Abstract
We examine a Bloch oscillating transistor pair as a differential stage for cryogenic low-noise measurements. Using two oppositely biased, nearly symmetric Bloch oscillating transistors, we measured the sum and difference signals in the current gain and transconductance modes while changing the common mode signal, either voltage or current. From the common mode rejection ratio we find values ~20 dB even under non-optimal conditions. We also characterize the noise properties and obtain excellent noise performance for measurements having source impedances in the MΩ range.
Original language | English |
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Article number | 065009 |
Number of pages | 4 |
Journal | Superconductor Science and Technology |
Volume | 26 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2013 |
MoE publication type | A1 Journal article-refereed |