NL31723C - - Google Patents

Info

Publication number
NL31723C
NL31723C NL31723DA NL31723C NL 31723 C NL31723 C NL 31723C NL 31723D A NL31723D A NL 31723DA NL 31723 C NL31723 C NL 31723C
Authority
NL
Netherlands
Application number
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.)
Publication of NL31723C publication Critical patent/NL31723C/xx
Priority claimed from DES89676D external-priority patent/DE504122C/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Transmitters (AREA)
  • Radio Relay Systems (AREA)
NL31723D 1929-01-28 NL31723C (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES89676D DE504122C (de) 1929-01-28 1929-01-28 UEbertragungssystem mit Gegenverkehr und Rueckkopplungssperrern
DES93060D DE507138C (de) 1929-01-28 1929-07-27 UEbertragungssystem mit Gegenverkehr und Rueckkopplungssperrung

Publications (1)

Publication Number Publication Date
NL31723C true NL31723C (ja)

Family

ID=25997582

Family Applications (1)

Application Number Title Priority Date Filing Date
NL31723D NL31723C (ja) 1929-01-28

Country Status (6)

Country Link
US (1) US1962026A (ja)
BE (1) BE371008A (ja)
DE (1) DE507138C (ja)
FR (1) FR688929A (ja)
GB (2) GB345016A (ja)
NL (1) NL31723C (ja)

Also Published As

Publication number Publication date
US1962026A (en) 1934-06-05
GB345016A (en) 1931-03-19
FR688929A (fr) 1930-08-30
DE507138C (de) 1930-11-27
BE371008A (ja)
GB346875A (en) 1931-04-23

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