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Your search keyword '"Ranjan, Rajeev"' showing total 113 results
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113 results on '"Ranjan, Rajeev"'

1. A Compact Electronically Tunable Meminductor Emulator Model and Its Application.

Author

Sharma, Pankaj Kumar, Ranjan, Rajeev Kumar, and Kang, Sung-Mo

Abstract

A compact MOSFET-C floating/grounded meminductor emulator (MIE) model is presented for high operating frequency and low power operation. The proposed MIE uses only 22 MOSFETs and two capacitors. Its performance is theoretically analyzed and rigorously verified using the Cadence Virtuoso software and hardware prototypes. The proposed MIE operates appropriately for a wide range of frequencies up to 5 MHz with $590 \mu \text{W}$ power consumption at a 180nm CMOS technology node and manifests important signature properties. The MIE layout area in 180 nm CMOS technology is $13107.5 \mu \text{m}^{2}$. To analyze the effects of statistical variations in MIE elements, extensive Monte Carlo simulations have been performed to demonstrate the robustness of the proposed MIE. For experimental validation, hardware prototypes have been developed and tested successfully. An MIE-based adaptive learning neuromorphic circuit is presented to show that it can mimic the behavioral responses of amoeba under varying environments such as temperature. [ABSTRACT FROM AUTHOR]

Published
2024
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6. 0.5 V Multiple-Input Multiple-Output Differential Difference Transconductance Amplifier and Its Applications to Shadow Filter and Oscillator

Author

Khateb, Fabian, Kumngern, Montree, Kulej, Tomasz, Kumar Ranjan, Rajeev, Khateb, Fabian, Kumngern, Montree, Kulej, Tomasz, and Kumar Ranjan, Rajeev

Abstract

This paper presents new applications of low-voltage and low-power multiple-input multiple output differential difference transconductance amplifier (DDTA). The multiple-input bulk-driven MOS transistor (MIBD MOST) technique provides multiple-input of the active device that simplifies the application ' s topology and reduces its power consumption. The proposed DDTA has been used to realize multiple-input single-output shadow filter. Both voltage-and transimpedance-mode filtering functions can be obtained. The natural frequency and the quality factor of the shadow filter can be independently and electronically controlled using DDTA-based amplifiers. The proposed shadow filter has been modified to work as a shadow oscillator. The condition and frequency of oscillation can be controlled independently and electronically. The DDTA is capable to work with 0.5V supply voltage and consumes 218.2 nW. The applications have been designed and simulated in Cadence using 0.18 mu m TSMC CMOS technology.

Published
2023

19. Mem-Elements Emulator Design With Experimental Validation and Its Application

Author

Raj, Niranjan, Kumar Ranjan, Rajeev, Khateb, Fabian, Kumngern, Montree, Raj, Niranjan, Kumar Ranjan, Rajeev, Khateb, Fabian, and Kumngern, Montree

Abstract

An emulator circuit of Memristor, Memcapacitor, and Meminductor commonly termed as mem-elements has been demonstrated in this article. The circuit has been realized using the technique of current mode, which provides better performance over voltage mode counterparts. The current mode analog building blocks, along with a few passive components, have been used in the presented circuit implementation. The fingerprint characteristics have been observed in both simulation and experimental results, validating the theoretical analysis. The robustness of the presented design has been supported by performing different types of analysis like process corner, temperature, and non-volatility behavior. The mem-elements emulator design has been simulated using 0.18 mu m TSMC process parameter, and +/- 1.2 V power supply has been used. The commercial ICs AD844 and CA3080 are used for the experimental demonstration of the proposed mem-elements design by making a prototype on a breadboard. A layout area of 4829 mu m(2), 8098 mu m(2), and 8061 mu m(2) respectively is required for the Memristor, Memcapacitor, and meminductor circuit. The power consumed by the mem-elements circuit is also provided. A chaotic has been implemented using mem-elements to show the usefulness of the emulator design.

Published
2021

21. Electronically Tunable Flux-Controlled Resistorless Memristor Emulator.

Author

Sagar, Raj, Niranjan, Verma, Vijay Kumar, and Ranjan, Rajeev Kumar

Subjects
MATHEMATICAL analysis, SWITCHING circuits, CAPACITORS, VOLTAGE, INTEGRATED circuits
Abstract

This article demonstrates a voltage differencing inverting buffered amplifier (VDIBA)-based resistorless flux-controlled memristor emulator circuit with tunability. Two VDIBA blocks serve as active components, and a grounded capacitor serving as a passive part. The proposed emulator design is devoid of multipliers and resistors through effective utilization of port relationships. Including tunability, the suggested emulator functions in both incremental and decremental modes. It accurately depicts the attributes of an ideal memristor up to 12.7 MHz and consumes a total power of 1.34 mW. The mathematical analysis is substantiated through Cadence simulation in 0.18- $\mu \text{m}$ Taiwan Semiconductor Manufacturing Company (TSMC) technology with the supply voltage of ±1 V. Nonideal, single/parallel, Monte-Carlo sampling and corner analysis were conducted to confirm circuit resilience. The nonvolatile nature of the presented emulator model has also been included. A breadboard prototype incorporating the ICs CA3080 and LT1193 are built to conduct an experimental demonstration. The experimental findings were consistent with the theoretical expectations and simulation results. [ABSTRACT FROM AUTHOR]

