approach and confirm a competitive circuit in term of noise compare to litterature. In a final sectin of this work, we illustrate an extension of this approach on other technologies. We also highlight a design of a photoreceiver at 20 GHz. In the end, we suggest the using of an active inductor to realize switchable frequency photoreceiver in low frequency