A Memristor Emulation in 180-nm CMOS Process for Spiking Signal Generation and Chaos Application

We present a new CMOS circuit and its successful fabrication of an operational transconductance amplifier (OTA)-CMOS inverter-based memristor emulator and investigate its switching behavior from 5 MHz to 50 MHz. It could be considered the first memristor emulator based on a current mode circuit and...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2024-04, Vol.71 (4), p.1757-1770
Main Authors: Kumar, Prashant, Ranjan, Rajeev Kumar, Kang, Sung-Mo
Format: Article
Language:English
Subjects:
chaos
Circuit design
CMOS
Emulators
Frequency response
Inverters
Logic gates
memristor emulator
memristor emulator fabrication
Memristors
MIF neuron
Neurons
Object recognition
Operational amplifiers
OTA
Power consumption
Signal generation
Spiking
Topology
Transconductance
Transistors
Voltage
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Summary:We present a new CMOS circuit and its successful fabrication of an operational transconductance amplifier (OTA)-CMOS inverter-based memristor emulator and investigate its switching behavior from 5 MHz to 50 MHz. It could be considered the first memristor emulator based on a current mode circuit and an inverter. Primarily, the transconductance of the inverter stage transforms the bias-voltage-dependent transconductance of the OTA into an overall flux-dependent memductance of the memristor. We also demonstrate how performance measures such as frequency response, noise, post-layout simulation, and process corners impact the memristive behavior of the design. The power consumption of the proposed memristor emulator is 2.25 mW. The aforementioned power figure is based on a 1.8 V power supply and calculated on a UMC 180-nm CMOS technology node. Further, using this memristor emulator, we implement a CMOS circuit for spiking signal generation called the Memristive Integrate-and-Fire (MIF) neuron circuit that mimics a biological neuron. As far as we know, a spiking signal generation using a memristor emulator remains unreported. Later on, we went on to realize a MIF neuron based object detection application to bring out the practical significance of the MIF neuron circuit. We have fabricated a chip of the proposed memristor emulator design with the die size of L= 1499.96~\mu \text{m} , W= 1499.96~\mu \text{m} , and included its fabrication result to validate the theoretical derivations in the work. At last, we perform an experimental realization of a chaos circuit application with the help of the fabricated chip.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2023.3348695