Noise properties of the Bloch oscillating transistor

René Lindell, Pertti Hakonen

Research output: Contribution to journalArticleScientificpeer-review

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We have measured the current noise spectral density of the Bloch oscillating transistor as a function of current gain. We find, as expected from theory and simulations, that the equivalent input noise that shows up in the output is less than the shot noise of the normal-insulating-superconductor tunnel junction (base junction). At the optimal operating point we find a reduced input current noise of 1.0fA/Hz⎯⎯⎯⎯⎯√ and a corresponding noise temperature of 0.4 K. The differential current gain at the same point is as large as 30 and the power gain amounts to 35.
Original languageEnglish
Article number173507
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number17
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed


  • Bloch oscillating transistor (BOT)


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