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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 JP8506277ApriorityCriticalpatent/JPS5420686A/en
Publication of JPS5420686ApublicationCriticalpatent/JPS5420686A/en
PURPOSE: To improve accuracy by providing a temperature compensating means in the same manner as amplifier circuit to the voltage supplying means of a photo detector circuit.