What we did not know is if it could do both at the same time, which is needed for Europa surface missions. Product Details Features 110 GHz f T silicon germanium technology High maximum power gain 18.5 dB at 5.8 GHz Low noise high gain microwave transistor Noise figure (NF) 0.8 dB at 5. Silicon (Si) bipolar transistor technology, despite its desirable features of fast switching speed, high transconductance, and excellent current-drive. And we know it remains functional at cold temperatures. The earliest Silicon Fuzz Faces were quite distinct from the original NKT275 Germanium variety - being more strident and aggressive - and utilising BC108C and BC109C transistors, the third variety to be utilised was the BC183L which sounded a lot more like the warmer Germanium. We know SiGe can survive high levels of radiation. "It's actually developing electronics for NASA to use on Europa. "It's not just doing the basic science and proving that SiGe works," said Dr. Their goal is to develop the electronics infrastructure for upcoming surface missions to Europa, such as the Europa Lander, which is slated to be a follow-on mission to Europa Clipper, currently scheduled for launch in 2024. The study is being funded by a three-year grant in the NASA Concepts for Ocean Worlds Life Detection Technology (COLDTech), and the research team is currently in year one of the project. SiGe allows CMOS logic to be integrated with heterojunction bipolar transistors, making it suitable for mixed-signal integrated circuits. The forward bias voltage of silicon is 500 to 700mV, which is much higher and more difficult for a guitar to activate. For Class-A operation, germanium devices require a no-signal bias of 0.3 volt. "You can build it for what you want it to do on Earth, and you then can use it in space."
Cressler, who is the project investigator, and a co-author on the study. "Due to the way that they're made, these devices actually survive those extreme conditions without any changes made to the underlying technology itself," said Dr. Cressler, who is a Regents’ Professor in the School of Electrical and Computer Engineering (ECE) at Georgia Tech, has been working with SiGe HBTs for the decades with his students and has discovered that they harbor distinctive advantages regarding extreme environments such as Europa.
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