BE739518A - - Google Patents

Info

Publication number
BE739518A
BE739518A BE739518DA BE739518A BE 739518 A BE739518 A BE 739518A BE 739518D A BE739518D A BE 739518DA BE 739518 A BE739518 A BE 739518A
Authority
BE
Belgium
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.)
Filing date
Publication date
Application filed filed Critical
Publication of BE739518A publication Critical patent/BE739518A/xx

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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
BE739518D 1968-10-01 1969-09-29 BE739518A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76418768A 1968-10-01 1968-10-01

Publications (1)

Publication Number Publication Date
BE739518A true BE739518A (fr) 1970-03-02

Family

ID=25069932

Family Applications (1)

Application Number Title Priority Date Filing Date
BE739518D BE739518A (fr) 1968-10-01 1969-09-29

Country Status (7)

Country Link
US (1) US3536838A (fr)
BE (1) BE739518A (fr)
CA (1) CA925232A (fr)
DE (1) DE1948954B2 (fr)
FR (1) FR2019597A1 (fr)
GB (1) GB1290869A (fr)
SE (1) SE344001B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833766A (en) * 1972-10-18 1974-09-03 Global Syst Design Corp Voiced controlled gain switched loud-speaking telephone system
GB2064268B (en) * 1979-09-17 1983-10-26 Philips Nv Electronic signalling device for connection to a signal transmission line
US5239579A (en) * 1991-01-04 1993-08-24 Schuh Peter O Adaptive amplifier circuit
CN113447865B (zh) * 2021-06-01 2022-04-05 华东师范大学 一种超低磁场噪声的分级分流锁定磁场稳定系统

Also Published As

Publication number Publication date
DE1948954A1 (de) 1970-04-23
CA925232A (en) 1973-04-24
GB1290869A (fr) 1972-09-27
DE1948954B2 (de) 1971-07-22
FR2019597A1 (fr) 1970-07-03
SE344001B (fr) 1972-03-20
US3536838A (en) 1970-10-27

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: WESTERN ELECTRIC CY INC.

Effective date: 19890929