A Current Mode Design of Fractional Order Universal Filter

This research article explores the possible applications of voltage differencing current conveyor (VDCC), as a current mode universal filter and a sinusoidal oscillator. Without the need for an additional active/passive element, a very simple hardware modification makes it a dual-mode quadrature oscillator from the filter configuration. Both the proposed circuit requires only two VDCC and all grounded passive elements, hence a preferable choice for integration. The filter has some desirable features such as availability of all five explicit outputs, independent tunability of filter parameters. Availability of explicit quadrature current outputs, independence in start and frequency of oscillations, makes it a better oscillator design. Apart from prevalent CMOS simulation results, VDCC is also realized and experimentally tested using the off-the-shelf integrated circuit. All the pen and paper analysis such as non-ideal, sensitivity and parasitic analysis supports the design.

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Universal Tunable Current-Mode Biquad Employing Distributed Feedback Structure with MO-CCCII

Journal of Electrical Engineering ◽

10.2478/v10187-010-0007-6 ◽

2010 ◽

Vol 61 (1) ◽

pp. 52-56 ◽

Cited By ~ 7

Author(s):

Roman Šotner ◽

Josef Slezák ◽

Tomáš Dostál ◽

Jiří Petržela

Keyword(s):

Building Block ◽

Current Mode ◽

Distributed Feedback ◽

Universal Filter ◽

State Variable ◽

Mode Design ◽

Electronic Tuning ◽

Feedback Structure ◽

Electronically Tunable ◽

Active Block

Universal Tunable Current-Mode Biquad Employing Distributed Feedback Structure with MO-CCCIIOne possible application of the multiple-output electronically-tunable active building block as a universal filter with distributed feedback structure is presented. The suggested structure is less conventional than the well-known state-variable Kerwin-Huelsman-Newcomb but allows the same filter configurations with the similar properties. The major current-mode design approach disadvantage,ie, the necessity of multiple current outputs, is demonstrated. To date even a rather big line of the commercially available devices do not solve this problem. Some features of the active block used for modelling and transistor-level simulation are briefly discussed. The obvious chance for electronic tuning of the proposed filter is verified.

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Configuration for realising a current-mode universal filter and dual-mode quadrature single resistor controlled oscillator

IET Circuits Devices & Systems ◽

10.1049/iet-cds.2011.0160 ◽

2012 ◽

Vol 6 (3) ◽

pp. 159 ◽

Cited By ~ 27

Author(s):

K.K. Abdalla ◽

D.R. Bhaskar ◽

R. Senani

Keyword(s):

Current Mode ◽

Universal Filter ◽

Dual Mode ◽

A Current

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Fully Integrable/Cascadable CM Universal Filter and CM Quadrature Oscillator Using VDCC and Only Grounded Passive Elements

Journal of Circuits System and Computers ◽

10.1142/s0218126619501810 ◽

2019 ◽

Vol 28 (11) ◽

pp. 1950181 ◽

Cited By ~ 4

Author(s):

Tajinder Singh Arora ◽

Bhargavi Rohil ◽

Soumya Gupta

Keyword(s):

Current Mode ◽

Cmos Technology ◽

Universal Filter ◽

Passive Components ◽

Quadrature Oscillator ◽

High Impedance ◽

Low Pass ◽

Band Pass ◽

High Pass ◽

A Current

This paper proposes a current mode universal filter circuit, employing two active elements along with four grounded passive components only. The derived circuit realizes all five filtering responses, i.e., low pass (LP), band pass (BP), high pass (HP), band reject (BR) and all pass (AP), simultaneously from high-impedance ports along with the input being fed to low-impedance port, thus making it a fully cascadable filter. In addition, the designed circuit exhibits independent tunability of its quality factor. With the idea of making the proposed filter fully integrable, a resistor-less approach of the configuration has also been discussed. By making slight modifications in the filter configuration, a current mode single-resistance-controlled quadrature oscillator circuit has also been derived. The ideal, nonideal, sensitivity and parasitic analysis have been conducted for the designed configurations. The functionality of the proposed structures is verified by PSPICE simulations using 0.18[Formula: see text][Formula: see text]m CMOS technology. The designs have also been verified using PSPICE macro-model of the commercially available IC, i.e., OPA860.

