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GB1230028A - - Google Patents

Info

Publication number
GB1230028A
GB1230028A GB1230028DA GB1230028A GB 1230028 A GB1230028 A GB 1230028A GB 1230028D A GB1230028D A GB 1230028DA GB 1230028 A GB1230028 A GB 1230028A
Authority
GB
United Kingdom
Prior art keywords
network
amplifier
frequency
distributed
aug
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
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 GB1230028A publication Critical patent/GB1230028A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal
    • H04B3/08—Control of transmission; Equalising by the transmitted signal in negative-feedback path of line amplifier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • H01C17/065—Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
    • H01C17/06506—Precursor compositions therefor, e.g. pastes, inks, glass frits
    • H01C17/06513—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
    • H01C17/06533—Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component composed of oxides
    • H01C17/06546—Oxides of zinc or cadmium
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1204—Distributed RC filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Filters And Equalizers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

1,230,028. Amplifiers. SIEMENS A.G. 4 Aug., 1969 [5 Aug., 1968], No. 38907/69. Heading H3T. An amplifier 7 for compensating line loss is provided with frequency dependent negative feedback over-a network 5 comprising distributed series resistance and distributed shunt capacitance, that end of the network connected to the input of the amplifier being terminated by a frequency-dependent reactance which simulates the surge impedance of the network. In the embodiment the frequency-dependent reactance comprises a further network 10 comprising distributed series resistance and distributed shunt capacitance, terminated by a resistor 11. The amplifier 7 is provided with input and output junctions 6, 8 respectively. The effective length of the network 5 may be made adjustable, to compensate for different line losses, and this network may be shunted by a capacitor (not shown) which is operative outside the transmission band. The network 5 may employ a material having substantially the same thermal drift characteristic of attenuation as a given cable. The arrangement may be constructed as an integrated circuit.
GB1230028D 1968-08-05 1969-08-04 Expired GB1230028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681762692 DE1762692B2 (en) 1968-08-05 1968-08-05 LINE AMPLIFIER TO REMOVE FREQUENCY-DEPENDENT ATTENUATION OF MESSAGE TRANSMISSION LINES

Publications (1)

Publication Number Publication Date
GB1230028A true GB1230028A (en) 1971-04-28

Family

ID=5697148

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1230028D Expired GB1230028A (en) 1968-08-05 1969-08-04

Country Status (6)

Country Link
JP (1) JPS4925784B1 (en)
CH (1) CH495091A (en)
DE (1) DE1762692B2 (en)
GB (1) GB1230028A (en)
NL (1) NL152142B (en)
SE (1) SE343183B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2713871C1 (en) * 2018-11-30 2020-02-07 Акционерное общество "Проектно-конструкторское бюро "РИО" Low-frequency amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2713871C1 (en) * 2018-11-30 2020-02-07 Акционерное общество "Проектно-конструкторское бюро "РИО" Low-frequency amplifier

Also Published As

Publication number Publication date
DE1762692A1 (en) 1970-07-02
NL152142B (en) 1977-01-17
NL6911318A (en) 1970-02-09
CH495091A (en) 1970-08-15
SE343183B (en) 1972-02-28
JPS4925784B1 (en) 1974-07-03
DE1762692B2 (en) 1971-04-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee