A Design Example of a Fractional-Order Kerwin–Huelsman–Newcomb Biquad Filter with Two Fractional Capacitors of Different Order

Tripathy, Madhab Chandra; Biswas, Karabi; Sen, Siddhartha

doi:10.1007/s00034-012-9539-2

Cited by 81 publications

(25 citation statements)

References 15 publications

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“…Due to lack of such fractor, not all the conceptual advantages had been reflected in so far realized FO circuits. Like, there are deviation in simulated results and experimental results in FO band pass filter [16] and FO tuned filter [17] in low frequency zone, because associated fractors do not show constant phase at that zone. For the same reason, FO differentiator is also reported to loss their flexibility [13].…”

Section: Objective and Motivationmentioning

confidence: 70%

Realization of a carbon nanotube based electrochemical fractor

Adhikary

Khanra

Sen

et al. 2015

2015 IEEE International Symposium on Circuits and Systems (ISCAS)

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A fractor or a fractional order element should show a constant phase (CP), between ±90 0 (except 0 0 ) at any frequency, theoretically. However, all the practical realization of single component fractor have limitation in their CP zone. Not many single-component-fractors have been reported having CP zone more than a decade. In this work, new electrochemical type fractors have been developed, by coating a polymer-carbon nanotube (CNT) composite over Cu clad epoxy block and putting the block in polarizing solution. By varying the percentage of CNT in polymer-CNT composite and the nature of polarizing solution, two different types of fractor have been realized. One is a wide -band fractor having CP zone of five decades (20 Hz to 2 MHz) with a ripple of ±2 0 only. The other one shows two distinct CP zones at two different phase angles. Each zone is about two decade long. These fractors will help to realize fractional order circuits which need to be operated in wide frequency band.

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Section: Objective and Motivationmentioning

confidence: 70%

Realization of a carbon nanotube based electrochemical fractor

Adhikary

Khanra

Sen

et al. 2015

2015 IEEE International Symposium on Circuits and Systems (ISCAS)

Self Cite

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“…Considering in Eqs. (13) and (14), the transfer function sensitivities for various components (i.e., sensitivity toward , , R, C F1 and C F2 ) can be found as:…”

Section: Ccta For Fractional Order Universal Filtersmentioning

confidence: 99%

“…[6][7][8][9][10] Recently, previous work that generalized analogue circuit design has been used for a fractionalorder (FO) di®erentiator, an integrator, sinusoidal oscillators and¯lters. [11][12][13] Therefore,¯lters represent one of the most important and popular analogue blocks. The main advantage of the FO¯lter is that the analogue designer can obtain the exact requirements for the¯lter.…”

Section: Introductionmentioning

confidence: 99%

A ± 0.2 V, 0.12 Μw Ccta Using Vtmos and an Application Fractional-Order Universal Filter

Comedang¹,

Intani²

2014

J CIRCUIT SYST COMP

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In this paper, a variable threshold voltage metal oxide semiconductor (VTMOS)¯eld e®ect transistor is used to improve an ultra-low voltage, ultra-low power current conveyor transconductance ampli¯er (CCTA). To achieve the desired result, an analytical subthreshold VTMOS model is used. Designs that utilize the TSMC 0.18 m technology are veri¯ed using PSPICE simulation. The power consumption is simply 0.12 W at a AE 0.2 V supply voltage. The proposed CCTA is synthesized using fractional-order (FO) universal¯lters that can simultaneously realise low pass (LP), high pass (HP) and bandpass (BP) responses with independent control of quality factor and pole frequency by transconductances (g m ). Moreover, the circuit has low input and high output impedance which would be an ideal choice for cascading in current-mode circuit. The FŌ lters are constructed using two FO capacitors of orders and (0 < ; 1). The FO¯lters provide improved performance in terms of pole frequency compared with conventional-order lters. The¯lter has a low power consumption of 0.71 W at a AE 0.2 V supply voltage. The validity of the proposed¯lter is veri¯ed through PSPICE simulations. J CIRCUIT SYST COMP 2014.23. Downloaded from www.worldscientific.com by THE UNIVERSITY OF NEW SOUTH WALES on 03/16/15. For personal use only. T. Comedang & P. Intani 1450126-2 J CIRCUIT SYST COMP 2014.23. Downloaded from www.worldscientific.com by THE UNIVERSITY OF NEW SOUTH WALES on 03/16/15. For personal use only. A AE 0.2 V, 0.12 W CCTA Using VTMOS and an Application FO Universal Filter 1450126-9 J CIRCUIT SYST COMP 2014.23. Downloaded from www.worldscientific.com by THE UNIVERSITY OF NEW SOUTH WALES on 03/16/15. For personal use only. A AE 0.2 V, 0.12 W CCTA Using VTMOS and an Application FO Universal Filter 1450126-17 J CIRCUIT SYST COMP 2014.23. Downloaded from www.worldscientific.com by THE UNIVERSITY OF NEW SOUTH WALES on 03/16/15. For personal use only. T. Comedang & P. Intani 1450126-18 J CIRCUIT SYST COMP 2014.23. Downloaded from www.worldscientific.com by THE UNIVERSITY OF NEW SOUTH WALES on 03/16/15. For personal use only.

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“…On the other hand, the digital implementation suffers from the high power consumption associated with the required analog‐to‐digital (A/D) converter. Analog realizations of fractional‐order filters have been already introduced in discrete component form in , [16]–[26]. The used active elements were Operational Amplifiers (op‐amps), second‐generation Current Conveyors (CCIIs), and Current Feedback Operational Amplifiers (CFOAs).…”

Section: Introductionmentioning

confidence: 99%

Fractional‐order electronically controlled generalized filters

Τσιριμώκου

Psychalinos

Elwakil

2016

Circuit Theory & Apps

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Summary Novel topologies of fractional‐order generalized filters are introduced in this paper. These offer the following benefits: (1) realization of lowpass, highpass, bandpass, allpass, or bandstop filter functions by the same topology; (2) resistorless realizations; (3) electronic adjustment of their frequency characteristics as well as their order; and (4) employment of only grounded capacitors. All the above have been achieved using Operational Transconductance Amplifiers as active elements and appropriate multi‐feedback topologies. The behavior of the proposed designs is verified through simulation results using the Cadence IC design suite and the Design Kit provided by the Austrian Micro Systems 0.35‐µm complementary metal–oxide–semiconductor process. Copyright © 2016 John Wiley & Sons, Ltd.

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A Design Example of a Fractional-Order Kerwin–Huelsman–Newcomb Biquad Filter with Two Fractional Capacitors of Different Order

Cited by 81 publications

References 15 publications

Realization of a carbon nanotube based electrochemical fractor

Realization of a carbon nanotube based electrochemical fractor

A ± 0.2 V, 0.12 Μw Ccta Using Vtmos and an Application Fractional-Order Universal Filter

Fractional‐order electronically controlled generalized filters

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