GB899950A - Signal responsive apparatus - Google Patents

Signal responsive apparatus

Info

Publication number
GB899950A
GB899950A GB4418159A GB4418159A GB899950A GB 899950 A GB899950 A GB 899950A GB 4418159 A GB4418159 A GB 4418159A GB 4418159 A GB4418159 A GB 4418159A GB 899950 A GB899950 A GB 899950A
Authority
GB
United Kingdom
Prior art keywords
ringing current
passing
ringing
transformers
signal responsive
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.)
Expired
Application number
GB4418159A
Inventor
Edward Harold Norman
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to GB4418159A priority Critical patent/GB899950A/en
Publication of GB899950A publication Critical patent/GB899950A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/42—Circuits for by-passing of ringing signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

899,950. By-passing ringing signals. ERICSSON TELEPHONES Ltd. Oct. 7, 1960 [Dec. 30, 1959], No. 44181/59. Class 40 (4). [Also in Group XL (b)] A transformer 10 suitable for passing lowvoltage high frequencies, is provided with centre-connected capacitors for blocking lowfrequency ringing current, which, however, by virtue of its high voltage exceeds the threshold of the non-linear devices 27...30 which thereby provide an alternative path for the ringing current. The arrangement permits of the use of smaller transformers. The by-pass circuits may instead be connected to the other ends of the transformer windings, Fig. 1 (not shown), but this may result in the saturation of the core by the ringing current if the transformers are other than 1: 1.
GB4418159A 1959-12-30 1959-12-30 Signal responsive apparatus Expired GB899950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4418159A GB899950A (en) 1959-12-30 1959-12-30 Signal responsive apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4418159A GB899950A (en) 1959-12-30 1959-12-30 Signal responsive apparatus

Publications (1)

Publication Number Publication Date
GB899950A true GB899950A (en) 1962-06-27

Family

ID=10432146

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4418159A Expired GB899950A (en) 1959-12-30 1959-12-30 Signal responsive apparatus

Country Status (1)

Country Link
GB (1) GB899950A (en)

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