IBM researchers built a graphene (GFET) based radio frequency receiver IC which they say is the world's most advanced IC ever made of graphene - in fact it offers 10,000 times better performance and any previously reported effort.

GFET radio frequency receiver IC (IBM)

IBM's circuit consists of three graphene transistors, four inductors, two capacitors, and two resistors. All circuit components are fully integrated into a 0.6 mm2 area and fabricated in a 200 mm silicon production line. The researchers say that those the circuits consume less than 20 mW power to operate, while also demonstrating the highest conversion gain of any graphene RF circuits at multiple GHz frequency.

IBM already built an analog graphene integrated circuit with a broadband frequency mixer in a 2011, but that device suffered from poor performance due to harsh fabrication processes. For this new IC, the research team completely reversed the conventional silicon integrated circuit fabrication flow, leaving graphene transistors as the last step of integrated circuit fabrication. This resulted in preserving graphene device performance.

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Versarien - Think you know graphene? Think again! Versarien - Think you know graphene? Think again!