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Reduction of discrete-dopant-induced high-frequency characteristic fluctuations in nanoscale CMOS circuit

As the dimension of semiconductor device shrunk into nanoscale, characteristic fluctuation is more pronounced, and become crucial for circuit design. Diverse approaches have been reported to investigate and suppress the random-dopant-induced fluctuations in devices. However, attention is seldom drawn to the existence of high-frequency characteristic fluctuations of active device. In this paper, intrinsic high-frequency characteristic fluctuations of the nanoscale MOSFET circuit induced by random dopants are intensively explored using an experimentally validated simulation methodology, where fluctuation suppression technique is further examined. The circuit gain, the 3 db bandwidth and the unity-gain bandwidth of the tested circuit are estimated concurrently capturing the discrete-dopant-number-and discrete-dopant-position-induced fluctuations. This study provides an insight into discrete-dopant-induced intrinsic high-frequency characteristic fluctuations and examines the potential fluctuation suppression technique for nanoscale transistor circuit.