A new low-voltage operational transconductance amplifier with push-pull CMFB scheme for low-pass filter applications

Liao, Pao-Hua; Hwang, Yuh‐Shyan; Chen, Jiann‐Jong; Ku, Young; Wang, San-Fu

doi:10.1016/j.aeue.2020.153298

Cited by 10 publications

(5 citation statements)

References 36 publications

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“…The dynamic range is expended to an amplitude of 5.68 Vpp, resulting in a phase shift of approximately 5.3-degrees. The following FOM is shown in (44), which is based on the ratio of the input voltage to power supply voltage, Vin / Vdd [2]. Based on (44), the FOM of AD844-type filter is 47.3%.…”

Section: A Proposed Ad844-type Cfoa-based Filtermentioning

confidence: 99%

Analytical Synthesis of High-Pass, Band-Pass and Low-Pass Biquadratic Filters and its Quadrature Oscillator Application Using Current-Feedback Operational Amplifiers

Wang

Chen

et al. 2021

IEEE Access

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Section: A Proposed Ad844-type Cfoa-based Filtermentioning

confidence: 99%

Analytical Synthesis of High-Pass, Band-Pass and Low-Pass Biquadratic Filters and its Quadrature Oscillator Application Using Current-Feedback Operational Amplifiers

Wang

Chen

et al. 2021

IEEE Access

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“…With increasing emphasis on voltage-mode (VM) biquads and oscillators, there is still a need to develop active components for VM biquads and oscillators. Oscillators [1][2][3][4][5][6] and biquads [7][8][9][10][11][12][13][14] are the most crucial circuit blocks in numerous applications, such as electronic communications, signal processing systems, and measurement systems. Especially in communication modulation systems, the sinusoidal oscillator is utilized to generate the carrier signals for amplitude modulation (AM) and amplitude shift keying (ASK) modulation.…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment of Electronically Tunable Voltage-Mode Biquad and Output Current Amplitude Oscillator

Wang

Chen

et al. 2021

Applied Sciences

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This study presents an electronically tunable configuration for the design of a voltage-mode (VM) biquad with four input terminals and three output terminals. The proposed circuit employs four operational transconductance amplifiers (OTAs) and two grounded capacitors. Depending on the selections of the four input voltage signals, all the standard filtering functions can be realized. The proposed configuration simultaneously provides VM inverting band-pass, non-inverting low-pass, and non-inverting band-reject filtering functions without any component-matching choices. It offers the features of a resistorless structure, high-input impedance, electronic control of the pole frequency and quality factor, and low active and passive sensitivities. The measured power dissipation of the biquad is 0.96 W under 32 mA constant output current. The measured 1 dB power gain compression point of the output inverting band-pass filter is −7 dBm. The measured value of the third-order intercept point is 5.136 dBm, and the measured value of the third-order intermodulation distortion is −50.83 dBc. Moreover, the measured value of the spurious-free dynamic range is 53.49 dB, and the figure-of-merit of the biquad is 268.75 × 103. In addition, an electronically controllable quadrature oscillator (QO) with amplitude of output current can be realized using the proposed biquad. The proposed electronically controllable QO can provide an amplitude modulation signal or an amplitude shift keying signal, and is widely applied in signal processing systems and electronic communication systems. PSpice simulations and experimental results are accomplished.

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“…To cope with these problems, this work shows the appropriateness of applying many-objective metaheuristics to size CMOS OTAs considering more than four objectives. More specifically, we show the application of NSGA-III and the many-objective metaheuristic based on the R2 Indicator (MOMBI-II) for the optimal sizing of three OTAs, taken as a case study, considering a figure of merit (FoM) [19,20]. In this work, we show that many-objective metaheuristics provided better sizing solutions than the mono-objective and multi-objective algorithms.…”

Section: Introductionmentioning

confidence: 84%

On the Sizing of CMOS Operational Amplifiers by Applying Many-Objective Optimization Algorithms

2021

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In CMOS integrated circuit (IC) design, operational amplifiers are one of the most useful active devices to enhance applications in analog signal processing, signal conditioning and so on. However, due to the CMOS technology downscaling, along the very large number of design variables and their trade-offs, it results difficult to reach target specifications without the application of optimization methods. For this reason, this work shows the advantages of performing many-objective optimization and this algorithm is compared to the well-known mono- and multi-objective metaheuristics, which have demonstrated their usefulness in sizing CMOS ICs. Three CMOS operational transconductance amplifiers are the case study in this work; they were sized by applying mono-, multi- and many-objective algorithms. The well-known non-dominated sorting genetic algorithm version 3 (NSGA-III) and the many-objective metaheuristic-based on the R2 indicator (MOMBI-II) were applied to size CMOS amplifiers and their sized solutions were compared to mono- and multi-objective algorithms. The CMOS amplifiers were optimized considering five targets, associated to a figure of merit (FoM), differential gain, power consumption, common-mode rejection ratio and total silicon area. The designs were performed using UMC 180 nm CMOS technology. To show the advantage of applying many-objective optimization algorithms to size CMOS amplifiers, the amplifier with the best performance was used to design a fractional-order integrator based on OTA-C filters. A variation analysis considering the process, the voltage and temperature (PVT) and a Monte Carlo analysis were performed to verify design robustness. Finally, the OTA-based fractional-order integrator was used to design a fractional-order chaotic oscillator, showing good agreement between numerical and SPICE simulations.

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A new low-voltage operational transconductance amplifier with push-pull CMFB scheme for low-pass filter applications

Cited by 10 publications

References 36 publications

Analytical Synthesis of High-Pass, Band-Pass and Low-Pass Biquadratic Filters and its Quadrature Oscillator Application Using Current-Feedback Operational Amplifiers

Analytical Synthesis of High-Pass, Band-Pass and Low-Pass Biquadratic Filters and its Quadrature Oscillator Application Using Current-Feedback Operational Amplifiers

Design and Experiment of Electronically Tunable Voltage-Mode Biquad and Output Current Amplitude Oscillator

On the Sizing of CMOS Operational Amplifiers by Applying Many-Objective Optimization Algorithms

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