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GB0022214D0 - A circuit for developing an ac ringing voltage from a dc voltage supply - Google Patents

A circuit for developing an ac ringing voltage from a dc voltage supply

Info

Publication number
GB0022214D0
GB0022214D0 GB0022214A GB0022214A GB0022214D0 GB 0022214 D0 GB0022214 D0 GB 0022214D0 GB 0022214 A GB0022214 A GB 0022214A GB 0022214 A GB0022214 A GB 0022214A GB 0022214 D0 GB0022214 D0 GB 0022214D0
Authority
GB
United Kingdom
Prior art keywords
voltage
developing
circuit
ringing
voltage supply
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
GB0022214A
Other versions
GB2358989B (en
GB2358989A (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.)
Lake Electronic Technologies Ltd
Original Assignee
Lake Electronic Technologies 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
Priority claimed from IES20000107 external-priority patent/IES20000107A2/en
Priority claimed from IE2000/0106A external-priority patent/IE83709B1/en
Application filed by Lake Electronic Technologies Ltd filed Critical Lake Electronic Technologies Ltd
Publication of GB0022214D0 publication Critical patent/GB0022214D0/en
Publication of GB2358989A publication Critical patent/GB2358989A/en
Application granted granted Critical
Publication of GB2358989B publication Critical patent/GB2358989B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
GB0022214A 2000-02-03 2000-09-11 A circuit for developing an ac ringing voltage from a dc voltage supply Expired - Fee Related GB2358989B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IES20000107 IES20000107A2 (en) 2000-02-03 2000-02-03 A circuit for developing an AC ringing voltage from a DC voltage supply
IE2000/0106A IE83709B1 (en) 2000-02-03 A circuit for developing an AC ringing voltage from a DC voltage supply

Publications (3)

Publication Number Publication Date
GB0022214D0 true GB0022214D0 (en) 2000-10-25
GB2358989A GB2358989A (en) 2001-08-08
GB2358989B GB2358989B (en) 2004-01-21

Family

ID=26320280

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0022214A Expired - Fee Related GB2358989B (en) 2000-02-03 2000-09-11 A circuit for developing an ac ringing voltage from a dc voltage supply

Country Status (1)

Country Link
GB (1) GB2358989B (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2383568A1 (en) * 1977-03-08 1978-10-06 Trt Telecom Radio Electr DEVICE INTENDED TO GENERATE A CALL SIGNAL AND CAN BE USED IN PARTICULAR IN A SUBSCRIBER JUNCOR
NL7802423A (en) * 1978-03-06 1979-09-10 Philips Nv POWER SUPPLY FOR A LINE CURRENT.
FR2422300A1 (en) * 1978-04-03 1979-11-02 Trt Telecom Radio Electr CONNECTOR CONTAINING A SYMMETRICAL POWER AMPLIFIER TO SUPPLY THE SUBSCRIBER LINE
US4500844A (en) * 1983-05-20 1985-02-19 At&T Bell Laboratories Ringing signal generator employing delta-modulation power amplification techniques
KR900001136B1 (en) * 1985-03-31 1990-02-27 가부시키가이샤 도시바 Power feeding system for telephone exchange
US5140630A (en) * 1991-05-01 1992-08-18 Light Logic, Ltd. Added main line apparatus
AU3744093A (en) * 1992-04-01 1993-11-08 Siemens Aktiengesellschaft Combined supply voltage connection and call A.C. voltage generator and connection for analog telephone receiver stations in extension installations

Also Published As

Publication number Publication date
GB2358989B (en) 2004-01-21
GB2358989A (en) 2001-08-08

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Legal Events

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

Effective date: 20100911