GB1514242A - A-c signal processing circuits for compandors - Google Patents

A-c signal processing circuits for compandors

Info

Publication number
GB1514242A
GB1514242A GB3374975A GB3374975A GB1514242A GB 1514242 A GB1514242 A GB 1514242A GB 3374975 A GB3374975 A GB 3374975A GB 3374975 A GB3374975 A GB 3374975A GB 1514242 A GB1514242 A GB 1514242A
Authority
GB
United Kingdom
Prior art keywords
circuit
control
diodes
pass filter
amplifiers
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
GB3374975A
Other languages
English (en)
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to DE19762637527 priority Critical patent/DE2637527A1/de
Publication of GB1514242A publication Critical patent/GB1514242A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements
    • 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
    • H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Networks Using Active Elements (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
GB3374975A 1974-08-27 1975-08-13 A-c signal processing circuits for compandors Expired GB1514242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19762637527 DE2637527A1 (de) 1975-08-13 1976-08-20 Polymerisationskatalisator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA207,850A CA998617A (en) 1974-08-27 1974-08-27 A-c signal processing circuits for compandors

Publications (1)

Publication Number Publication Date
GB1514242A true GB1514242A (en) 1978-06-14

Family

ID=4100982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3374975A Expired GB1514242A (en) 1974-08-27 1975-08-13 A-c signal processing circuits for compandors

Country Status (7)

Country Link
JP (1) JPS5147312A (nl)
CA (1) CA998617A (nl)
DE (1) DE2537998A1 (nl)
FR (1) FR2283586A1 (nl)
GB (1) GB1514242A (nl)
NL (1) NL7509585A (nl)
SE (1) SE7509493L (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1837893A1 (de) 2006-03-25 2007-09-26 HÜTTINGER Elektronik GmbH + Co. KG Messeeinrichtung eines HF-Plasmasystems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485838B1 (fr) * 1980-06-30 1986-02-21 Dolby Ray Dispositif destine a modifier la plage dynamique de signaux d'entree
JPS58108857A (ja) * 1981-12-23 1983-06-29 Fujitsu Ltd 過電流保護回路

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1085919B (de) * 1959-04-23 1960-07-28 Philips Nv Wiedergabevorrichtung mit selbsttaetiger Verstaerkungsregelung
US3119077A (en) * 1960-12-09 1964-01-21 Bell Telephone Labor Inc Automatic gain control circuit using variable attenuators in the signal path
JPS5640403B1 (nl) * 1971-02-10 1981-09-21

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1837893A1 (de) 2006-03-25 2007-09-26 HÜTTINGER Elektronik GmbH + Co. KG Messeeinrichtung eines HF-Plasmasystems

Also Published As

Publication number Publication date
JPS5147312A (en) 1976-04-22
DE2537998A1 (de) 1976-03-11
FR2283586A1 (fr) 1976-03-26
CA998617A (en) 1976-10-19
NL7509585A (nl) 1976-03-02
SE7509493L (sv) 1976-03-01

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Legal Events

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