CCTAs based Current-mode Quadrature Oscillator with High Output Impedances

Thosdeekoraphat, Thanaset; Summart, Saksit; Saetiaw, Charinsak; Santalunai, Samran; Thongsopa, Chanchai

doi:10.12720/ijeee.1.1.52-56

Cited by 8 publications

(10 citation statements)

References 15 publications

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“…Active building blocks are extensively employed in analog signal processing nowadays, and the current conveyor transconductance amplifier (CCTA) [6] is one of them. The CCTA is used in analog signal processing, such as in sinusoidal oscillators [7][8][9][10][11], and has been the subject of a number of papers and studies. Consequently, the current-controlled current conveyor transconductance amplifier (CCCCTA) [12] has been upgraded from a CCTA to a CCCCTA by using a current-controlled function to operate the internal resistance.…”

Section: Introductionmentioning

confidence: 99%

“…The oscillators described in references [22][23][24] can be adjusted electronically to tune the oscillation frequency and condition, which are conveniently controlled for tuning by microcontrollers and microprocessors. The proposed circuits in [8,[25][26][27] use only grounded capacitors, which are also used for making up ICs. The sinusoidal oscillators presented in [25][26][27][28] use a single active element that is readily implemented and tested.…”

Section: Introductionmentioning

confidence: 99%

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A simple sinusoidal quadrature oscillator using a single active element

et al. 2023

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This study describes a simple design for a single active element sinusoidal oscillator with a quadrature signal. A current conveyor transconductance amplifier (CCTA), a single resistor, and two grounded capacitors are used in the first circuit. The second circuit is improved by using a current-controlled current conveyor transconductance amplifier (CCCCTA) and two grounded capacitors without a passive resistor, which means the grounded capacitor is suitably implemented for the IC fabrication. The oscillation condition and frequency of both circuits can be controlled using the same method that concurrently adjusts the DC bias current and the resistance as well as the oscillation frequency can be independently adjusted by capacitances. The CCTA is achieved by cascading the integrated circuits (IC) AD844 and LM13700, made by Analog Devices Corporation and Texas Instruments, respectively, which are available for commercial purchase. The sinusoidal quadrature signals in the time-domain and frequency-domain can be shown with computer simulations and the results of experiments. The Monte Carlo Analysis is also utilized to examine the oscillation frequency with the influence of passive element tolerance errors. The predicted oscillation frequency has a standard variation of about 20.04 kHz, with a maximum frequency of approximately 346.89 kHz and a minimum frequency of approximately 259.09 kHz. In addition, the mean and median frequencies are 296.10 and 293.98 kHz, respectively. The results of this study indicate that computer simulation and experiment are similar to a theoretical analysis, making them suiTable for use in the teaching of electrical and electronic engineering

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A simple sinusoidal quadrature oscillator using a single active element

et al. 2023

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“…Analog signal processing circuits such as sinusoidal oscillator [1]- [5], and second-order filter [6]- [10] have been numerously researched and published. Fundamentally, the background of these is synthesized or designed with the differentiator or integrator [11]- [40]. They are designed or synthesized with the highperformance active building block such as operational amplifier (OPAMP) [11], [12], [15], [36], current conveyor second generation (CCII) [16], [17], [33], current feedback amplifier (CFA) [13], [18]- [20], [23], [24], [27], [30]- [32], current controlled current feedback amplifier (CC-CFA) [21], current controlled current differencing buffered amplifier (CCCDBA) [22], operational transconductance amplifier (OTA) [26], [35], [39], current follower transconductance amplifier (CFTA) [28], and current conveyor transconductance amplifier (CCTA) [40].…”

Section: Introductionmentioning

confidence: 99%

“…The proposed circuits in [13], [20], [23], [25], [30], [32] ISSN: 2088-8708  are designed for electronic tuning by using a multiplier circuit, but two types of the different active elements have been used. The differentiators and integrators of [14], [21], [22], [28], [40] can be electronically tuned the time constant although they are still sensitive to the temperature. Furthermore, some proposed circuits in [11], [12], [15], [17]- [19], [22], [25], [30], [31], [37] use the floating capacitor that is not suitable for the integrated circuit fabrication.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, some proposed circuits in [11], [12], [15], [17]- [19], [22], [25], [30], [31], [37] use the floating capacitor that is not suitable for the integrated circuit fabrication. The configurations in [13], [14], [23], [28], [34], [40] are operated in the integrator while those in [15], [27] [31], [38], [39] are served to operated in the differentiator. The comparison of the differentiator and integrator circuits can be shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Reconfigurable of current-mode differentiator and integrator based-on current conveyor transconductance amplifiers

Srisoontorn

Charoenmee²,

Panikhom³

et al. 2022

IJECE

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The reconfigurable of the differentiator and integrator based on current conveyor transconductance amplifiers (CCTAs) have been presented in this paper. The proposed configurations are provided with two CCTAs and grounded elements. The configurations can be operated in the differentiator and integrator by selecting external passive elements. The input and output currents have low and high impedances, respectively; therefore, the configurations can be cascaded without additional current buffer. The proposed configurations can be electronically tuned by external direct current (DC) bias currents, and it also has slight fluctuation with temperature. An application of universal filter is demonstrated to confirm the ability of the proposed configurations. The results of simulation with Pspice program are accordance with the theoretical analysis.

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