Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 129-133 |
| Number of pages | 4 |
| Journal | Cryogenics |
| Volume | 57 |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- low-noice apmplifier
- SIGe transistors
- SQUID readout
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Fully differential cryogenic transistor amplifier. / Beev, Nikolay (Corresponding Author); Kiviranta, Mikko.
In: Cryogenics, Vol. 57, 2013, p. 129-133.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Fully differential cryogenic transistor amplifier
AU - Beev, Nikolay
AU - Kiviranta, Mikko
PY - 2013
Y1 - 2013
N2 - We have constructed a dc-coupled differential amplifier capable of operating in the 4.2 K–300 K temperature range. The amplifier can be operated at high-bias setting, where it dissipates 5 mW, has noise temperature TN ≈ 0.7 K at RS ≈ 5 kΩ and >40 MHz bandwidth at 4.2 K bath temperature. The bias setting can be adjusted: at our lowest tested setting the amplifier dissipates <100 μW, has noise temperature TN ≈ 2 K at RS ≈ 25 kΩ and >2 MHz bandwidth. The 1/f noise corner frequency is a few times 10 kHz. We foresee the amplifier to have an application in the readout of Superconducting Quantum Interference Devices (SQUIDs), Superconducting Tunnel Junction Detectors (STJs) and Transition Edge Sensors (TESes). We have verified the practical use of the amplifier by reading out a 4.2 K 480-SQUID array with 40 MHz bandwidth and <8 × 10−8 Φ0/Hz1/2 flux noise.
AB - We have constructed a dc-coupled differential amplifier capable of operating in the 4.2 K–300 K temperature range. The amplifier can be operated at high-bias setting, where it dissipates 5 mW, has noise temperature TN ≈ 0.7 K at RS ≈ 5 kΩ and >40 MHz bandwidth at 4.2 K bath temperature. The bias setting can be adjusted: at our lowest tested setting the amplifier dissipates <100 μW, has noise temperature TN ≈ 2 K at RS ≈ 25 kΩ and >2 MHz bandwidth. The 1/f noise corner frequency is a few times 10 kHz. We foresee the amplifier to have an application in the readout of Superconducting Quantum Interference Devices (SQUIDs), Superconducting Tunnel Junction Detectors (STJs) and Transition Edge Sensors (TESes). We have verified the practical use of the amplifier by reading out a 4.2 K 480-SQUID array with 40 MHz bandwidth and <8 × 10−8 Φ0/Hz1/2 flux noise.
KW - low-noice apmplifier
KW - SIGe transistors
KW - SQUID readout
U2 - 10.1016/j.cryogenics.2013.06.004
DO - 10.1016/j.cryogenics.2013.06.004
M3 - Article
VL - 57
SP - 129
EP - 133
JO - Cryogenics
JF - Cryogenics
SN - 0011-2275
ER -