Results 31 to 40 of about 5,748,011 (307)
High Efficiency Power Amplifier Based on Envelope Elimination and Restoration Technique [PDF]
, 2010 Due to complex envelope and phase modulation employed in modern transmitters it is necessary to use power amplifiers that have high linearity. Linear power amplifiers (classes A, B and AB) are commonly used, but they suffer from low efficiency especially
Alou Cervera, Pedro +9 more
core
Organoids in pediatric cancer research
FEBS Letters, EarlyView.Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley +1 more source
Majlesi Journal of Electrical Engineering, 2023 A Harmonic Control Circuit (HCC) is one of the most important blocks in the Class-F power amplifiers, which should pass the even harmonics and suppress the odd harmonics.
Rasoul Azadi +3 more
doaj +1 more source
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
Co-Design Block PA (Power Amplifier)-Antenna for 5G Application at 28 GHz Frequency Band
, 2022 This subject addresses the issue related to Transmitters for the new communication standard, namely 5G. Indeed to respond to the problems of radio coverage, the speed of services as well as the rise in user demand, transmitters must have ideal characteristics to be able to meet these requirements. This chapter proposes in order to answer such a problem
Ange Joel Nounga Njanda +1 more
openaire +2 more sources
System modeling of CMOS power amplifier employing envelope and average power tracking for efficiency enhancement [PDF]
, 2013 textIn the past decade, there has been great motivation to improve the efficiency of power amplifiers (PAs) in handset transmitter systems in order to address critical issues such as poor battery life and excessive heat.
Tintikakis, Dimitri
core
Design of an E-band Doherty Power amplifier
, 2018 This paper demonstrates the design of an E-band Doherty power amplifier (PA) based in an 130nm SiGe BiCMOS process. This design includes main and auxiliary amplifiers, lange coupler and a pre-amplifier.
Parveg, Dristy +9 more
core +1 more source
From mice to humans—divergent strategies for intestinal homeostasis and regeneration
FEBS Letters, EarlyView.Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa +2 more
wiley +1 more source
High Efficient CMOS Class-E Power Amplifier with a New Output Power Control Scheme [PDF]
Journal of Electrical and Electronics Engineering, 2013 This paper presents the design of a novel RF power amplifier (PA) with a new output power control scheme suitable for RF-ICs and portable systems. Employing a class-E amplifier as a drivertogether with soft-switching property of the main power stage ...
MESHKIN Reza +3 more
doaj
Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential
FEBS Letters, EarlyView.Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta +3 more
wiley +1 more source