EP1369997A3

Input/output buffer

Abstract

An input/output buffer that protects a circuit from voltage signals provided from an external device. The input/output buffer includes a reference power generation circuit (16) connected to a high voltage power supply and a low voltage power supply to convert the voltage of an external voltage signal and generate reference power. The reference power generation circuit (16) has a protection circuit (17) including a plurality of MOS transistors (Ptll-Ptl5) for decreasing the voltage of the external voltage signal to a predetermined voltage when the input/output buffer is not supplied with the voltage of the high voltage power supply. Each of the MOS transistors has a back gate connected to a predetermined node at which the voltage is less than the voltage of the high voltage power supply and greater than the voltage of the low voltage power supply.

EP1369997A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 18 February 2023, 3.6 years ago.

1 sheet

Sheet 1

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
US4460985A	Cites	United States of America	A	Search report	15,22
US5144585A	Cites	United States of America	A	Search report	1,18,20,23
US5304865A	Cites	United States of America	A	Search report	15,22
US5929539A	Cites	United States of America	A	Search report	1,18,20,23
US6008674A	Cites	United States of America	A	Search report	1,18,20,23
US6084462A	Cites	United States of America	A	Search report	15,22
US6157974A	Cites	United States of America	A	Search report	1,18,20,23
US6327635B1	Cites	United States of America	A	Search report	1,18,20,23

4 priority claims, no other members on record

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
2002159696	Japan	A	2002-05-31
2002159696	Japan	–	2002-05-31
2002159696	–	–	–
JP20020159696	–	–	–

42 legal events, as 3 offices reported them to INPADOC

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	Event	Code	Office
2018-01-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2018-01-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2017-12-01	Notification of lapseLapsedST	ST	FR
2017-09-01	Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119	R119	DE
2016-12-28	No opposition filedOpposition26N	26N	EP
2016-11-25	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2016-11-25	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2016-10-21	No opposition filed against granted patent, or epo opposition proceedings concluded without decisionGrantedR097	R097	DE
2016-06-09	Change of representativeR082	R082	DE
2016-06-06	Change of representativeR082	R082	DE
2016-05-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2016-04-29	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2016-03-15	Fee paymentPLFP	PLFP	FR
2016-03-03	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
2016-01-20	Designated contracting statesAK	AK	EP
2015-12-18	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2015-10-23	Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS	GRAS	EP
2015-08-26	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
2015-07-15	Intention to grant announcedINTG	INTG	EP
2015-06-16	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP	EP
2010-08-11	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
2009-01-14	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
2008-10-08	First examination report despatched17Q	17Q	EP
2005-10-05	Designation fees paidAKX	AKX	EP
2005-01-19	Designated contracting statesAK	AK	EP
2005-01-19	Request for extension of the european patentAX	AX	EP
2004-12-03	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
2004-11-24	Request for examination filed17P	17P	EP
2004-10-13	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2004-10-13	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2004-10-13	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2004-10-13	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2004-10-13	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2004-10-13	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2004-05-26	Deferred search report published (deleted)D17D	D17D	EP
2004-05-06	Designated contracting statesAK	AK	EP
2004-05-06	Request for extension of the european patentAX	AX	EP
2004-04-09	Information related to the publication of a search report (a3 document) modified or deletedORIGINAL CODE: 0009199SEPUPUAF	PUAF	EP
2004-03-19	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
2003-12-10	Designated contracting statesAK	AK	EP
2003-12-10	Request for extension of the european patentAX	AX	EP
2003-10-24	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Input/output buffer

Abstract

Term

Priority claims4

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Titles3

Classification

Designated states31