Results 81 to 90 of about 35,436 (308)

Development of a Free Space Optical Communication System Using the Delta-Sigma Modulation Method

open access: yes, 1994
P(論文)This paper describes development of a free space optical communication system with the delta-sigma modulation scheme. The delta-sigma modulater can convert analog signals into 1 bit digital signals whose SNR against the quantum noise is equal to ...
42552   +9 more
core  

Sigma-delta modulation circuits with digital assistance

open access: yes, 2016
CMOS technology scaling has enabled sustained performance improvements of electronic circuits through faster, highly integrated, and more energy efficient digital circuits.
Irfansyah, Astria Nur
core   +1 more source

Strain‐Programmable Luminescent Adhesive Patch With Tartrazine‐Mediated Optical Skin Clearing for Photochemical Tissue Bonding

open access: yesAdvanced Functional Materials, EarlyView.
We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim   +6 more
wiley   +1 more source

Quadrature error cancellation for micro-machined vibratory gyroscope embedded in high order electromechanical Sigma Delta modulator

open access: yes, 2013
Vibratory micro-machined gyroscopes utilize Coriolis force to detect the rotation rate. Recently it has been proved that embedding the gyroscope in an electromechanical ΣΔ modulator (EMSDM), results in increased linearity, rate detection range, and ...
Salimi, Pejwaak
core  

Sigma delta modulation of a chaotic signal [PDF]

open access: yes, 1996
Sigma delta modulation SDM has become a widespread method of analogue to digital conversion, however its operation has not been completely defined. The majority of the analysis carried out on the circuit has been from a linear standpoint, with non-linear
Ushaw, Gary
core  

Sigma Delta Modulation Based Ternary FIR Filter Mapping on FPGA [PDF]

open access: yesMehran University Research Journal of Engineering and Technology, 2011
In this paper single-bit SDM (Sigma Delta Modulation) based TFF (Ternary FIR Filter) with balanced ternary coefficients (i.e. -1/0/+1) has been mapped on small commercially available FPGAs (Field Programmable Gate Arrays).
Tayabuddin Memon   +2 more
doaj  

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

open access: yesAdvanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner   +14 more
wiley   +1 more source

Tissue‐Stimulator Platform for Electrically Stimulating Pancreatic β‐Cells for Long‐Term Functional Regulation

open access: yesAdvanced Functional Materials, EarlyView.
We present a tissue‐stimulator platform for seamless electrode integration with pancreatic tissue, applying uniform electrical stimulation through optimized design with biohybrid 3D printing. Advantageous effects of electrical stimulation on β‐cell function were observed, including enhanced calcium signaling, islet morphology, and maturation.
Jihwan Kim   +7 more
wiley   +1 more source

Design Optimization of Feedforward Equalization for Mobile Fronthaul Based on Delta-Sigma Modulation With High-Order QAM Signals

open access: yesIEEE Photonics Journal
Delta-sigma modulation can be used as a high spectral efficiency interface in place of conventional common public radio interface (CPRI) in mobile fronthaul (MFH) networks.
Jianghao Li   +2 more
doaj   +1 more source

Thermally Engineered Sodium‐Embedded Alumina with Programmable Synaptic Plasticity for Neuromorphic Transistors

open access: yesAdvanced Functional Materials, EarlyView.
A fully transparent, all‐metal‐oxide neuromorphic transistor using a sodium‐embedded alumina (SEA) electrolyte is demonstrated. By precisely tuning the thermal annealing process, the chemical composition of the SEA layer is controlled, allowing for the deterministic realization of both short‐term and long‐term synaptic plasticity within the same device
Yonghyun Albert Kwon   +7 more
wiley   +1 more source

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