HU187462B - Circuit arrangement for telephone set provided with receiver and hand set - Google Patents

Circuit arrangement for telephone set provided with receiver and hand set Download PDF

Info

Publication number
HU187462B
HU187462B HU307581A HU307581A HU187462B HU 187462 B HU187462 B HU 187462B HU 307581 A HU307581 A HU 307581A HU 307581 A HU307581 A HU 307581A HU 187462 B HU187462 B HU 187462B
Authority
HU
Hungary
Prior art keywords
circuit
amplifier
fork
differential amplifier
resistors
Prior art date
Application number
HU307581A
Other languages
German (de)
English (en)
Hungarian (hu)
Inventor
Helmut Kammholz
Claus-Peter Kaufmann
Hans F Strasser
Original Assignee
Veb Fernmeldewerk Nordhausen,Dd
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 Veb Fernmeldewerk Nordhausen,Dd filed Critical Veb Fernmeldewerk Nordhausen,Dd
Publication of HU187462B publication Critical patent/HU187462B/hu

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Telephone Set Structure (AREA)
HU307581A 1980-12-23 1981-10-22 Circuit arrangement for telephone set provided with receiver and hand set HU187462B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD22657380A DD154419A1 (de) 1980-12-23 1980-12-23 Schaltungsanordnung fuer einen fernsprechapparat mit mithoer-und freisprecheinrichtung

Publications (1)

Publication Number Publication Date
HU187462B true HU187462B (en) 1986-01-28

Family

ID=5528312

Family Applications (1)

Application Number Title Priority Date Filing Date
HU307581A HU187462B (en) 1980-12-23 1981-10-22 Circuit arrangement for telephone set provided with receiver and hand set

Country Status (6)

Country Link
CS (1) CS247107B1 (enrdf_load_stackoverflow)
CU (1) CU21478A3 (enrdf_load_stackoverflow)
DD (1) DD154419A1 (enrdf_load_stackoverflow)
DE (1) DE3129506A1 (enrdf_load_stackoverflow)
HU (1) HU187462B (enrdf_load_stackoverflow)
RO (1) RO85240B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307552A1 (de) * 1983-03-03 1984-09-06 Hans Widmaier Fabrik für Apparate der Fernmelde- und Feinwerktechnik, 8000 München Schaltung zur pfeifunterdrueckung bei fernsprechapparaten mit lauthoerverstaerker
DE3329476A1 (de) * 1983-08-16 1985-03-07 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung zur einschaltung von steuereinrichtungen bei fernsprechapparaten
DE3505213A1 (de) * 1985-02-15 1986-08-21 Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg Schaltung in einem fernsprechapparat
DE4329638C2 (de) * 1993-09-02 1996-10-24 Telefunken Microelectron Lauthöreinrichtung
DE29614668U1 (de) 1996-08-24 1996-11-14 Kroos, Heinz Thomas, 33129 Delbrück Freisprecheinheit für Mobiltelefone (Handys)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL155700B (nl) * 1971-12-08 1978-01-16 Philips Nv Luidsprekende telefooninrichting.
DE2607016A1 (de) * 1976-02-19 1977-08-25 Manfred Lau Elektronischer telefonverstaerker
FR2376576A1 (fr) * 1976-12-31 1978-07-28 Girard J Philippe Perfectionnements aux postes telephoniques a mains libres

Also Published As

Publication number Publication date
RO85240B (ro) 1984-10-30
CU21478A3 (en) 1987-10-12
DE3129506C2 (enrdf_load_stackoverflow) 1989-09-07
CS247107B1 (en) 1986-11-13
RO85240A (ro) 1984-09-29
DE3129506A1 (de) 1982-07-01
CS752581A1 (en) 1985-06-13
DD154419A1 (de) 1982-03-17

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Legal Events

Date Code Title Description
HU90 Patent valid on 900628
HMM4 Cancellation of final prot. due to non-payment of fee