Device for converting a very-low-amplitude steady voltage signal into an alternating voltage signal
AssigneesFramatome, Centre National de la Recherche Scientifique (CNRS)
InventorsJacques Chaussy, Jean-Louis Bret, Bernard Picot, Jacques Meyer
Life of this patent
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Abstract
This device for converting a very-low-amplitude steady voltage signal into an alternating voltage signal, of the type comprising a centre-tapped transformer (1) associated with a transistor (3,4) chopper (2), is characterised in that the transformer (1) and the transistors (3,4) are arranged in a housing (15) held at very low temperature and in which is arranged a material (20) for thermal insulation of the transistors (3,4) with respect to the rest of the housing so as to reduce temperature fluctuations and allow operation of these transistors by self-heating due to their drive current.
Claims8
Device for converting of a very-low-amplitude steady voltage signal into an alternating voltage signal, of the type comprising a centre-tapped transformer (1) associated with a transistor (3,4) chopper (2), characterised in that the transformer (1) and the transistors (3,4) are arranged in a housing (15) held at very low temperature and in which is arranged a material (20) for thermal insulation of the transistors (3,4) with respect to the rest of the housing so as to reduce temperature fluctuations and allow operation of these transistors by self-heating due to their drive current.
Device according to any one of the preceding claims, characterised in that the transistors (3,4) are field-effect transistors.
Dependencies are inferred from the claim text.