Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shindengen Electric Manufacturing Co Ltd
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Oki Electric Industry Co Ltd
NTT Inc
Original Assignee
Shindengen Electric Manufacturing Co Ltd
Fujitsu Ltd
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shindengen Electric Manufacturing Co Ltd, Fujitsu Ltd, Hitachi Ltd, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co LtdfiledCriticalShindengen Electric Manufacturing Co Ltd
Priority to JP14108182ApriorityCriticalpatent/JPS5932320A/ja
Publication of JPS5932320ApublicationCriticalpatent/JPS5932320A/ja
Publication of JPS6332019B2publicationCriticalpatent/JPS6332019B2/ja
Operational amplifier protection circuit using, either in working conditions or at start-up, identical circuit elements for detecting permanent output abnormal conditions