GB953059A - Improvements in or relating to detecting circuit arrangements - Google Patents

Improvements in or relating to detecting circuit arrangements

Info

Publication number
GB953059A
GB953059A GB1612560A GB1612560A GB953059A GB 953059 A GB953059 A GB 953059A GB 1612560 A GB1612560 A GB 1612560A GB 1612560 A GB1612560 A GB 1612560A GB 953059 A GB953059 A GB 953059A
Authority
GB
United Kingdom
Prior art keywords
stage
transistor
sequence
reception
frequency corresponding
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
GB1612560A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB953059A publication Critical patent/GB953059A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
    • 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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Selective Calling Equipment (AREA)

Abstract

953,059. Electric selective signalling systems. PHILIPS ELECTRICAL INDUSTRIES Ltd. May 6, 1960 [May 9, 1959], No. 16125/59. Heading G4H. A selective system for receiving a sequence of different frequencies comprises a plurality of stages, one for each frequency in a sequence, similar to that shown in Fig. 1 and which comprises a tuned circuit 1, and a monostable trigger circuit including transistors 9, 19, of which transistor 19 is normally conducting. Diode 6 is omitted from the first stage, and on reception of the frequency corresponding to this stage, the signal induced in secondary winding 8 is rectified by transistor 9 and transistor 19 is cut off, thereby blocking diode 6<SP>1</SP> of the succeeding stage for a period determined by the time constant of network 18, 20. Reception of the signal frequency corresponding to the next stage within this period prepares the following stage, and so on. The outputs of transistors 9 may also be used through interconnected gating circuits 22, 23 to operate a number of triggers, one for each stage, simultaneously by transmitting all frequencies after the entire sequence has been received. Specifications 778,152 and 919,172 are referred to.
GB1612560A 1959-05-09 1960-05-06 Improvements in or relating to detecting circuit arrangements Expired GB953059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN16750A DE1090273B (en) 1959-05-09 1959-05-09 Circuit arrangement for evaluating signals of different frequencies in telecommunications systems

Publications (1)

Publication Number Publication Date
GB953059A true GB953059A (en) 1964-03-25

Family

ID=7340268

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1612560A Expired GB953059A (en) 1959-05-09 1960-05-06 Improvements in or relating to detecting circuit arrangements

Country Status (3)

Country Link
DE (1) DE1090273B (en)
DK (1) DK107298C (en)
GB (1) GB953059A (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL81161C (en) * 1950-07-21
DE899373C (en) * 1952-04-22 1953-12-10 Telefonbau & Normalzeit Gmbh Circuit arrangement for advancing charge displays assigned to the subscriber lines
NL109525C (en) * 1957-03-14

Also Published As

Publication number Publication date
DE1090273B (en) 1960-10-06
DK107298C (en) 1967-05-16

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