A Review of CMOS Variable Gain Amplifiers and Programmable Gain Amplifiers

Bai, Chunfeng; Wu, Jianhui; Deng, Xiaoying

doi:10.1080/02564602.2018.1507766

Cited by 7 publications

(3 citation statements)

References 71 publications

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“…The amplifier gain is programmed so that it generates an output signal that is compatible with the input dynamic range of the analog-to-digital converter (ADC). Several gain programming techniques (analog and digital) have been presented in the literature [33]. Some of these techniques that are used in open loop PGA topology include varying the transconductance by tuning a bias current, exploiting controlled current dividers, and introducing a source degeneration resistor.…”

Section: Programmable Gain Amplifiermentioning

confidence: 99%

A Versatile SoC/SiP Sensor Interface for Industrial Applications: Implementation Challenges

et al. 2022

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We present in this paper design considerations and implementation challenges of a proposed versatile SoC/SiP sensor interface intended for industrial applications. The proposed interface involves high-voltage circuits such as class-D power amplifiers, gate drivers, level shifters, and electrical isolators. Also, it includes low-voltage blocks like programmable gain amplifiers and ADCs. In addition, DC-to-DC converters are used to supply the various building blocks of the projected sensor interface. The key challenges for implementing each block are discussed in this paper. Also, the technological aspects to support the proposed SoC/SiP solution are given. Moreover, the different available packaging technologies to implement the intended SiP solution are discussed in addition to the thermal aspects associated with the system packaging.INDEX TERMS Industrial applications, sensor interface, versatility, system-on-chip (SoC), system-inpackage (SiP), thermal management. Author et al.: Preparation of Papers for IEEE TRANSACTIONS and JOURNALS TABLE 1. Performance Comparison of High-Voltage and High-Power Class-D Power Amplifiers. YVES AUDET (Member, IEEE) received the B.Sc. degree and the M.Sc. degree in physics from the

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Section: Programmable Gain Amplifiermentioning

confidence: 99%

A Versatile SoC/SiP Sensor Interface for Industrial Applications: Implementation Challenges

et al. 2022

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“…Recent designs, such as the voltage-controlled bi-phasic sinusoidal FES, offer advantages in avoiding charge accumulation over time, ensuring safer and more efficient stimulation in biomedical contexts [2]. Furthermore, the exploration of multi-band programmable gain, especially in Raman amplifiers, has shown potential in achieving user-defined target gain profiles, leveraging machine learning frameworks for pump power settings [3]. These innovations underscore the evolving landscape of analog systems, particularly in bioelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a preset operational amplifier based on basic digital and analog hybrid circuit

Zhao

2024

ACE

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In the vast landscape of electronic engineering, the indispensable roles of both analog and digital circuits are unequivocally recognized. Analog circuits, with their foundational principles, are extensively harnessed in areas encompassing audio, video, power systems, and particularly, amplifiers. Conversely, digital circuits, integral to modern-day technological advancements, are dominantly present in computing platforms, telecommunication systems, control mechanisms, and data storage infrastructures. Amplifiers, a cornerstone in analog circuit designs, principally focus on magnifying the amplitude of input signals, whether it be in terms of voltage or current. This amplification process hinges on the strategic configuration of electronic elements such as transistors, resistors, and capacitors. This paper endeavors to marry the attributes of digital and analog circuits. Through the adept utilization of fundamental electronic components, an innovative amplifier design capable of preset amplification ratios is birthed. The practicality and efficacy of this amplifier are rigorously validated via its hands-on assembly and experimental testing in a laboratory setting. Results consistently underscore the amplifiers adeptness in delivering precise signal amplification, conforming to its predetermined ratios. Such a design, rooted in its simplicity yet offering profound versatility, beckons further exploration. It stands as a beacon for potential future adaptions, tailored to suit a gamut of applications, and is poised to seamlessly dovetail into more sophisticated circuit systems.

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“…[1][2][3][4][5][6][7][8][9] Numerous circuits like current conveyors, 10 voltage-controlled oscillators, 11 linear regulators, 12,13 switchedcapacitor circuit, 14 low-dropout regulator 15 and liquid crystal display drivers, [16][17][18] micro-electromechanical system sensors, 19 multipliers 20 use OTA for implementing their functionality. Indeed, important circuits like programmable gain amplifiers, 21,22 variable gain amplifiers, 21 filters, [23][24][25] modulators, 26,27 and transimpedance amplifiers 28,29 use OTAs to form systems on chip. In such systems, OTA is expected to improve current utilization and reduce power consumption, noise and voltage requirements.…”

Section: Introductionmentioning

confidence: 99%

Design of low‐voltage low‐noise operational transconductance amplifiers for low frequency applications

Sharma,

Kumar,

Madan

et al. 2024

Int J Numerical Modelling

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Low‐noise and low‐voltage operation is prime requirement of an operational transconductance amplifier for low frequency applications. However, achieving low‐noise operation at low supply voltages is a challenging task in CMOS technology owing to noise‐power and noise‐stability tradeoffs. This article outlines, the design of four differential bias self‐cascode (DBSC) operational transconductance amplifiers (OTAs) working at ±0.7 V. The four design techniques namely gate driven (GD), bulk driven (BD), bulk driven quasi‐floating gate (BDQFG), and gate driven quasi floating bulk (GDQFB) have been applied on DBSC OTAs. The designing aspects and performance parameters of these four OTAs such as gain, gain‐bandwidth, input referred noise (IRN), settling time (ST), common mode rejection ratio (CMRR), total harmonic distortion, input impedance, transconductance, power consumption, area consumption and process/mismatch variations have been fairly compared in this work. These DBSC OTAs have been designed and simulated using a standard 0.18‐μm 6M1P CMOS N‐well process. The results infer GD DBSC OTA shows high CMRR of 125.83 dB. While the BD DBSC OTA consumes very low power of 0.2 μW. The BDQFG DBSC OTA shows low 1% ST of 24.83 μS. The GDQFB DBSC OTA show high transconductance (2.35 mS), high gain (64.97 dB), and low IRN (0.40 μV/√Hz at 10 Hz). The theoretical predictions for these OTAs agree with the post‐layout simulations. The proposed OTAs can be used for designing various analog circuits such as programmable gain amplifiers, variable gain amplifiers, and transimpedance amplifiers for low‐frequency biomedical and health care applications.

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A Review of CMOS Variable Gain Amplifiers and Programmable Gain Amplifiers

Cited by 7 publications

References 71 publications

A Versatile SoC/SiP Sensor Interface for Industrial Applications: Implementation Challenges

A Versatile SoC/SiP Sensor Interface for Industrial Applications: Implementation Challenges

Design and implementation of a preset operational amplifier based on basic digital and analog hybrid circuit

Design of low‐voltage low‐noise operational transconductance amplifiers for low frequency applications

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