13 research outputs found
Design and Analysis of Mem-elements Emulator using Analog Building Blocks
No full textThe evolution of electronic components has led to the discovery of various mem-elements,
including memristors, memcapacitors, and meminductors, which exhibit memory-dependent
behavior. These elements are poised to revolutionize many fields of science and engineering.
However, fabricating these devices at the nanoscale remains a significant challenge, thereby
creating a demand for mem-element emulators to facilitate experimental research and circuit
design. Earlier, electronic systems relied on fundamental components like resistors, capacitors,
and inductors alongside semiconductor devices. Even while these conventional components
are essential, they are not very flexible in responding to changing environmental conditions.
Mem-elements overcome these limitations and potentially revolutionize the industry by
enhancing circuit design, functionality, and efficiency. Therefore, researchers and practicing
engineers use emulation techniques to replicate mem-element functionality, allowing engineers
to study their behavior without needing physical prototypes. This thesis presents the
development of a versatile mem-element emulator capable of reproducing mem-elements’
behavior, including memristors and meminductors. This work lays the groundwork for further
exploration of mem-elements in future electronic systems and provides a platform for
simulating their diverse functionalities.
In the thesis, six designs of mem-element emulators have been presented, including three for
memristors and another three for meminductors. These circuits utilize analog building blocks
such as operational transconductance amplifiers (OTAs), current differencing buffered
amplifiers (CDBAs), voltage differencing gain amplifiers (VDGAs), fully-balanced voltage
differencing buffered amplifiers (FB-VDBAs), and voltage differencing transconductance
amplifiers (VDTAs). The first memristor emulator is designed using OTA and CDBA. The
second memristor emulator employs VDGA, whereas the third memristor emulator is designed
using FB-VDBA. These designs feature a grounded capacitor as a memory element and achieve
grounded and floating configurations with incremental and decremental topologies. In addition,
the first meminductor emulator is designed using two OTAs. The second meminductor
emulator has been designed using VDGA, while the third meminductor emulator is designed
using a VDTA. In all designs of meminductor emulators, CDBA has been utilized to obtain
incremental and decremental topologies. One of the capacitors is used as a memory element,
while the other is used to form the inductance.
The emulator’s performance is thoroughly analyzed through pinched hysteresis loops, non-
volatility tests, temperature analyses, Monte Carlo analyses, etc. These analyses confirm the efficacy of proposed emulator designs in natural environments. The emulators also offer the
feature of electronic tunability, often required to adjust the internal parameters of the circuit.
These emulators display pinched hysteresis loops across a broad frequency range (hundreds of
Hz to MHz). Both memristor and meminductor emulators present promising results that offer
a wide range of memristances and meminductances. The memristor emulators have been used
in the design of analog filters, while meminductor emulators are used in adaptive learning and
chaotic circuits, demonstrating satisfactory performance. Non-ideal analyses have also been
conducted to verify their performance in the natural environment. The simulation results have
been obtained using Eldo simulation tools for 180 nm CMOS technology parameters
Comment: Multifunction Current Differencing Cascaded Transconductance Amplifier (MCDTA) and Its Application to Current-Mode Multiphase Sinusoidal Oscillator
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CMOS Mutator Circuits based on VD-DIBA for Realization of Meminductor/Memcapacitor and its Application
No full text371-381In this research, meminductor and memcapacitor mutators have been introduced by utilizing voltage differencing
differential input buffered amplifier in conjunction with a memristor and one capacitor. Notably, the memristor integrated
into the proposed design is composed solely of transistors and a capacitor. It is asserted that CMOS-based memristors offer
substantial advantages over their counterparts constructed from active blocks, as commonly found in existing literature,
particularly in terms of integration, compatibility, power efficiency, reliability, and cost-effectiveness. The memcapacitor
mutator can be easily derived from the meminductor mutator and vice versa by swapping the positions of the capacitor and
memristor. Simulation of the proposed designs is carried out with the help of LTSPICE tool with TSMC 180nm CMOS
technology parameters. The results obtained demonstrate that these designs exhibit commendable performance
characteristics across a wide spectrum of frequencies, and notably, they successfully withstand scrutiny under the nonvolatility
test. Additionally, adaptive learning circuit is designed using the proposed mutator to corroborate the effectiveness
of the design
Resistively compensated and SSF based VDBA offering high GBW and its application as a biquad filter
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An Electronically Tunable Floating Meminductor Emulator Based on VDDDA and Its Application
No full textThis paper introduces a floating flux-controlled meminductor emulator, implemented using two voltage differencing differential difference amplifier (VDDDA) along with a memristor and capacitor. Grounded and floating configurations are simulated with TSMC 0.18 µm level-49 BSIM3 CMOS process parameters in LTspice, showcasing the performance of the proposed circuits. The circuit features electronic tunability, allowing for the adjustment of nonlinear flux through the tuning of bias voltage. Simulation results validate the frequency-dependent current-flux dynamics of the proposed meminductor emulator. The simulation results, which involve frequency-dependent pinched hysteresis loops, transient analysis, non-volatility, and Monte Carlo analysis of the proposed meminductor, affirm the functionality and adequacy of the proposed design. A Chua’s oscillator is realized using proposed VDDDA-based meminductor as non-linear element
New Modified Voltage Differencing Voltage Transconductance Amplifier (MVDVTA) based Meminductor Emulator and its Applications
No full text239-246This paper presents a new modified voltage differencing voltage transconductance amplifier (MVDVTA) based
meminductor emulator circuit. The proposed emulator circuit is memristor-less, uses only a single active building block
(ABB) and has simple circuitry. The MVDVTA based emulator design consists of only two capacitors and a single resistor.
The performance of the proposed design has been verified over a wide frequency span. For simulation purpose LTSpice tool
is used with 0.18μm CMOS technology. The proposed emulator has also been employed in chaotic oscillator and adaptive
learning application circuit to verify its workability. The proposed design gives satisfactory performance for both the
applications, hence confirming its functionality in practical environment
Low temperature coefficient and low line sensitivity subthreshold curvature‐compensated voltage reference
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