Continuous-Time Active Filter Design

Deliyannis, T.; Sun, Yichuang; Fidler, J.

doi:10.1201/9781439821879

Cited by 162 publications

(77 citation statements)

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“…The implementation of the FBD in Fig. 1, using op-amps as active elements for realizing the lossless integration and summation stages, 29 in the case of a 5th-order approximation, is depicted in Fig. 7.…”

Section: Realizations Of Fractional-order Capacitor and Inductor Emulmentioning

confidence: 99%

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Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

Τσιριμώκου

Kartci

Koton

et al. 2018

J CIRCUIT SYST COMP

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Due to the absence of commercially available fractional-order capacitors and inductors, their implementation can be performed using fractional-order di®erentiators and integrators, respectively, combined with a voltage-to-current conversion stage. The transfer function of fractional-order di®erentiators and integrators can be approximated through the utilization of appropriate integer-order transfer functions. In order to achieve that, the Continued Fraction Expansion as well as the Oustaloup's approximations can be utilized. The accuracy, in terms of magnitude and phase response, of transfer functions of di®erentiators/integrators derived through the employment of the aforementioned approximations, is very important factor for achieving high performance approximation of the fractional-order elements. A comparative study of the accuracy o®ered by the Continued Fraction Expansion and the Oustaloup's approximation is performed in this paper. As a next step, the corresponding implementations of the emulators of the fractional-order elements, derived using fundamental active cells such as operational ampli¯ers, operational transconductance ampli¯ers, current conveyors, and current feedback operational ampli¯ers realized in commercially available discrete-component IC form,

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Section: Realizations Of Fractional-order Capacitor and Inductor Emulmentioning

confidence: 99%

“…(10)- (11) have the same general form, they can be implemented by the same topology. Thus, the Follow-the-Leader Feedback (FLF) and Inverse-Follow-theLeader-Feedback (IFLF) structures, 29 represented by the FBDs in Figs. 6(a) and 6(b), respectively, can be utilized for this purpose.…”

Section: Realizations Of Fractional-order Capacitor and Inductor Emulmentioning

confidence: 99%

Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

Τσιριμώκου

Kartci

Koton

et al. 2018

J CIRCUIT SYST COMP

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“…Design of all-pole and transmission zero MLF OTA-C filters have been well investigated in [1,10]. The seventhorder fully-balanced MLF LF filter structure with input distribution OTA network to realize gain boost zeros is shown in Fig.2.…”

Section: Filter Architecture and Synthesismentioning

confidence: 99%

“…For example, highperformance high-frequency filters are required for read/write channel equalization in computer hard-disk drive systems and intermediate-frequency (IF) filtering for communication systems. Continuous-time operational transconductance amplifier and capacitor (OTA-C) filters have been shown to perform well in high frequency applications [1]. Unlike switched-capacitor filters, OTA-C filters do not suffer from the switching noise problem and doe not need pre-or post-filtering.…”

Section: Introductionmentioning

confidence: 99%

“…The cascade topology can be used to realize a filter with arbitrary transfer functions, but sensitivity is higher, in particular, as filter order increases. One of the solutions is to use the multiple loop feedback (MLF) structure [1][2][3]. The single-ended MLF OTA-C filter based on the leapfrog (LF) configuration for read channel application has been discussed in [3].…”

Section: Introductionmentioning

confidence: 99%

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A 2V 0.25μm CMOS 250MHz Fully-differential Seventh-order Equiripple Linear Phase LF Filter

Hasan

Sun

2005 IEEE International Symposium on Circuits and Systems

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Abstract-A fully-differential seventh-order 0.05° equiripple linear phase low-pass filter based on multiple loop feedback (MLF) leapfrog (LF) topology is presented for read/write channels. The filter is designed and simulated with the proposed fully balanced, highly linear operational transconductance amplifier (OTA). This OTA contains two complementary differential cross-coupled input pairs and a pair of regulated cascode output in order to achieve both lowdistortion and wide dynamic rang in high-frequency operation. Simulations in 0.25µm CMOS show that the cutoff frequency of the low pass filter without and with gain boost ranges from 50 to 150MHz and 65 to 250MHz respectively, dynamic-range is over 65dB and total harmonic distortion is less than 40dB. The group delay ripple is less than 5% for frequencies up to 1.5 times of the cutoff frequency, and for a 2-volt power supply, the maximum power consumption is 216mW.

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Minimal two‐transistor multifunction filter design

Maundy

Elwakil

Özoğuz

et al. 2017

Circuit Theory & Apps

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Summary This paper presents a comprehensive method and analysis on the design of two‐transistor multi‐output filters where three possible functions are simultaneously available. Although two transistors are employed at its core, proper biasing does not require additional passive components. A total of thirteen valid second‐order filters are reported, and several of them are experimentally tested using discrete transistors as well as simulated using Spectre in a BiCMOS process. A fully differential realization of a MOS‐C band‐pass filter, based on one of the structures found, is designed and then used to realize a fourth‐order Chebyshev band‐pass filter. Copyright © 2017 John Wiley & Sons, Ltd.

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Continuous-Time Active Filter Design

Cited by 162 publications

References 0 publications

Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators

A 2V 0.25μm CMOS 250MHz Fully-differential Seventh-order Equiripple Linear Phase LF Filter

Minimal two‐transistor multifunction filter design

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