GB9921595D0 - Recognition of a voltage polarity reversal - Google Patents

Recognition of a voltage polarity reversal

Info

Publication number
GB9921595D0
GB9921595D0 GBGB9921595.6A GB9921595A GB9921595D0 GB 9921595 D0 GB9921595 D0 GB 9921595D0 GB 9921595 A GB9921595 A GB 9921595A GB 9921595 D0 GB9921595 D0 GB 9921595D0
Authority
GB
United Kingdom
Prior art keywords
recognition
polarity reversal
voltage polarity
voltage
reversal
Prior art date
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.)
Granted
Application number
GBGB9921595.6A
Other versions
GB2341992A (en
GB2341992B (en
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB9921595D0 publication Critical patent/GB9921595D0/en
Publication of GB2341992A publication Critical patent/GB2341992A/en
Application granted granted Critical
Publication of GB2341992B publication Critical patent/GB2341992B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1536—Zero-crossing detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Manipulation Of Pulses (AREA)
GB9921595A 1998-09-22 1999-09-13 Recognition of a voltage polarity reversal Expired - Fee Related GB2341992B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1998143477 DE19843477C1 (en) 1998-09-22 1998-09-22 Circuit arrangement for detecting a voltage reversal

Publications (3)

Publication Number Publication Date
GB9921595D0 true GB9921595D0 (en) 1999-11-17
GB2341992A GB2341992A (en) 2000-03-29
GB2341992B GB2341992B (en) 2003-06-04

Family

ID=7881864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9921595A Expired - Fee Related GB2341992B (en) 1998-09-22 1999-09-13 Recognition of a voltage polarity reversal

Country Status (3)

Country Link
DE (1) DE19843477C1 (en)
GB (1) GB2341992B (en)
NL (1) NL1013119C2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613590C2 (en) * 1976-03-30 1977-10-27 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for evaluating changes in status on lines in telecommunication systems, in particular telephone systems
US4323734A (en) * 1980-05-15 1982-04-06 Crest Industries, Inc. Interface circuit for telephone line to equipment signal coupling
DE3706253A1 (en) * 1987-02-26 1988-09-08 Siemens Ag Circuit arrangement for telecommunications systems, in particular telephone switching systems, with DC voltage feed of switching devices via connection lines
JPH0396057A (en) * 1989-09-07 1991-04-22 Matsushita Electric Ind Co Ltd Polarity inversion detection circuit
US5640113A (en) * 1994-05-06 1997-06-17 The Watt Stopper Zero crossing circuit for a relay
US5606273A (en) * 1996-03-28 1997-02-25 Caterpillar Inc. Zero crossing detector circuit
US5905794A (en) * 1996-10-15 1999-05-18 Multi-Tech Systems, Inc. Caller identification interface using line reversal detection

Also Published As

Publication number Publication date
NL1013119C2 (en) 2004-09-09
GB2341992A (en) 2000-03-29
NL1013119A1 (en) 2000-03-24
DE19843477C1 (en) 2000-05-31
GB2341992B (en) 2003-06-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030913