Published
2022
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25. Charged Controlled Mem-Element Emulator and Its Application in a Chaotic System

Author

Kumar Sharma, Pankaj, Kumar Ranjan, Rajeev, Khateb, Fabian, Kumngern, Montree, Kumar Sharma, Pankaj, Kumar Ranjan, Rajeev, Khateb, Fabian, and Kumngern, Montree

Abstract

This article proposes a charged controlled emulator model for memristor and memcapacitor using second-generation Current Conveyor (CCIIs) and Analog Multiplier (AM). The grounded and floating mem-element circuits have been designed using two CCIIs and one multiplier in addition to some passive components. The grounded type of design requires three resistors and three capacitors while floating design necessitates only two resistors and two capacitors. With the help of a switch, the proposed design can be easily switched into a memristor or memcapacitor. The proposed emulator model has been theoretically analyzed and simulated in PSpice to substantiate the effectiveness and accuracy. The practicability of the circuit has been established using commercially available ICs AD844AN and AD633JN. Non-linear characteristics of the proposed memristor emulator have been used to design a chaotic system.

Published
2020

26. 0.5 V Fully Differential Universal Filter Based on Multiple Input OTAs

Author

Jaikla, Winai, Khateb, Fabian, Kumngern, Montree, Kulej, Tomasz, Kumar Ranjan, Rajeev, Suwanjan, Peerawut, Jaikla, Winai, Khateb, Fabian, Kumngern, Montree, Kulej, Tomasz, Kumar Ranjan, Rajeev, and Suwanjan, Peerawut

Abstract

The design of a low-power, low-voltage, fully-differential universal biquad filter is presented in this work, which is constructed from four multiple-input gate-driven operational transconductance amplifiers (MI-OTAs) along with one passive resistor and two passive capacitors. The scheme of presented biquad filter has three high-input impedance voltage nodes and single output voltage node. Five unity gain filtering functions, all-pass (AP), low-pass (LP), band-pass (BP), high-pass (HP) and band-stop (BS) responses, are obtained. The selection of output filtering responses is obtained without the need of component matching condition, inverting or double input voltage. With this feature, it can be easily controlled with digital programming. The quality factor (Q) and angular frequency (omega(0)) are electronically and independently tuned. Moreover, the adjustment of omega(0) and Q can be done without affecting the voltage gain. A workability of the design is confirmed via Cadence software and the Spectre simulator based on the 180 nm TSMC CMOS technology parameters. The proposed fully differential filter operates with 0.5 V supply voltage. The results verify that the proposed filter dissipates the total power of 53.3 nW. Additionally, the dynamic range (DR) of band-pass filtering function is 63 dB for 2% third intermodulation distortion (IMD). Also, the simulated RMS value of the band-pass filtering noise is 45 mu V.

Published
2020

32. Flux-Controlled Memristor Emulator and Its Experimental Results.

Author

Raj, Niranjan, Ranjan, Rajeev Kumar, and Khateb, Fabian

Subjects
MONTE Carlo method, CURRENT conveyors, OPERATIONAL amplifiers, HIGHPASS electric filters, ELECTRONIC equipment, HYSTERESIS loop
Abstract

A flux-controlled memristor emulator built with off-the-shelf electronic devices and based on a TiO2 model is presented in this article. The circuit proposed in this article uses the current mode approach based analog building blocks such as a second-generation current conveyor (CCII) and an operational transconductance amplifier (OTA) as an active element with few passive elements. The circuit shows a clear fingerprint of an ideal memristor. The offered emulator circuit can be made to operate in incremental and decremental modes and functions well up to 26.3 MHz. Nonvolatility, Monte Carlo sampling, and corner analysis simulations are executed to verify the robustness of the circuit. The functional verification of the presented circuit is performed using the 0.18- $\mu \text{m}$ CMOS parameter at a supply voltage of ±1.2 V. The experimental demonstration is carried out by making a prototype on a breadboard using ICs AD844AN and CA3080, which exhibits a good agreement with theoretical and simulation results. The layout of the circuit, which requires a total chip area of $75\times 70\,\,\mu \text{m}^{2}$ , is also created. Single/parallel combinations of a memristor, a high-pass filter, and a chaotic system are presented to demonstrate its application. [ABSTRACT FROM AUTHOR]

Published
2020
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34. Stimulated Raman Imaging of Lipids Droplets

Author

Ferrara, Maria Antonietta, primary, Filograna, Angela, additional, D'Arco, Annalisa, additional, Ranjan, Rajeev, additional, Valente, Carmen, additional, Larobina, Michele, additional, and Sirleto, Luigi, additional

Published
2018
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