- 著者
- Yatabe Zenji Muramatsu Toru Asubar Joel T. Kasai Seiya
- 出版者
- Elsevier
- 雑誌
- Physics Letters A (ISSN:03759601)
- 巻号頁・発行日
- vol.379, no.7, pp.738-742, 2015-03-20
- 被引用文献数
- 3
A novel method is presented for obtaining the distribution function of relaxation times G(tau) from power spectrum 1/f(alpha) (1 <= alpha <= 2). It is derived using McWhorter model and its inverse Stieltjes transform. Unlike the pre-assumed conventional g(tau) distribution, the extracted G(tau) has a peak whose width increases as the slope of the power spectrum alpha decreases. The peak position determines the dominant time constant of the system. Our method is unique because the distribution function is directly extracted from the measured power spectrum. We then demonstrate the validity of this method in the analysis of noise in transistor.
- 著者
- Kasai Seiya Ichiki Akihisa Tadokoro Yukihiro
- 出版者
- IOP Publishing
- 雑誌
- Applied Physics Express (APEX) (ISSN:18820778)
- 巻号頁・発行日
- vol.11, no.3, pp.037301, 2018-03
- 被引用文献数
- 8
A bistable system efficiently detects a weak signal by adding noise, which is referred to as stochastic resonance. A previous theory deals with friction in state transition; however, this hypothesis is inadequate when friction force is negligible such as in nano-and molecular-scale systems. We show that, when the transition occurs without friction, the sensitivity of the bistable system to a Gaussian-noise-imposed weak signal becomes significantly high. The sensitivity is determined by the relative difference in noise distribution function. We find that the relative difference in Gaussian distribution function diverges in its tail edge, resulting in a high sensitivity in the present system. (C) 2018 The Japan Society of Applied Physics