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MO-CCCII Based Current-Mode Fractional-Order Universal Filter

Journal of Circuits System and Computers ◽

10.1142/s0218126621501322 ◽

2020 ◽

pp. 2150132

Author(s):

Fadile Sen ◽

Ali Kircay

Keyword(s):

Fractional Order ◽

Stop Band ◽

Current Mode ◽

Current Conveyors ◽

Universal Filter ◽

Precise Control ◽

Design Flexibility ◽

Circuit Components ◽

Controlled Current Conveyors ◽

Multi Mode

In this study, a new current-mode fractional-order universal filter is presented by using multi mode second generation current controlled current conveyors (MO-CCCII). The circuit consists of two resistors and grounded capacitors with only three MO-CCCII. This is accomplished with a fractional-order capacitor, also known as a stationary phase element, to form a fractional-order filter. The value of this capacitor depends only on the fractional-order [Formula: see text]. The proposed filter is designed as fractional [Formula: see text], 1.8 and 1.9 order. The fractional-order capacitor is obtained using the Foster-I [Formula: see text] network circuit. The filter is simulated with BJT-based MO-CCCII using PSPICE simulation program for the filter to verify the theory and to show the performance of it. The fractional-order universal filter outputs are provided the desired stop band attenuation and more precise control of attenuation slope. Through the fractional-order parameter, it is revealed that the filter designer can fully meet the requirements of the filter. It also offers design flexibility since the frequencies of interest depend not only on circuit components but also on fractional-order parameters.

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Synthesis for Butterworth Filter Using Compact VDTA Based on Sallen- Key Topology

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2352096512666191004123213 ◽

2020 ◽

Vol 13 (5) ◽

pp. 681-688

Author(s):

Yong-An Li

Keyword(s):

Network Theory ◽

Current Mode ◽

Second Order ◽

Frequency Filter ◽

Butterworth Filter ◽

Admittance Matrix ◽

Floating Capacitor ◽

A Current

Background: The original filter including grounded or virtual ground capacitors can be synthesized by using the NAM expansion. However, so far the filters including floating capacitor, such as Sallen-Key filter, have not been synthesized by means of the NAM expansion. This is a problem to be researched further. Methods: By using the adjoint network theory, the Sallen-Key filter including floating capacitor first is turned into a current-mode one, which includes a grounded capacitor and a virtual ground capacitor. Then the node admittance matrix, after derived, is extended by using NAM expansion. Results: At last, one VDTA Sallen-Key filter is received. It employs single compact VDTA and two grounded capacitors. Conclusion: A Butterworth VDTA second-order frequency filter based on Sallen-Key topology with fo = 100kHz, HLP = -HBP=1, is designed.

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CDBA based current instrumentation amplifier

Journal of Communications Technology Electronics and Computer Science ◽

10.22385/jctecs.v4i0.62 ◽

2016 ◽

Vol 4 ◽

pp. 11 ◽

Cited By ~ 3

Author(s):

Priyanka Gupta ◽

Kunal Gupta ◽

Neeta Pandey ◽

Rajeshwari Pandey

Keyword(s):

Current Mode ◽

Instrumentation Amplifier ◽

Pspice Simulations ◽

Differential Gain ◽

Novel Method ◽

Current Difference ◽

A Current

This paper presents a novel method to realize a current mode instrumentation amplifier (CMIA) through CDBA (Current difference Buffered Amplifier). It employs two CDBAs and two resistors to obtain desired functionality. Further, it does not require any resistor matching. The gain can be set according to the resistor values. It offers high differential gain and a bandwidth, which is independent of gain. The working of the circuit is verified through PSPICE simulations using CFOA IC based CDBA realization.

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