EP0245955A3

Amplifying circuit arrangement

Abstract

A robust amplifier consists of two delay lines 12 and 23 linked by a number of discrete amplifiers 13. Distortion correction is carried out by distortion feed forward. This is achieved by sampling the output of each amplifier 13 at a coupler 17 and then subtracting this sample from the input signal to later amplifiers (13) along the delay line 12 at directional coupler 19. As a result each discrete amplifier's distortion is corrected by all of the following discrete amplifiers (13) in the amplifying circuit.

EP0245955A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 10 April 2007, 19.5 years ago.

1 sheet

Sheet 1

Citations
Document	Relation	Office	Category	Cited during
GB2056811A	Cites	United Kingdom	A	Search report

10 members in 5 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
8611965	United Kingdom	A	1986-05-16
8611965	United Kingdom	–	1986-05-16
8611965	–	–	–
GB19860011965	–	–	–

Members10

Family members, oldest first
Document	Office	Kind
GB8611965D0	United Kingdom	D0	1986-06-25
GB2190557A	United Kingdom	A	1987-11-18
EP0245955A2	European Patent Office (EPO)	A2	1987-11-19
US4743859A	United States of America	A	1988-05-10
EP0245955A3This record	European Patent Office (EPO)	A3	1989-02-08
GB2190557B	United Kingdom	B	1989-12-13
EP0245955B1	European Patent Office (EPO)	B1	1992-09-09
AT80507T	Austria	T	1992-09-15
DE3781584D1	Germany	D1	1992-10-15
DE3781584T2	Germany	T2	1993-01-07

45 legal events, as 3 offices reported them to INPADOC

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Events

Legal events, newest first
	Event	Code	Office
2005-04-10	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2002-02-01	Notification of lapseLapsedST	ST	FR
2001-04-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2000-07-21	Change of name or company nameCD	CD	FR
2000-07-21	Transmission of propertyTP	TP	FR
2000-04-11	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1996-01-03	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1995-12-15	Patent ceasedCeasedPL	PL	CH
1995-04-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1995-04-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1995-01-31	Se: european patent has lapsedLapsedEUG	EUG	EP
1994-12-16	Nl: lapsed or anulled due to non-payment of the annual feeLapsedNLV4	NLV4	EP
1994-11-01	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-10-31	Be: lapsedLapsedBERE	BERE	EP
1994-05-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1994-04-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-04-11	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-04-10	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-03-10	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1993-09-21	Lu: last paid annual feeEPTA	EPTA	EP
1993-09-01	No opposition filedOpposition26N	26N	EP
1993-07-10	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
1993-07-10	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
1993-04-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1993-04-23	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1993-03-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1993-03-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1992-12-31	Fr: translation filedET	ET	EP
1992-12-20	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1992-10-15	Corresponds to:REF	REF	EP
1992-10-02	It: translation for a ep patent filedITF	ITF	EP
1992-10-02	It: translation for a ep patent filedITF	ITF	EP
1992-09-09	Designated contracting statesAK	AK	EP
1992-09-09	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1992-09-09	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1992-09-09	Corresponds to:REF	REF	EP
1992-08-19	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
1992-07-24	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
1992-04-30	It: last paid annual feeITTA	ITTA	EP
1991-05-15	First examination report despatched17Q	17Q	EP
1989-08-02	Request for examination filed17P	17P	EP
1989-02-08	Designated contracting statesAK	AK	EP
1988-12-22	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1987-11-19	Designated contracting statesAK	AK	EP
1987-10-03	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Amplifying circuit arrangement

Abstract

Term

Priority claims4

Members10

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Events

Numbers

Titles3

Classification

Designated states12