AU9010291A - Radio pager tone alarm circuit for generating variable duty constant audio frequency pulses modulated with unique tone pattern - Google Patents

Radio pager tone alarm circuit for generating variable duty constant audio frequency pulses modulated with unique tone pattern

Info

Publication number
AU9010291A
AU9010291A AU90102/91A AU9010291A AU9010291A AU 9010291 A AU9010291 A AU 9010291A AU 90102/91 A AU90102/91 A AU 90102/91A AU 9010291 A AU9010291 A AU 9010291A AU 9010291 A AU9010291 A AU 9010291A
Authority
AU
Australia
Prior art keywords
tone
audio frequency
alarm circuit
frequency pulses
variable duty
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
AU90102/91A
Other versions
AU649505B2 (en
Inventor
Kazuyuki Tsunoda
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Publication of AU9010291A publication Critical patent/AU9010291A/en
Application granted granted Critical
Publication of AU649505B2 publication Critical patent/AU649505B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B3/1025—Paging receivers with audible signalling details

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
AU90102/91A 1990-12-29 1991-12-30 Radio pager tone alarm circuit for generating variable duty constant audio frequency pulses modulated with unique tone pattern Ceased AU649505B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2418502A JPH04227134A (en) 1990-12-29 1990-12-29 Selective radio call receiver
JP2-418502 1990-12-29

Publications (2)

Publication Number Publication Date
AU9010291A true AU9010291A (en) 1992-07-02
AU649505B2 AU649505B2 (en) 1994-05-26

Family

ID=18526335

Family Applications (1)

Application Number Title Priority Date Filing Date
AU90102/91A Ceased AU649505B2 (en) 1990-12-29 1991-12-30 Radio pager tone alarm circuit for generating variable duty constant audio frequency pulses modulated with unique tone pattern

Country Status (6)

Country Link
EP (1) EP0493973B1 (en)
JP (1) JPH04227134A (en)
AU (1) AU649505B2 (en)
CA (1) CA2058536A1 (en)
DE (1) DE69124974T2 (en)
HK (1) HK1002413A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09186744A (en) * 1995-12-29 1997-07-15 Nec Corp Radio communication equipment
KR0173402B1 (en) * 1996-05-18 1999-04-01 김광호 Ring volume control method of telephone
US6433673B1 (en) 1998-09-25 2002-08-13 Conexant Systems, Inc. Digital enunciator, process and communication system employing same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2287732A1 (en) * 1974-10-09 1976-05-07 Daumas Sa Ets Selective sound alarm system - two low frequency sources to produce sound using binary memory
US4237448A (en) * 1979-04-30 1980-12-02 Motorola, Inc. Pager with escalating audio alert signal level
JPH0754990B2 (en) * 1986-09-16 1995-06-07 日本電気株式会社 Multi-report device for wireless selective call receiver
AU6718190A (en) * 1989-11-06 1991-05-31 Motorola, Inc. Selective call receiver

Also Published As

Publication number Publication date
HK1002413A1 (en) 1998-08-21
JPH04227134A (en) 1992-08-17
CA2058536A1 (en) 1992-06-30
AU649505B2 (en) 1994-05-26
EP0493973B1 (en) 1997-03-05
EP0493973A1 (en) 1992-07-08
DE69124974D1 (en) 1997-04-10
DE69124974T2 (en) 1997-06-12

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