Low-Cost Microwave Noise Source Exploiting a BJT with Junctions in Avalanche Regime

Other (2019)
Author(s)

Guendalina Simoncini (UniversitĂ  degli Studi di Perugia)

F. Alimenti

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DOI related publication
https://doi.org/10.1109/icecs46596.2019.8964981
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Publication Year
2019
Language
English
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Abstract

In this work the feasibility of a low-cost microwave noise source compatible with commercial BiCMOS technologies is discussed. The proposed circuit exploits the avalanche noise generated by the base-emitter junction of a Bipolar Junction Transistor (BJT) in reverse breakdown. The collector terminal is not used and thus it is left open. The feasibility study is carried out exploiting the BFP640 device, a packaged BJT realized with a f
T= 70 GHz process. A breakdown current of about 3 mA is obtained by reverse biasing the base-emitter junction at 4.5 V. In these conditions the Excess Noise Ratio (ENR) of the source is greater than 20 dB from 0.5 to 4.5 GHz.

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