A New VCII Application: Sinusoidal Oscillators

Stornelli, Vincenzo; Barile, Gianluca; Pantoli, Leonardo; Scarsella, Massimo; Ferri, Giuseppe; Centurelli, Francesco; Tommasino, Pasquale; Trifiletti, Alessandro

doi:10.3390/jlpea11030030

Cited by 17 publications

(18 citation statements)

References 44 publications

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“…With regard to the relevant literature, only single-phase VCII-based oscillator topologies have been already published in [28] and, therefore, the topology in Fig. 8 is the first VCII-based multi-phase oscillator, introduced in the literature.…”

Section: Application Design Examplesmentioning

confidence: 99%

Flipped Voltage Follower-Based Voltage Conveyors: Investigation and Possible Enhancements

Psychalinos

Yeşil

Mınaeı

et al. 2022

Circuits Syst Signal Process

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Second-generation voltage conveyor structures, based on the employment of flipped voltage follower stages, are investigated and proposed in this work. The proposed core has the feature of offering extremely low or electronically adjustable input resistance and programmable outputs, enhancing the achieved design flexibility and versatility of this active cell. Two design examples are presented in this work, including a multi-phase sinusoidal oscillator topology and an electronically adjustable first-order low-pass filter, both supported by simulation and experimental results.

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Section: Application Design Examplesmentioning

confidence: 99%

Flipped Voltage Follower-Based Voltage Conveyors: Investigation and Possible Enhancements

Psychalinos

Yeşil

Mınaeı

et al. 2022

Circuits Syst Signal Process

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“…The main current-mode analog blocks are the second-generation current conveyor (CCII) and its dual, the second-generation voltage conveyor (VCII). These blocks have been successfully applied to the realization of a variety of analog signal processing functions [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. For example, in [ 31 ] a current-mode full-wave bridge rectifier has been developed; in [ 32 , 40 , 42 ] the realization of various filter functions using VCII is shown; and in [ 33 , 53 ] current-mode oscillators are described.…”

Section: Introductionmentioning

confidence: 99%

A Survey on Current-Mode Interfaces for Bio Signals and Sensors

Scarsella

Barile

Stornelli

et al. 2023

Sensors

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In this study, a review of second-generation voltage conveyor (VCII) and current conveyor (CCII) circuits for the conditioning of bio signals and sensors is presented. The CCII is the most known current-mode active block, able to overcome some of the limitations of the classical operational amplifier, which provides an output current instead of a voltage. The VCII is nothing more than the dual of the CCII, and for this reason it enjoys almost all the properties of the CCII but also provides an easy-to-read voltage as an output signal. A broad set of solutions for relevant sensors and biosensors employed in biomedical applications is considered. This ranges from the widespread resistive and capacitive electrochemical biosensors now used in glucose and cholesterol meters and in oximetry to more specific sensors such as ISFETs, SiPMs, and ultrasonic sensors, which are finding increasing applications. This paper also discusses the main benefits of this current-mode approach over the classical voltage-mode approach in the realization of readout circuits that can be used as electronic interfaces for different types of biosensors, including higher circuit simplicity, better low-noise and/or high-speed performance, and lower signal distortion and power consumption.

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“…Electronic circuit design using active building blocks (ABBs) is very popular. As it provides a great deal of convenience and flexibility for designers, the circuits designed using active building blocks are simple in structure and often contain a few passive devices [9][10][11]. Currently, there are a variety of active building blocks with bipolar junction transistor structures or C-MOS transistor structures.…”

Section: Introductionmentioning

confidence: 99%

Design of Electronically Controllable Multifunction Active Filter with Amplitude Controllability Using Two Commercially Available ICs

Onanong

Supavarasuwat

Angamnuaysiri

et al. 2022

Journal of Electrical and Computer Engineering

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In this contribution, the design and analysis of an active multifunction biquad filter that provides five voltage-mode filtering configurations in the same core filtering circuit are presented. The design emphasizes using the commercially available ICs, LT1228, which are easy for off-the-shelf implementation and cheaper compared with the chip implementation. The proposed multifunction filter is realized from two commercial LT1228 ICs as the active function block, combined with five passive elements (three resistors and two capacitors) with three input voltage nodes and a single output voltage node. The following advantages are given for this design: (i) it provides high-pass (HP), low-pass (LP), band-stop (BS), band-pass (BP), and all-pass (AP) filtering functions; (ii) orthogonal and electronic tuning of the natural frequency ω 0 and bandwidth (the quality factor: Q); (iii) output voltage node of the proposed circuit is low impedance; (iv) passband voltage gain is controllable; and (v) matching condition and extra double gain voltage-mode amplifier are not required. The effect of the parasitic element in LT1228 on the filter performance is analyzed and included to strengthen the design idea. The PSpice simulation results using LT1228 with ±5 V and the experimental results tested from the hardware implementation are given to prove the validity of the designed multifunction filter.

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A New VCII Application: Sinusoidal Oscillators

Cited by 17 publications

References 44 publications

Flipped Voltage Follower-Based Voltage Conveyors: Investigation and Possible Enhancements

Flipped Voltage Follower-Based Voltage Conveyors: Investigation and Possible Enhancements

A Survey on Current-Mode Interfaces for Bio Signals and Sensors

Design of Electronically Controllable Multifunction Active Filter with Amplitude Controllability Using Two Commercially Available ICs

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