Current-mode fractional-order shelving filters using MCFOA for acoustic applications

Sen, Fadile; KIRÇAY, Ali; Cobb, Buket Sonbas; Karci, Hasari

doi:10.1016/j.aeue.2023.154608

Cited by 4 publications

(9 citation statements)

References 13 publications

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“…The components of these trees can be derived through various techniques, including the continued fraction expansion method. Adhering to this methodology, numerous fractional-order circuits have been documented in the literature, employing diverse RC network topologies [74][75][76][77][78]. In this work, for the required fractional-order elements, that implement the fractional derivative and integral, the 5th order Cauer I form [73], is selected after simulating among various forms and addressing for the accuracy of the approximation along with their simplicity.…”

Section: Circuit Implementation 41 Fractional Order Circuitsmentioning

confidence: 99%

A Low Power Analog Integrated Fractional Order Type-2 Fuzzy PID Controller

Alimisis,

Eleftheriou,

Georgakilas

et al. 2024

Fractal Fract

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This paper introduces an analog integrated fractional order type-2 fuzzy PID control system. Current approaches frequently depend on energy-intensive embedded digital systems, consuming substantial energy levels ranging from a few μW to mW. To address this limitation we propose a fully analog design offering insights into the potential of analog circuits for powerefficient robust control in complex and uncertain environments. It consists of Gaussian function, min/max, Operational transcoductance amplifier circuits and Resistor-Capacitor networks for the implementation of the fractional-order components. Crafted for operation under a reduced voltage supply (0.6 V), the controller attains minimal power usage (861.8 nW), facilitating uninterrupted, extended-term functioning. Post-layout simulation results confirm the proper operation of the proposed design. The proposed system is designed and simulated using the Cadence IC Suite in a TSMC 90 nm CMOS process.

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Section: Circuit Implementation 41 Fractional Order Circuitsmentioning

confidence: 99%

A Low Power Analog Integrated Fractional Order Type-2 Fuzzy PID Controller

Alimisis,

Eleftheriou,

Georgakilas

et al. 2024

Fractal Fract

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“…Owing to the advantages provided by fractional-order calculus to analog filters, the design of shelving filters has also begun to incorporate fractional-order characteristics [22][23][24][25][26][27][28]. The most significant advantage that fractional-order calculus provides to equalization filters is the extra degree of freedom (α), allowing for a better listening experience in the ELLC standard by effectively utilizing the sound frequency [25]. Equation (12) presents the transfer function (H FO ) of fractional-order equalization filters in its most comprehensive perspective.…”

Section: Fractional-order Shelving Filtersmentioning

confidence: 99%

“…HP shelving filters, on the other hand, allow lower frequencies, including those below the predetermined cut-off frequency, to pass through while granting the researcher the capability to amplify or attenuate higher frequencies according to their preferences. This unique characteristic stands out as one of the most notable advantages of shelving filters [25].…”

Section: Introductionmentioning

confidence: 99%

“…The most recent contribution to this topic was presented by Sen et al (2023) [25]. CM, LP, and HP fractional-order shelving filters were designed using a modified current feedback operational amplifier (MCFOA) as an active filter element.…”

Section: Introductionmentioning

confidence: 99%

“…The CCCII element demonstrated better filter characteristics, including linearity, signal bandwidth, and dynamic range, in comparison to op-amp-based filters [22]. To further enhance these characteristics, the CCCII element was implemented using bipolar junction transistors (BJTs), as they are more suitable for CM and low-power/voltage applications [25]. Furthermore, it was noted that adjustments to the values of passive components within the circuit could alter the cut-off frequency and gain of the designed filter circuit.…”

Section: Introductionmentioning

confidence: 99%

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MO-CCCII-Based Single-Input Multi-Output (SIMO) Current-Mode Fractional-Order Universal and Shelving Filter

Sen,

Kircay,

Cobb

et al. 2024

Fractal Fract

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This study introduces an innovative filter topology capable of providing simultaneous positive and negative gain outputs for one-fractional order LP, with high-pass, all-pass, and fractional-order shelving filter responses. The circuit, utilizing multi-output second-generation current-controlled conveyors, stands out as the first to deliver ten outputs, incorporating both integer and fractional-order filter responses, without requiring additional components. Its current-mode design simplifies the process, employing minimal active and grounded passive elements, making it appropriate for low-voltage/low-power applications. The filter utilizes fifth-order Oustaloup approximation and Foster type-I RC networks for fractional-order capacitors, providing enhanced control over the transition slope. PSpice simulations confirmed a 1 kHz cut-off, showcasing low power consumption, minimal noise, and a wide dynamic range, positioning the filter as suitable for sensors, control, and acoustic applications.

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