ES453482A1 - Un microfono para ser montado en un aparato telefonico de a-bonado. - Google Patents

Un microfono para ser montado en un aparato telefonico de a-bonado.

Info

Publication number
ES453482A1
ES453482A1 ES453482A ES453482A ES453482A1 ES 453482 A1 ES453482 A1 ES 453482A1 ES 453482 A ES453482 A ES 453482A ES 453482 A ES453482 A ES 453482A ES 453482 A1 ES453482 A1 ES 453482A1
Authority
ES
Spain
Prior art keywords
transducer
line
microphone
telephone microphone
amplifier
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
ES453482A
Other languages
English (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.)
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 ES453482A1 publication Critical patent/ES453482A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
ES453482A 1975-11-20 1976-11-19 Un microfono para ser montado en un aparato telefonico de a-bonado. Expired ES453482A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4776875A GB1525964A (en) 1975-11-20 1975-11-20 Telephone microphone

Publications (1)

Publication Number Publication Date
ES453482A1 true ES453482A1 (es) 1977-11-16

Family

ID=10446188

Family Applications (1)

Application Number Title Priority Date Filing Date
ES453482A Expired ES453482A1 (es) 1975-11-20 1976-11-19 Un microfono para ser montado en un aparato telefonico de a-bonado.

Country Status (6)

Country Link
AU (1) AU500321B2 (es)
ES (1) ES453482A1 (es)
GB (1) GB1525964A (es)
HK (1) HK61379A (es)
IE (1) IE43640B1 (es)
NZ (1) NZ182460A (es)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904096C2 (de) * 1979-02-03 1981-01-15 6000 Frankfurt Schaltungsanordnung für mit einem Verstärker-Netzwerk ausgerüstete Fernmeldeapparaturen
FR2494530B1 (fr) * 1980-11-17 1987-09-25 Horlogerie Photograph Fse Poste telephonique comportant un preamplificateur a courant porteur, un interrupteur de coupure de micro et un dispositif de signalisation de cette coupure
DE3244240C1 (de) * 1982-11-08 1984-03-15 Sodeco-Saia AG, 1211 Genève Fernsprechstelle mit niedrigem Speiseleistungsverbrauch
GB8317555D0 (en) * 1983-06-28 1983-08-03 Gibson Dawson J Microphone
RU2267236C2 (ru) * 2003-08-28 2005-12-27 Пинский Александр Генахович Способ формирования характеристик конденсаторного микрофона и устройство для его осуществления

Also Published As

Publication number Publication date
IE43640B1 (en) 1981-04-22
GB1525964A (en) 1978-09-27
HK61379A (en) 1979-09-07
AU1956776A (en) 1978-05-18
NZ182460A (en) 1980-08-26
AU500321B2 (en) 1979-05-17

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612