Practical Memristor Emulator Circuit Development Techniques for Analog Applications
Abstract
Emerging memristor technology is drawing widespread attention during recent
time due to its potential diverse applications in nanoelectronic memories, logic and neu
romorphic computer architectures, digital and analog modulations system, and oscillator
circuits. There has been a surge of interest to study memristor. However, as of now
there is no single device available in the market that can truly exhibit the memristive be
havior for a certain frequency range. Due to the absence of a real fabricated memristor,
researchers are still relying on the memristor emulators to investigate the behavior and
applications of memristor. Memristor emulator circuits are intended to understand and
mimic the perceived behavior and properties of memristor. In addition, memristor has
recently been recognized as a new and the fourth passive element that has the potential
for many applications in digital, analog, and mixed signal domains.
In the absence of a physical memristor, these emulator circuits would be of great
importance to understand the fundamental concepts and potential applications related to
memristor,becausetheseemulatorcircuitscanbebuiltinthelaboratoryusinginexpensive
off-the-shelf circuit components. One of the most widely used ideal memristor models
developedbytheHPLabdoesnotfittheanticipatednonlinearbehaviorofarealmemris
tor. Therefore, this dissertation has proposed generic and practical emulator circuits for
a current-controlled and voltage-controlled memristor, which can be used to mimic the
behavior of the well-known memristor models like-Simmons Tunneling Barrier Model
(STBM), ThrEshold Adaptive Memristor (TEAM) Model, and Voltage ThrEshold Adap
tive Memristor (VTEAM) in addition to the simple Hewlett Packard (HP) model. Prior
emulators can only emulate the linear electrical behavior.
Moreover, the proposed emulator circuit development techniques can be config
ured for both floating and grounded models. In addition to the mathematical modeling
and analysis of the proposed emulator, we provide SPICE simulation and experimental
results. The analytical observations and the experimental results show that the proposed
circuits can mimic the nonlinear behavior of real memristors for certain frequency range.
Furthermore, the proposed emulator has been used to verify some applications like Wien
bridge oscillator. Both series and parallel connectivity of the proposed emulator circuits
have been studied experimentally. Finally, a brief comparison with the previously pub
lished emulators is presented to highlight the advantages of the proposed design.
Table of Contents
Introduction -- Memristor models and emulators: a literature review -- A generic and practical Memristor Emulator for current-controlled models -- Simple current-controlled Memristive emulators -- Generic Memristor Emulators for voltage-controlled models -- Simple flux-controlled Memristive Emulators -- Conclusion and future work
Degree
Ph.D.