CH526234A - Controllable attenuator - Google Patents

Controllable attenuator

Info

Publication number
CH526234A
CH526234A CH1719671A CH1719671A CH526234A CH 526234 A CH526234 A CH 526234A CH 1719671 A CH1719671 A CH 1719671A CH 1719671 A CH1719671 A CH 1719671A CH 526234 A CH526234 A CH 526234A
Authority
CH
Switzerland
Prior art keywords
controllable attenuator
attenuator
controllable
Prior art date
Application number
CH1719671A
Other languages
German (de)
Inventor
Gunnar Lindgren Owe
Original Assignee
Ericsson Telefon Ab L M
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
Priority claimed from SE16092/70A external-priority patent/SE337846B/xx
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of CH526234A publication Critical patent/CH526234A/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/24—Frequency-independent attenuators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Circuit For Audible Band Transducer (AREA)
CH1719671A 1970-11-27 1971-11-25 Controllable attenuator CH526234A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE16092/70A SE337846B (en) 1970-11-27 1970-11-27
FR7142363A FR2116072A5 (en) 1970-11-27 1971-11-26

Publications (1)

Publication Number Publication Date
CH526234A true CH526234A (en) 1972-07-31

Family

ID=26216737

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1719671A CH526234A (en) 1970-11-27 1971-11-25 Controllable attenuator

Country Status (5)

Country Link
CH (1) CH526234A (en)
DE (1) DE2157709A1 (en)
FR (1) FR2116072A5 (en)
GB (1) GB1350142A (en)
NL (1) NL7115909A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2638286C3 (en) * 1976-08-25 1979-03-01 Dasy Inter S.A., Genf (Schweiz) Circuit arrangement for a hands-free telephone
JPH08307181A (en) * 1995-05-09 1996-11-22 Sony Corp Level control circuit

Also Published As

Publication number Publication date
FR2116072A5 (en) 1972-07-07
GB1350142A (en) 1974-04-18
DE2157709A1 (en) 1972-06-08
NL7115909A (en) 1972-05-30

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Legal Events

Date Code Title Description
PL Patent ceased