An Explicit Output Current-mode Quadrature Sinusoidal Oscillator and a Universal Filter Employing Only Grounded Passive Components - a Minimal Realisation

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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Current-mode Single-Input Three-Output (SITO) Universal Filter Employing FTFNs and Reduced Number of Passive Components

Frequenz ◽

10.1515/freq.2000.54.3-4.94 ◽

2000 ◽

Vol 54 (3-4) ◽

Cited By ~ 1

Author(s):

Uğur Çam, ◽

Oğuzhan Çiçekoğlu ◽

Hakan Kuntman

Keyword(s):

Current Mode ◽

Universal Filter ◽

Passive Components ◽

Single Input

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MULTI-OUTPUT CURRENT FOLLOWER BASED CURRENT-MODE UNIVERSAL FILTER EMPLOYING ONLY GROUNDED CAPACITORS

Journal of Circuits System and Computers ◽

10.1142/s0218126614501230 ◽

2014 ◽

Vol 23 (09) ◽

pp. 1450123 ◽

Cited By ~ 2

Author(s):

HALIL ALPASLAN ◽

ERKAN YUCE

Keyword(s):

Output Voltage ◽

Current Mode ◽

Passive Component ◽

Theoretical Knowledge ◽

Universal Filter ◽

Output Current ◽

Matching Conditions ◽

Current Follower ◽

Component Matching ◽

High Output

In this paper, a new two-input three-output second-order universal filter is proposed. Two multi-output voltage controlled current followers (MO-VCCFs) and two capacitors are used in the proposed filter. The proposed filter does not have external passive resistors. It has high output impedances yielding easy cascadability. It has the property of electronic tunability. It does not need any critical passive component matching conditions. Also, it is composed of only grounded capacitors; accordingly, it is suitable for integration. Theoretical knowledge is supported via SPICE simulations.

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Electronically Tunable Sinusoidal Oscillator Circuit

Active and Passive Electronic Components ◽

10.1155/2012/719376 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 17

Author(s):

Sudhanshu Maheshwari ◽

Rishabh Verma

Keyword(s):

Frequency Tuning ◽

Current Mode ◽

Bias Current ◽

Cmos Process ◽

Third Order ◽

Passive Components ◽

Sinusoidal Oscillator ◽

Wide Range ◽

Tunable Frequency ◽

Electronically Tunable

This paper presents a novel electronically tunable third-order sinusoidal oscillator synthesized from a simple topology, employing current-mode blocks. The circuit is realized using the active element: Current Controlled Conveyors (CCCIIs) and grounded passive components. The new circuit enjoys the advantages of noninteractive electronically tunable frequency of oscillation, use of grounded passive components, and the simultaneous availability of three sinusoidal voltage outputs. Bias current generation scheme is given for the active elements used. The circuit exhibits good high frequency performance. Nonideal and parasitic study has also been carried out. Wide range frequency tuning is shown with the bias current. The proposed theory is verified through extensive PSPICE simulations using 0.25 μm CMOS process parameters.

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