Department of Physics and Astronomy and Smart State Center for Experimental Nanoscale Physics, University of South Carolina, Columbia, South Carolina 29208, USA.
CEMS, RIKEN, Saitama 351-0198, Japan.
Sci Rep. 2016 May 20;6:26155. doi: 10.1038/srep26155.
Frequency generators are widely used in electronics. Here, we report the design and experimental realization of a memristive frequency generator employing a unique combination of only digital logic gates, a single-supply voltage and a realistic thresholdtype memristive device. In our circuit, the oscillator frequency and duty cycle are defined by the switching characteristics of the memristive device and external resistors. We demonstrate the circuit operation both experimentally, using a memristor emulator, and theoretically, using a model memristive device with threshold. Importantly, nanoscale realizations of memristive devices offer small-size alternatives to conventional quartz-based oscillators. In addition, the suggested approach can be used for mimicking some cyclic (Sisyphus) processes in nature, such as "dripping ants" or drops from leaky faucets.
频率发生器在电子学中得到了广泛的应用。在这里，我们报告了一种基于忆阻器的频率发生器的设计和实验实现，该发生器采用了独特的数字逻辑门组合、单电源电压和实际的阈值型忆阻器器件。在我们的电路中，振荡器的频率和占空比由忆阻器器件和外部电阻器的开关特性来定义。我们使用忆阻器模拟器进行了实验验证，同时使用具有阈值的模型忆阻器器件进行了理论验证。重要的是，忆阻器器件的纳米级实现为传统的基于石英的振荡器提供了小型化的替代方案。此外，所提出的方法可用于模拟自然界中的某些循环（西西弗斯）过程，例如“滴蚂蚁”或从漏水龙头滴下的水滴。
