GB343486A - Process for influencing the transmission equivalent of discharge tubes, amplifiers or the like - Google Patents

Process for influencing the transmission equivalent of discharge tubes, amplifiers or the like

Info

Publication number
GB343486A
GB343486A GB3510429A GB3510429A GB343486A GB 343486 A GB343486 A GB 343486A GB 3510429 A GB3510429 A GB 3510429A GB 3510429 A GB3510429 A GB 3510429A GB 343486 A GB343486 A GB 343486A
Authority
GB
United Kingdom
Prior art keywords
voice
amplifiers
frequency
suppressors
echo
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
GB3510429A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB343486A publication Critical patent/GB343486A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

343,486. Two - way repeaters. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Nov. 16, 1929, No. 35104. Convention date, Nov. 17, 1828. [Class 40 (iv).] An amplifier is rendered inoperative for voice frequencies by saturating it with a frequency outside the voice range. This frequency may result from a normal oscillation of the amplifier, which is prevented when voice Currents are to be passed. Fig. 1 shows the application to a two-way repeater with amplifiers V1, V2 controlled by echo-suppressors E2, E1. It is arranged that, by a defect of balance, the valves V1, V2 interact and sing at a frequency outside the range employed for voice transmission. Filters S1, S2 keep the singing frequency out of the lines L1, L2 and filters S3, S4 prevent it from affecting the echo-suppressors E1, E2. When speech arrives say from L1, V2 is disabled by E1 and the singing ceases.
GB3510429A 1928-11-17 1929-11-16 Process for influencing the transmission equivalent of discharge tubes, amplifiers or the like Expired GB343486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES88480D DE590314C (en) 1928-11-17 1928-11-17 Procedure for blocking discharge tubes and amplifiers

Publications (1)

Publication Number Publication Date
GB343486A true GB343486A (en) 1931-02-16

Family

ID=7514473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3510429A Expired GB343486A (en) 1928-11-17 1929-11-16 Process for influencing the transmission equivalent of discharge tubes, amplifiers or the like

Country Status (3)

Country Link
DE (1) DE590314C (en)
GB (1) GB343486A (en)
NL (1) NL32418C (en)

Also Published As

Publication number Publication date
NL32418C (en)
DE590314C (en) 1934-01-03

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