Current-mode third-order quadrature oscillator using VDTAs and grounded capacitors

Phatsornsiri, Punnavich; Lamun, Panit; Kumngern, Montree; Torteanchai, Usa

doi:10.1109/jictee.2014.6804103

Cited by 19 publications

(12 citation statements)

References 16 publications

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“…However, some research also deal with third order and higher order filters [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. These filters suffer from one or more of the following drawbacks: order oscillators [26]. Recently, a number of oscillators using VDTA as an active block have already been published [26][27][28][29], but all the reported circuits have one or more limitations:…”

Section: Introductionmentioning

confidence: 99%

New Electronically Tunable Third Order Filters and Dual Mode Sinusoidal Oscillator Using VDTAs and Grounded Capacitors

Paul

Pal

2021

Adv. technol. innov.

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This study introduces a third order filter and a third order oscillator configuration. Both the circuits use two voltage difference transconductance amplifiers (VDTAs) and three grounded capacitors. By selecting the input and output terminals properly, current mode and transimpedance mode low-pass and band-pass filters can be obtained without component matching conditions. The natural frequency (ω0) can be tuned electronically. The oscillator circuit provides voltage and current outputs explicitly. The condition of oscillation (CO) and the frequency of oscillation (FO) can be adjusted orthogonally and electronically. The workability of the configurations is judged using TSMC CMOS 0.18 μm technology parameter as well as commercially available LM13700 integrated circuits (ICs). The simulation results show that: for ±0.9V power supply, the power consumption is 1.08 mW for both the configurations, while total harmonic distortions (THDs) are less than 2.06% and 2.17% for the filter and oscillator configurations, respectively.

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Section: Introductionmentioning

confidence: 99%

New Electronically Tunable Third Order Filters and Dual Mode Sinusoidal Oscillator Using VDTAs and Grounded Capacitors

Paul

Pal

2021

Adv. technol. innov.

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“…9 In open literature, various approaches have been used to realize third-order sinusoidal oscillator (TOSO) circuits. [10][11][12][13][14][15][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] The reported TOSO circuits have been designed using one of the following approaches:…”

Section: Introductionmentioning

confidence: 99%

“…• A cascade connection of second-order low-pass filter and an inverting integrator in a loop with unity feedback. [10][11][12][13][14][15][16][17][18][19][20][21][22][23]50 • A cascade connection of second-order high-pass filter with noninverting differentiator in a loop. 16,17,50 • A combination of an inverting lossy integrator with two lossless noninverting integrators in a loop.…”

Section: Introductionmentioning

confidence: 99%

Systematic realization of low‐frequency third‐order sinusoidal oscillators

Raj

Kumar

Bhaskar

2021

Circuit Theory & Apps

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In this paper, a systematic realization technique for low-frequency third-order sinusoidal oscillators (TOSOs) with independent control of condition of oscillation (CO) and frequency of oscillation (FO), employing minimum number of resistors and grounded capacitors, has been presented. Twelve new matrices have been systematically derived. These 12 matrices lead to four distinct low-frequency sinusoidal oscillators with independent control of CO and FO. Workability of these proposed oscillators has been validated through experimental results of low-frequency oscillations operating at 3.03 Hz, realized with off-the-shelf available IC AD844 type CFOAs. The total harmonic distortion of the presented oscillators is below 0.74%, and the frequency deviations are less than 1.06%.

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“…The QOs using active building blocks such as operational amplifier [31], second-generation current conveyor (CCII) [32][33][34], differential voltage current conveyor (DVCC) [35], operational transresistance amplifier (OTRA) [36], [37], [50], offer orthogonal control of CO and FO, but these structures lack the electronic tuning capability. A number of electronic-controlled third-order QOs have been reported using active building blocks such as current-controlled CCII (CCCII) [38], [39], current difference transconductance amplifier (CDTA) [40], [41], current-controlled CDTA (CCDTA) [42], current-controlled current conveyor transconductance amplifier (CCCTA) [43], [44], OTRA and MOS-C [45], DDCC and VDTA [46], [51], [52], differential voltage current conveyor transconductance amplifier (DVCCTA) [47]. They exhibit high potential for enjoying up the electronic tunability.…”

Section: Introductionmentioning

confidence: 99%