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- W3100803995 abstract "We examine a silicon-germanium heterojunction bipolar transistor (HBT) for cryogenic pre-amplification of a single electron transistor (SET). The SET current modulates the base current of the HBT directly. The HBT-SET circuit is immersed in liquid helium, and its frequency response from low frequency to several MHz is measured. The current gain and the noise spectrum with the HBT result in a signal-to-noise-ratio (SNR) that is a factor of 10–100 larger than without the HBT at lower frequencies. The transition frequency defined by SNR = 1 has been extended by as much as a factor of 10 compared to without the HBT amplification. The power dissipated by the HBT cryogenic pre-amplifier is approximately 5 nW to 5 μW for the investigated range of operation. The circuit is also operated in a single electron charge read-out configuration in the time-domain as a proof-of-principle demonstration of the amplification approach for single spin read-out." @default.
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- W3100803995 date "2015-05-18" @default.
- W3100803995 modified "2023-09-26" @default.
- W3100803995 title "Cryogenic preamplification of a single-electron-transistor using a silicon-germanium heterojunction-bipolar-transistor" @default.
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- W3100803995 doi "https://doi.org/10.1063/1.4921308" @default.
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