Search results for "Low offset"

showing 2 items of 2 documents

Different progenitors of short hard gamma-ray bursts

2007

We consider the spatial offsets of short hard gamma-ray bursts (SHBs) from their host galaxies. We show that all SHBs with extended duration soft emission components lie very close to their hosts. We suggest that NS-BH binary mergers offer a natural explanation for the properties of this extended duration/low offset group. SHBs with large offsets have no observed extended emission components and are less likely to have an optically detected afterglow, properties consistent with NS-NS binary mergers occurring in low density environments.

PhysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Low offsetFOS: Physical sciencesBinary numberAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsGalaxyAfterglowSpace and Planetary ScienceLow densityGamma-ray burstAstrophysics::Galaxy Astrophysics
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Novel constant current driver for ISFET/MEMFETs characterization

2001

Abstract In the present work a new constant current driver for ISFETs and MEMFETs sensors has been developed. The proposed circuit maintains the ISFET/MEMFET operation point at constant drain–source current and voltage. The combination of some programmable current sources and an appropriate selection of a simple precision resistor allow a good ISFET/MEMFET polarization. The use of operational amplifiers with low offset and drift are required to provide the buffering function needed by the sensor.

business.industryComputer scienceMetals and AlloysLow offsetElectrical engineeringCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsOperation pointlaw.inventionlawHardware_INTEGRATEDCIRCUITSMaterials ChemistryOperational amplifierConstant currentElectrical and Electronic EngineeringISFETResistorbusinessInstrumentationVoltageSensors and Actuators B: Chemical
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