ES458361A1 - Un generador de multifrecuencia. - Google Patents

Un generador de multifrecuencia.

Info

Publication number
ES458361A1
ES458361A1 ES458361A ES458361A ES458361A1 ES 458361 A1 ES458361 A1 ES 458361A1 ES 458361 A ES458361 A ES 458361A ES 458361 A ES458361 A ES 458361A ES 458361 A1 ES458361 A1 ES 458361A1
Authority
ES
Spain
Prior art keywords
time base
frequencies
frequency
generation
programmed memory
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
ES458361A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES458361A1 publication Critical patent/ES458361A1/es
Expired 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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
ES458361A 1976-05-03 1977-05-02 Un generador de multifrecuencia. Expired ES458361A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7613123A FR2350753A1 (fr) 1976-05-03 1976-05-03 Generateur de frequences

Publications (1)

Publication Number Publication Date
ES458361A1 true ES458361A1 (es) 1978-02-16

Family

ID=9172602

Family Applications (1)

Application Number Title Priority Date Filing Date
ES458361A Expired ES458361A1 (es) 1976-05-03 1977-05-02 Un generador de multifrecuencia.

Country Status (2)

Country Link
ES (1) ES458361A1 (enrdf_load_html_response)
FR (1) FR2350753A1 (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504754A1 (fr) * 1981-04-27 1982-10-29 Thomson Csf Mat Tel Dispositif sequenceur a memoires mortes

Also Published As

Publication number Publication date
FR2350753B1 (enrdf_load_html_response) 1982-04-02
FR2350753A1 (fr) 1977-12-02

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19991007