Current- and voltage-mode third-order quadrature oscillator

Koton, Jaroslav; Herencsár, Norbert; Vrba, Kamil; Metin, Bilgin

doi:10.1109/optim.2012.6231795

Cited by 23 publications

(8 citation statements)

References 30 publications

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“…Authors used this amplifier as a part of CMOS electronically tunable CC. The voltage buffer and inverter were extracted from CMOS transistor implementation of universal voltage conveyor presented by Koton et al . An equation for current gain was noted in , and it is also valid for model that was introduced by us:

B = \frac{N I_{b 2}}{2 I_{SET_B}} \approx \frac{I_{b 2}}{I_{italicSET_B}},

where N means multiplication ratio of the current mirrors formed by M 8 –M 9 and M 10 –M 11 .…”

Section: Cmos Implementation Of Do‐cg‐cfbamentioning

confidence: 99%

Electronically controlled oscillator with linear frequency adjusting for four‐phase or differential quadrature output signal generation

Šotner

Herencsár

Jeřábek

et al. 2013

Circuit Theory & Apps

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This paper introduces novel four-phase oscillator employing two Dual-Output Controlled Gain Current Follower Buffered Amplifiers (DO-CG-CFBAs), single Current Amplifier, three resistors, and two grounded capacitors suitable for differential quadrature signal production (floating outputs). To control the frequency of oscillation (FO) and condition of oscillation (CO), only the current gain adjustment of active elements is used. The circuit was designed by well-known state variable approach. The oscillator employs three active elements for linear control of FO and to adjust CO and provides low-impedance voltage outputs. Furthermore, two straightforward ways of automatic amplitude gain control were used and compared. Active elements with very good performance are implemented to fulfill required features. Suitable CMOS implementation of introduced DO-CG-CFBA was shown. Important characteristics of the designed oscillator were verified experimentally and by PSpice simulations to confirm theoretical and expected presumptions.

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B = \frac{N I_{b 2}}{2 I_{SET_B}} \approx \frac{I_{b 2}}{I_{italicSET_B}},

where N means multiplication ratio of the current mirrors formed by M 8 –M 9 and M 10 –M 11 .…”

Section: Cmos Implementation Of Do‐cg‐cfbamentioning

confidence: 99%

Electronically controlled oscillator with linear frequency adjusting for four‐phase or differential quadrature output signal generation

Šotner

Herencsár

Jeřábek

et al. 2013

Circuit Theory & Apps

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“…Oscillator and Biquadratic Filter Realization 3. Different type active elements in the same topology are used in [35], [36], and [43]; 4. Topologies in [29], [31], [33], [34], [36]- [38], [41], [43], and [44] do not have MOS-C realization, which is a need for integration; 5.…”

Section: Introductionmentioning

confidence: 99%

“…Different type active elements in the same topology are used in [35], [36], and [43]; 4. Topologies in [29], [31], [33], [34], [36]- [38], [41], [43], and [44] do not have MOS-C realization, which is a need for integration; 5. Electronic tuneability is not available in [29], [31], [33], [34], [37], [38], [41], and [43];…”

Section: Introductionmentioning

confidence: 99%

MOS-C Based Electronically Tuneable Current/Voltage-Mode Third Order Quadrature Oscillator and Biquadratic Filter Realization

Çiçekli

Gökçen

2021

ELEKTRON ELEKTROTECH

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This paper introduces a new electronically tuneable third order quadrature oscillator and biquadratic filter with MOS-C realization using all grounded passive components. Voltage-mode second order low-pass, high-pass, band-pass filters using second generation current conveyor and a current/voltage-mode third order quadrature sinusoidal oscillator using multi-output second generation current conveyor are synthesized from the proposed circuit topology. All synthesized circuits are compatible with integration and the center frequency can be electronically tuned by the gate voltage of the MOS transistors. The proposed circuits do not need any component matching condition. Oscillation condition and frequency of oscillation can be independently controlled. Workability of the proposed circuits is validated by PSPICE software using 0.18 micrometer MOSIS CMOS process parameters at ±0.9 V supply voltage. Tuneability of the oscillator is demonstrated for a tested frequency range both in voltage-mode and current-mode operations.

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“…In ref. [16], authors have been presented third-order quadrature oscillator using two second generation current conveyors, a UVC, three capacitors and three resistors. However, to the best of the knowledge and belief of the author, none of the SRCOs using single UVC has yet been presented in the literature so far.…”

Section: Introductionmentioning

confidence: 99%

Single-Resistance Controlled Sinusoidal Oscillator Employing Single Universal Voltage Conveyor

Pushkar¹

2018

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In this paper, a new single-resistance controlled sinusoidal oscillator (SRCO) using single universal voltage conveyor (UVC) has been presented. The proposed SRCO employs single universal voltage conveyor, three resistors, and two capacitors. The proposed configuration offers the following advantageous features (1) independent control of condition of oscillation and frequency of oscillation (2) low passive sensitivities. The validity of the proposed SRCO has been established by SPICE (version 16.5) simulations using Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 µm technology.

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Current- and voltage-mode third-order quadrature oscillator

Cited by 23 publications

References 30 publications

Electronically controlled oscillator with linear frequency adjusting for four‐phase or differential quadrature output signal generation

Electronically controlled oscillator with linear frequency adjusting for four‐phase or differential quadrature output signal generation

MOS-C Based Electronically Tuneable Current/Voltage-Mode Third Order Quadrature Oscillator and Biquadratic Filter Realization

Single-Resistance Controlled Sinusoidal Oscillator Employing Single Universal Voltage Conveyor

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