EP0892272A3

Method and apparatus for measuring the mean square value of an electrical signal

Abstract

A method and apparatus for measuring the RMS value of an electrical signal. An electrical signal is converted to a digital signal. The digital signal is squared and low pass filtered to extract the DC component, the DC component being recognized as the mean-square of the signal. In use in a measurement device, the square root of the DC component is taken and displayed as the RMS value of the electrical signal.

EP0892272A3, drawing sheet 1 — Sheet 1 of 1

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Term ended

Projected expiry passed 8 July 2018, 8.2 years ago.

1 sheet

Sheet 1

Every citation, both waysCites: the store holds 5 of 6

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
EP0862060A2	Cites	European Patent Office (EPO)	E	Search report	1-4,9-12,17
DE19613736C1	Cites	Germany	PXPY	Search report	1-4,9-12,17
US4878185A	Cites	United States of America	A	Search report	1,9,17
US5377131A	Cites	United States of America	A	Search report	1,9,17
US5596609A	Cites	United States of America	A	Search report	5-8,13-16
HOGENAUER E B: "AN ECONOMICAL CLASS OF DIGITAL FILTERS FOR DECIMATION AND INTERPOLATION", IEEE TRANSACTIONS ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING,US,IEEE INC. NEW YORK, vol. 29, no. 2, 1 April 1981 (1981-04-01), pages 155 - 162, XP000560569	Non-patent	–	–	Search report	–

7 members in 5 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
896319	United States of America	–	1997-07-17
89631997	United States of America	A	1997-07-17
896319	–	–	–
US19970896319	–	–	–

Members7

Family members, oldest first
Document	Office	Kind
EP0892272A2	European Patent Office (EPO)	A2	1999-01-20
CN1206112A	China	A	1999-01-27
KR19990013873A	Republic of Korea	A	1999-02-25
JPH1195983A	Japan	A	1999-04-09
US6064193A	United States of America	A	2000-05-16
EP0892272A3This record	European Patent Office (EPO)	A3	2000-08-30
CN1149400C	China	C	2004-05-12

11 legal events, as the office reported them to INPADOC

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Events

Legal events, newest first
	Event	Code
2005-08-10	Application deemed to be withdrawnWithdrawn18D	18D
2005-06-24	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWNSTAA	STAA
2003-12-10	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1
2001-05-16	Designation fees paidDE FR GBAKX	AKX
2000-12-13	Request for examination filed17P	17P
2000-08-30	Designated contracting statesAK	AK
2000-08-30	Request for extension of the european patentAL;LT;LV;MK;RO;SIAX	AX
2000-07-14	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL
1999-01-20	Designated contracting statesAK	AK
1999-01-20	Request for extension of the european patentAL;LT;LV;MK;RO;SIAX	AX
1998-12-04	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI