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EP About this file: EP0809351

EP0809351 - Differential amplifier circuit [Right-click to bookmark this link]
Status	The application is deemed to be withdrawn Status updated on 28.01.2000 Database last updated on 24.04.2024
Most recent event Tooltip	25.07.2008	Change - representative	published on 27.08.2008 [2008/35]
Applicant(s)	For all designated states NEC Corporation 7-1, Shiba 5-chome Minato-ku Tokyo 108-8001 / JP
	[N/P]
Former [1997/48]	For all designated states NEC CORPORATION 7-1, Shiba 5-chome Minato-ku Tokyo / JP
Inventor(s)	01 / Kimura, Katsuji c/o NEC Corporation, 7-1, Shiba 5-chome Minato-ku, Tokyo / JP
	[1997/48]
Representative(s)	Vossius & Partner Patentanwälte Rechtsanwälte mbB Siebertstrasse 3 81675 München / DE
	[N/P]
Former [2008/35]	Vossius & Partner Siebertstrasse 3 81675 München / DE
Former [1997/48]	VOSSIUS & PARTNER Siebertstrasse 4 81675 München / DE
Application number, filing date	97113589.2	08.12.1993
	[1997/48]
Priority number, date	JP19920351747	08.12.1992 Original published format: JP 35174792
	[1997/48]
Filing language	EN
Procedural language	EN
Publication	Type:	A2 Application without search report
	No.:	EP0809351
	Date:	26.11.1997
	Language:	EN
	[1997/48]
	Type:	A3 Search report
	No.:	EP0809351
	Date:	04.03.1998
	[1998/10]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	12.01.1998
Classification	IPC:	H03F1/32	[1997/48]
	CPC:	H03F1/3211 (EP,US)
Designated contracting states	DE, FR, GB, IT, NL, SE [1997/48]
Title	German:	Differenzverstärkerschaltung	[1997/48]
	English:	Differential amplifier circuit	[1997/48]
	French:	Circuit amplificateur différentiel	[1997/48]
Examination procedure	21.01.1998	Examination requested [1998/12]
	05.05.1999	Despatch of a communication from the examining division (Time limit: M04)
	16.09.1999	Application deemed to be withdrawn, date of legal effect [2000/11]
	19.10.1999	Despatch of communication that the application is deemed to be withdrawn, reason: reply to the communication from the examining division not received in time [2000/11]
Parent application(s) Tooltip	EP93119773.5 / EP0601560
Fees paid	Renewal fee
	06.08.1997	Renewal fee patent year 03
	06.08.1997	Renewal fee patent year 04
	30.12.1997	Renewal fee patent year 05
	29.12.1998	Renewal fee patent year 06
Opt-out from the exclusive Tooltip competence of the Unified Patent Court	See the Register of the Unified Patent Court for opt-out data
	Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Documents cited:	Search	[A]GB2061046 (TOKYO SHIBAURA ELECTRIC CO) [A] * page 1, line 42 - page 3, line 31; figures 1,2 *;
		[Y]DE3027071 (PHILIPS PATENTVERWALTUNG [DE]) [Y] 1 * page 8, line 17 - page 9, line 29; figure 1 *;
		[A]US4460872 (MATTISSON SVEN [SE]) [A] 1 * column 4, line 23 - line 65; figure 4 *;
		[A]GB2195211 (PLESSEY CO PLC) [A] 1 * page 1, line 87 - line 130; figure 5 *;
		[Y]EP0312016 (TOSHIBA KK [JP]) [Y] 1 * page 5, line 7 - line 35; figure 5 *;
		[A]EP0352009 (SONY CORP [JP]) [A] 1,4 * page 4, line 1 - line 46; figure 2 *;
		[AP]US5214329 (FURINO JR JAMES P [US]) [AP] 1-3 * column 3, line 10 - line 50; figure 2 *;
		[Y] - HIROSHI TANIMOTO ET AL, "REALIZATION OF A 1-V ACTIVE FILTER USING A LINEARIZATION TECHNIQUE EMPLOYING PLURALITY OF EMITTER-COUPLED PAIRS", IEEE JOURNAL OF SOLID-STATE CIRCUITS, (19910701), vol. 26, no. 7, pages 937 - 944, XP000237035 [Y] 1,4 * page 938, paragraphs A-D - page 939 * DOI: http://dx.doi.org/10.1109/4.92013
		[Y] - DE VEIRMAN G A ET AL, "DESIGN OF A BIPOLAR 10-MHZ PROGRAMMABLE CONTINUOUS-TIME 0.05 EQUIRIPPLE LINEAR PHASE FILTER", IEEE JOURNAL OF SOLID-STATE CIRCUITS, (19920301), vol. 27, no. 3, pages 324 - 331, XP000295882 [Y] 4 * page 326; figure 4 * DOI: http://dx.doi.org/10.1109/4.121554
		[A] - KOYAMA, M. ET AL, "A 10.7 MHz continuous-time bandpass filter bipolar IC", PROCEEDINGS OF THE IEEE 1989 CUSTOM INTEGRATED CIRCUITS CONFERENCE, NEW YORK USA, (1989), pages 25.2.1 - 25.2.4, XP002050487 [A] 1,4 * page 25.2.1 - page 25.2.3; figure 4 *

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