Ultra-Low-Power, Wide Dynamic Range Front-End Logarithmic Amplifier for Biomedical Applications

Zareie, Mahsa; Hosseinnejad, Mahdi; Azhari, Seyed Javad

doi:10.1109/kbei.2019.8734993

Cited by 6 publications

(7 citation statements)

References 19 publications

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“…This logarithmic amplifier dissipates just 3.36W since the bulk of transistors operate in subthreshold region, according to the simulation results shown in [7]. According to Figure 4, which plots the frequency response, the voltage gain in the roughly 0.2Hz to 10kHz frequency range is 62dB.…”

Section: Simulation Resultsmentioning

confidence: 77%

“…A kind of front-end logarithmic amplifier with ultra low power consumption and wide dynamic range was proposed in [7]. Parallel-amplification structure as well as parallel-summation structure are applied to it and the corresponding circuit structure are shown in Figure 1.…”

Section: Circuit Structurementioning

confidence: 99%

“…Noise is also a key factor to be considered when optimizing amplifiers' performance. In this design [7], in order to cancel the DC offset voltage, in other words, to reduce low frequency flicker noise and eliminate EDO, a high-pass cut-off frequency is required. Therefore, ultra-low frequency signal components have been suppressed by using RC filter.…”

Section: Circuit Structurementioning

confidence: 99%

“…Signals from extracellular systems must be amplified because they are so weak without amplification [6]. On the other hand, the voltage of input signals can vary in a very wide range, for instance, the output voltage of the mentioned amplifier [7] ranges from 17 to 560 mV and its input dynamic range is 84 dB, as a result, it narrows the output's dynamic range to 32 dB by compressing the input signal. For RF applications, they operate at very high frequency, but radio-frequency amplifier (PA) cannot amplify the signal received by the antenna, while low noise amplifier (LNA) can, for instance, in Radio Frequency Receiver system, the weak signal can be amplified with no noise by LNA amplifies and then be feed as input to Mixer [3].…”

Section: Parameter Characteristics Of Signalsmentioning

confidence: 99%

“…Not only that, logarithmic amplifier is applied to biomedical applications gradually because of their great character. In the mentioned amplifier [7], a type of logarithmic amplifier that used for biomedical applications is introduced. The single stage type and piecewise approximation type constitute the foundation for the realization of logarithmic amplifiers.…”

Section: Types Of Amplifiers and Used Topologiesmentioning

confidence: 99%

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Contrastive Analysis of Low Power Low Noise Amplifiers Used in Three Different Applications

Cao¹

2022

HSET

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In this paper, three kinds of low power low noise amplifier used respectively in biomedical applications, RF receivers and ultra-wideband (UWB) applications are compared and analyzed. Their prime simulation results are showed as well. Since, their application fields are different, the parameter characteristics of signals as well as their circuit structures and used topologies are various. In order to analyze them more clearly and distinctly, on one hand, the parameter characteristics of signals, which is vital factor when decide circuit structures and used topologies, are compared. On the other hand, their circuit structures and used topologies are introduced and qualitatively compared while their performance, such as band width, gain, noise, power, supply voltage, are quantitatively compared. Folded-cascode topology, current reused topology, inverter-based shunt feedback topology, and parallel summation structure are analysed in this paper.

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Section: Simulation Resultsmentioning

confidence: 77%

Section: Circuit Structurementioning

confidence: 99%

Section: Circuit Structurementioning

confidence: 99%

Section: Parameter Characteristics Of Signalsmentioning

confidence: 99%

Section: Types Of Amplifiers and Used Topologiesmentioning

confidence: 99%

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Contrastive Analysis of Low Power Low Noise Amplifiers Used in Three Different Applications

Cao¹

2022

HSET

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CMOS Analog Simulators of Dynamical Systems

Araújo,

Oliveira,

Guerreiro

et al. 2024

IEEE Access

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Analog computing is based upon using physical processes to solve formal mathematical problems. In the past, it was the predominant instrument of scientific calculations. Now, as the physical limits imposed on digital devices compel research into alternate computing paradigms, a reexamination of the potentialities of analog computing is warranted. This work studies the application of analog CMOS cells toward the simulation of dynamical systems, and, more generally, solving sets of coupled time-dependent ordinary differential equations. Following a brief review of the fundamentals of systems theory and analog computing, the main set of computing elements is introduced, each comprising analog cells designed in a 130 nm process. These are subsequently applied to the realization of practical, special-purpose analog computing modules. Illustrative systems from various fields are selected for simulation. Though by no means comprehensive, these case studies highlight the capabilities of contemporary analog computing, especially in solving nonlinear problems. Circuit simulations show good agreement with solutions obtained from highorder numerical methods, at least over a limited range of system parameters. The article concludes with a brief discussion of broader analog computing applications, offering future prospects toward further exploration of its potentialities and limitations in a wide range of domains.INDEX TERMS Analog computers, differential equations, dynamical systems, integrated circuits.

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Design and Simulation of Ultra-Low-Power Parallel Summation Logarithmic Amplifier

Ahuja

Mehta

2022

2022 IEEE International Conference of Electron Devices Society Kolkata Chapter (EDKCON)

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Ultra-Low-Power, Wide Dynamic Range Front-End Logarithmic Amplifier for Biomedical Applications

Cited by 6 publications

References 19 publications

Contrastive Analysis of Low Power Low Noise Amplifiers Used in Three Different Applications

Contrastive Analysis of Low Power Low Noise Amplifiers Used in Three Different Applications

CMOS Analog Simulators of Dynamical Systems

Design and Simulation of Ultra-Low-Power Parallel Summation Logarithmic Amplifier

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