Systematic realisation of inductorless and resistorless Chua’s chaotic oscillator using VDGA

Choubey, Chandan Kumar; Paul, Sajal K.

doi:10.1080/00207217.2022.2068200

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…(d) A factor β amplifies the VZ voltage at the Z terminal and emerges at the W terminal. A possible symbolic implementation of a VDGA using three OTAs is shown in Figure 2 [39].…”

Section: Discussion On Vdgamentioning

confidence: 99%

Systematic Realization of VDGA-Based Comb Filter for Biomedical Signal Processing

Banarjee,

Pathak,

Sarkar

et al. 2024

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This research article presents the systematic development of a current-mode-based active comb filter designed to mitigate the undesirable PLI (power line interference) and its harmonics contaminating biomedical signals. The filter is designed using the latest currentmode Analog Building Block (ABB), specifically Voltage Differencing Gain Amplifiers (VDGA). This filter effectively suppresses the 50Hz PLI and reduces the odd consecutive harmonics of the 50Hz PLI, including the third harmonic at 150Hz, the fifth harmonic at 250Hz, and the seventh harmonic at 350Hz. In this design, we employ 'n' VDGAs as active components and '2n' capacitors as passive components to suppress 'n' frequencies. The active and passive components used in this filter are significantly fewer in number compared to similar filter designs in existing literature. Moreover, the filter can be electronically tuned for a specific pole frequency and quality factor value using the VDGA's bias currents. It's important to note that the pole frequency and the quality factor can be independently tuned owing to their orthogonal relationship. In simulation, the proposed filter demonstrates a notch depth of -42.9dB and a total harmonic distortion (THD) of -83dB, indicating its effectiveness in attenuating the pole frequency. The filter's design is simulated using a 0.18µm CMOS process technology and the macro-model of the MAX435 IC in the PSPICE simulator to validate its functionality and feasibility. Furthermore, a non-ideal analysis of the filter's performance has been conducted, considering real VDGAs exhibiting nonidealities such as transconductance gain errors and parasitics on their ports. Finally, the overall performance of this filter is compared based on various parameters, including the technology used, the number of active and passive components, supply voltage, the number of pole frequencies attenuated, notch depth, and THD, in comparison with existing comb and notch filters in the literature. The filter's performance and simplicity make it a promising choice in demanding biomedical detection systems.

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“…(d) A factor β amplifies the VZ voltage at the Z terminal and emerges at the W terminal. A possible symbolic implementation of a VDGA using three OTAs is shown in Figure 2 [39].…”

Section: Discussion On Vdgamentioning

confidence: 99%

Systematic Realization of VDGA-Based Comb Filter for Biomedical Signal Processing

Banarjee,

Pathak,

Sarkar

et al. 2024

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“…Due to the inherent properties of current mode circuits, including lower power consumption, wider bandwidth, higher dynamic range, and simpler architecture, several current mode blocks have gained prominence in designing various analog signal processing and generating circuits. These include second-generation current conveyor (CCII) [10] , voltage differencing transconductance amplifier (VDTA) [11] , differential difference current conveyor (DDCC) [12] , voltage differencing gain amplifier (VDGA) [13] , multiple output current differencing transconductance amplifier (MOCDTA) [14] , and voltage differencing current conveyor (VDCC) [15 , 16] . The VDCC is particularly noteworthy for its ability to offer electronically adjustable transconductance gain and facilitate the concurrent current and voltage transfer across its terminals.…”

Section: Methods Detailsmentioning

confidence: 99%

Design method for VDCC-based analog comb filter for power line interference cancellation

Choubey,

Kumar,

Pippal

2024

MethodsX

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“…where δ is the relative damping factor and ω n is the undamped natural frequency. In this manner, ( 12) can be re-ordered as given in (14).…”

Section: Mosfet W/l [µM] Kω Pfmentioning

confidence: 99%

“…[13], which uses a single extra-X current-controlled current conveyor; ref. [14], which uses a voltage differencing gain amplifier; ref. [15], which uses cross-coupled inverter rings; and [16], which uses operational amplifiers and multipliers.…”

Section: Introductionmentioning

confidence: 99%

CMOS Design of Chaotic Systems Using Biquadratic OTA-C Filters

Juarez-Mendoza,

del Angel-Diaz,

Diaz-Sanchez

et al. 2024

JLPEA

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This manuscript shows the CMOS design of Lorenz systems using operational transconductance amplifiers (OTAs). Two Lorenz systems are then synchronized in a master–slave topology and used to implement a CMOS secure communication system. The contribution is devoted to the correct design of first- and second-order OTA-C filters, using 180 nm CMOS technology, to guarantee chaotic behavior. First, Simulink is used to simulate a secure communication system using two Lorenz systems connected in a master–slave topology, which is tested using sinusoidal signals that are masked by chaotic signals. Second, the Lorenz systems are scaled to have amplitudes of the state variables below 1 Volt, to allow for CMOS design using OTA-C filters. The transconductances of the OTAs are tuned to accomplish a Laplace transfer function. In this manner, this work highlights the design of a second-order CMOS OTA-C filter, whose damping factor is tuned to generate appropriate chaotic behavior. Finally, chaotic masking is performed by designing a whole CMOS secure communication system by using OTA-C based Lorenz systems, and its SPICE simulation results show its appropriateness for hardware security applications.

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Systematic realisation of inductorless and resistorless Chua’s chaotic oscillator using VDGA

Cited by 7 publications

References 19 publications

Systematic Realization of VDGA-Based Comb Filter for Biomedical Signal Processing

Systematic Realization of VDGA-Based Comb Filter for Biomedical Signal Processing

Design method for VDCC-based analog comb filter for power line interference cancellation

CMOS Design of Chaotic Systems Using Biquadratic OTA-C Filters

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