CA2058536A1 - 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
CA2058536A1
CA2058536A1 CA002058536A CA2058536A CA2058536A1 CA 2058536 A1 CA2058536 A1 CA 2058536A1 CA 002058536 A CA002058536 A CA 002058536A CA 2058536 A CA2058536 A CA 2058536A CA 2058536 A1 CA2058536 A1 CA 2058536A1
Authority
CA
Canada
Prior art keywords
pulses
frequency
generating
clock
audio
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.)
Abandoned
Application number
CA002058536A
Other languages
English (en)
French (fr)
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
Kazuyuki Tsunoda
Nec Corporation
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 Kazuyuki Tsunoda, Nec Corporation filed Critical Kazuyuki Tsunoda
Publication of CA2058536A1 publication Critical patent/CA2058536A1/en
Abandoned 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)
CA002058536A 1990-12-29 1991-12-27 Radio pager tone alarm circuit for generating variable duty constant audio frequency pulses modulated with unique tone pattern Abandoned CA2058536A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2418502A JPH04227134A (ja) 1990-12-29 1990-12-29 無線選択呼出受信機
JP2-418502 1990-12-29

Publications (1)

Publication Number Publication Date
CA2058536A1 true CA2058536A1 (en) 1992-06-30

Family

ID=18526335

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002058536A Abandoned CA2058536A1 (en) 1990-12-29 1991-12-27 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 (ja)
JP (1) JPH04227134A (ja)
AU (1) AU649505B2 (ja)
CA (1) CA2058536A1 (ja)
DE (1) DE69124974T2 (ja)
HK (1) HK1002413A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09186744A (ja) * 1995-12-29 1997-07-15 Nec Corp 無線通信機
KR0173402B1 (ko) * 1996-05-18 1999-04-01 김광호 전화기의 링음량 제어방법
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 (fr) * 1974-10-09 1976-05-07 Daumas Sa Ets Installation d'alerte sonore selective
US4237448A (en) * 1979-04-30 1980-12-02 Motorola, Inc. Pager with escalating audio alert signal level
JPH0754990B2 (ja) * 1986-09-16 1995-06-07 日本電気株式会社 無線選択呼出し受信機のマルチ通報装置
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 (ja) 1992-08-17
AU649505B2 (en) 1994-05-26
EP0493973B1 (en) 1997-03-05
EP0493973A1 (en) 1992-07-08
AU9010291A (en) 1992-07-02
DE69124974D1 (de) 1997-04-10
DE69124974T2 (de) 1997-06-12

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued