ES406937A1 - Electric circuit arrangements - Google Patents

Electric circuit arrangements

Info

Publication number
ES406937A1
ES406937A1 ES406937A ES406937A ES406937A1 ES 406937 A1 ES406937 A1 ES 406937A1 ES 406937 A ES406937 A ES 406937A ES 406937 A ES406937 A ES 406937A ES 406937 A1 ES406937 A1 ES 406937A1
Authority
ES
Spain
Prior art keywords
circuit
signal
branches
terminal
transistors
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
ES406937A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES406937A1 publication Critical patent/ES406937A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0278—Arrangements for impedance matching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/141—Control of transmission; Equalising characterised by the equalising network used using multiequalisers, e.g. bump, cosine, Bode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03878—Line equalisers; line build-out devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/10—Compensating for variations in line balance

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Networks Using Active Elements (AREA)
  • Filters And Equalizers (AREA)
  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

A gain control circuit comprising two branches connected in parallel, each of which includes a transistor and a frequency dependent impedance; An input circuit that includes a shoring terminal, and arranged to feed the input signal in common to both branches; an output terminal arranged to receive an output signal from an electrode of one of the transistors; and a signal control terminal. The circuit is such that, the variation of a control signal applied to the signal control terminal will change the resistance ratio, in the branches of the circuit, of the two transistors, thus changing the frequency response characteristic of the circuit. (Machine-translation by Google Translate, not legally binding)
ES406937A 1971-09-23 1972-09-22 Electric circuit arrangements Expired ES406937A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4439271 1971-09-23

Publications (1)

Publication Number Publication Date
ES406937A1 true ES406937A1 (en) 1975-09-01

Family

ID=10433076

Family Applications (1)

Application Number Title Priority Date Filing Date
ES406937A Expired ES406937A1 (en) 1971-09-23 1972-09-22 Electric circuit arrangements

Country Status (9)

Country Link
AU (1) AU464019B2 (en)
BE (1) BE789113A (en)
CH (1) CH551108A (en)
DE (1) DE2245676A1 (en)
ES (1) ES406937A1 (en)
FR (1) FR2154164A5 (en)
GB (1) GB1308877A (en)
IE (1) IE36569B1 (en)
ZA (1) ZA724857B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2262089C3 (en) * 1972-12-19 1975-10-30 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for electronic frequency influencing, in particular electronic sound adjuster
JPS52104840A (en) * 1976-03-01 1977-09-02 Hitachi Ltd Variable equalizer

Also Published As

Publication number Publication date
CH551108A (en) 1974-06-28
BE789113A (en) 1973-03-22
AU4603972A (en) 1974-03-07
IE36569B1 (en) 1976-12-08
AU464019B2 (en) 1975-08-14
FR2154164A5 (en) 1973-05-04
GB1308877A (en) 1973-03-07
ZA724857B (en) 1973-04-25
DE2245676A1 (en) 1973-03-29
IE36569L (en) 1973-03-23

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