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Hitachi Ltd
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Hitachi Ltd
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Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP10291675ApriorityCriticalpatent/JPS5227538A/en
Publication of JPS5227538ApublicationCriticalpatent/JPS5227538A/en
PURPOSE: A constant-voltage supply device employing a Zener diode having a monitoring function whereby any defect portion in a constant-voltage element can be located easily.