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Annular body for receiving windings for coils and transformers
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Circuit arrangement for a fluorescent lamp
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Electronic ballast for operating a low-pressure discharge lamp
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Process for producing conductor tracks
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Method of assembling a cutting contact
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Circuit arrangement to operate gas discharge lamp; has full bridge circuit supplied by direct current and has four controllable switches and circuit to control switches in normal and starting phases
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Electronic ballast for at least one low-pressure discharge lamp
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Electronic ballast for at least one low-pressure discharge lamp
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Electronic transformer for operating a load
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Process and device for the detection of the rectifier effect appearing in a gas discharge lamp
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Electronic lamp ballast
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Method for detecting a lamp change and electronic lamp ballast for operating gas-discharge lamps using such a method for detecting a lamp change
