The Symmetrized Memristor Relaxation Oscillator

 
Rakitin V.V. (IPPM RAS)
 
Abstract - The use of analog resistive elements with memory - memristors opens wide opportunities for the integrated implementation of promising devices and systems [1, 2]. These include various types of oscillators, which are a typical element in neuromorphic systems. Various types of memristor oscillators are described, in which non-linear and inertial properties of memristors are used [3-7]. Of particular interest are controlled relaxation oscillators, where the memristor replaces the traditional reactive elements and makes it possible to reduce the dimensions of the oscillators themselves [4, 5, 8]. A memristor is an asymmetric device and in some cases for symmetrization use counter-parallel and whether the back-sequential inclusion of memristors [5,6,8,9]. Symmetrization improves the parameters of the oscillators, reduces the requirements for the accuracy of the memristor parameters. It is proposed to symmetrize a memristor oscillator on a Schmidt trigger with a capacitor [10]. The principle of the action of the symmetrized memristor relaxation oscillator (SMO) is considered. It is built on the basis of the Schmitt trigger (TS), covered by negative current feedback, with a capacitor and two identical counter-parallel memristors at the input. The identity of memristors ensures the preservation of their total conductivity, which drastically changes the work of SMO and expands its functional capabilities. SMO has two modes: excited (generation) and inhibited with two levels of the output signal. The transition between modes occurs when input signals are applied to the potential and current inputs of the SMG. The analysis and simulation of the SMO operation in a wide range of input signals is performed. It is established that the duration of the transition from the excited state to the inhibited state depends on the amplitude of the braking pulse, and the final state from the polarity of the inhibition. This allows the conversion of analog signals at the input of the SMO into a binary code at the output. The levels of SMO output signals are suitable for controlling the inputs of possible to use it in various information processing devices, including a neuromorphic systems. SMO is an element with analog processing of information and a binary representation of output signals, which makes it possible to use it in various information processing devices and neuromorphic systems.

Keywords - memristor, memristor oscillator, symmetrized memristor oscillator, Schmitt trigger.

Симметризированный мемристорный релаксационный генератор

 
Ракитин В.В. (ФГУП "НИИФП им. Ф.В.Лукина", Институт проблем проектирования в микроэлектронике РАН, г. Москва)
 
Аннотация - Рассмотрен принцип действия симметризированного мемристорного релаксационного генератора на триггере Шмитта с конденсатором (СМГ). Выполнен анализ режимов его работы и способы управления ими. Приведена математическая модель СМГ. Приведены результаты моделирования СМГ, подтверждающие выводы анализа.

Ключевые слова - мемристор, мемристорные генераторы, симметризированный мемристорный генератор, триггер Шмитта.