Results 31 to 40 of about 220,343 (297)

Energy-Efficient Amplifiers Based on Quasi-Floating Gate Techniques

open access: yesApplied Sciences, 2021
Energy efficiency is a key requirement in the design of amplifiers for modern wireless applications. The use of quasi-floating gate (QFG) transistors is a very convenient approach to achieve such energy efficiency.
Antonio Lopez-Martin   +5 more
doaj   +1 more source

Biosignal Amplifiers Based on Low‐Noise Organic Transistors with Printed Electrodes

open access: yesAdvanced Electronic Materials, 2023
The monitoring of microvolt‐level biosignals such as electroencephalograms requires the application of low‐noise signal amplifier circuits, which, for single‐use cases, must be fabricated for disposability using low‐cost manufacturing techniques.
Tomoharu Kimura   +5 more
doaj   +1 more source

Novel active-compensated weighted summer [PDF]

open access: yes, 1980
A summer amplifier with extended bandwidth is proposed. Compensation of the frequency characteristics is achieved by employing two operational amplifiers instead of external reactive ...
Huertas Díaz, José Luis   +1 more
core   +1 more source

A bulk-driven, buffer-biased, gain-boosted amplifier for biomedical signal enhancement

open access: yesCogent Engineering, 2019
The growing consciousness in health, biomedical research area is becoming most sought-after to develop or design medical devices by bringing biomedical researchers and clinicians to solve many health issues.
Sarin Vijay Mythry, D. Jackuline Moni
doaj   +1 more source

Transpermeance Amplifier Applied to Magnetic Bearings

open access: yesActuators, 2017
The most conventional approach of controlling magnetic forces in active magnetic bearings (AMBs) is through current feedback amplifiers: transconductance.
Jossana Ferreira   +2 more
doaj   +1 more source

Design of Radiation-Hardened Rare-Earth Doped Amplifiers Through a Coupled Experiment/Simulation Approach [PDF]

open access: yes, 2013
We present an approach coupling a limited experimental number of tests with numerical simulations regarding the design of radiation-hardened (RH) rare earth (RE)-doped fiber amplifiers.
Boscaino, Roberto   +15 more
core   +4 more sources

Triple buck converter – an efficient low-distortion switch-mode power amplifier topology

open access: yesThe Journal of Engineering, 2019
A switch-mode power amplifier topology that can achieve both a high conversion efficiency and low-output signal distortion is introduced. Such systems are desirable for ultra-high precision amplifiers that, for example, drive actuators in nanometre ...
Mario Mauerer   +2 more
doaj   +1 more source

Field patterns in periodically modulated optical parametric amplifiers and oscillators

open access: yes, 2007
Spatially localized and periodic field patterns in periodically modulated optical parametric amplifiers and oscillators are studied. In the degenerate case (equal signal and idler beams) we elaborate the systematic method of construction of the ...
Brazhnyi, V. A.   +3 more
core   +2 more sources

Mobile Phone Power Amplifier Linearity and Efficiency Enhancement Using Digital Predistortion [PDF]

open access: yes, 2003
The new generation mobile communication systems using spectrum efficient linear modulation schemes (QPSK,8PSK,QAM)need linear power amplifiers in the transmission path to have good ACPR and EVM values.
Ceylan, N.   +3 more
core   +1 more source

Variation in the Amplifier System Among Chinese L2 English Speakers in Australia

open access: yesLanguages
This study investigates the English adjective amplifier system of eleven Mandarin Chinese L2 speakers of English residing in Australia compared to a sample of ten native Australian English (AusE) speakers from the AusTalk corpus. Employing a variationist
Minghao Miao, Chloé Diskin-Holdaway
doaj   +1 more source

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