IT1140402B - CIRCUIT PROVISION TO MODIFY THE DYNAMIC RANGE OF AUDIO AND OTHER SIGNALS - Google Patents

CIRCUIT PROVISION TO MODIFY THE DYNAMIC RANGE OF AUDIO AND OTHER SIGNALS

Info

Publication number
IT1140402B
IT1140402B IT25877/81A IT2587781A IT1140402B IT 1140402 B IT1140402 B IT 1140402B IT 25877/81 A IT25877/81 A IT 25877/81A IT 2587781 A IT2587781 A IT 2587781A IT 1140402 B IT1140402 B IT 1140402B
Authority
IT
Italy
Prior art keywords
modify
audio
signals
dynamic range
circuit provision
Prior art date
Application number
IT25877/81A
Other languages
Italian (it)
Other versions
IT8125877A0 (en
Inventor
Ray Milton Dolby
Original Assignee
Ray Milton Dolby
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 US06/325,530 external-priority patent/US4498055A/en
Application filed by Ray Milton Dolby filed Critical Ray Milton Dolby
Publication of IT8125877A0 publication Critical patent/IT8125877A0/en
Application granted granted Critical
Publication of IT1140402B publication Critical patent/IT1140402B/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H03G7/08—Volume compression or expansion in amplifiers having semiconductor devices incorporating negative feedback
    • 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
    • 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
IT25877/81A 1981-12-01 1981-12-29 CIRCUIT PROVISION TO MODIFY THE DYNAMIC RANGE OF AUDIO AND OTHER SIGNALS IT1140402B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/325,530 US4498055A (en) 1981-09-10 1981-12-01 Circuit arrangements for modifying dynamic range

Publications (2)

Publication Number Publication Date
IT8125877A0 IT8125877A0 (en) 1981-12-29
IT1140402B true IT1140402B (en) 1986-09-24

Family

ID=23268273

Family Applications (1)

Application Number Title Priority Date Filing Date
IT25877/81A IT1140402B (en) 1981-12-01 1981-12-29 CIRCUIT PROVISION TO MODIFY THE DYNAMIC RANGE OF AUDIO AND OTHER SIGNALS

Country Status (15)

Country Link
KR (1) KR900000483B1 (en)
BE (1) BE901906Q (en)
CA (1) CA1188996A (en)
CH (1) CH656996A5 (en)
DE (1) DE3151137A1 (en)
DK (1) DK575681A (en)
ES (1) ES8303848A1 (en)
FR (1) FR2517496B1 (en)
GB (1) GB2111355B (en)
GR (1) GR77317B (en)
IE (1) IE52495B1 (en)
IT (1) IT1140402B (en)
LU (1) LU83854A1 (en)
NL (1) NL192860C (en)
SE (1) SE449281B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4922535A (en) * 1986-03-03 1990-05-01 Dolby Ray Milton Transient control aspects of circuit arrangements for altering the dynamic range of audio signals
JP2764205B2 (en) * 1986-03-03 1998-06-11 レ−・ミルトン・ドルビ Bootstrap signal attenuation circuit
CA1269138A (en) * 1986-03-03 1990-05-15 Ray Milton Dolby Attenuator circuit employing bootstrapping
GB2429779A (en) * 2005-09-01 2007-03-07 Geo Kingsbury Machine Tools Lt Testing components of drive trains

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1120541A (en) * 1965-08-11 1968-07-17 Dolby Ray Milton Improvements in noise reduction systems
US3665345A (en) * 1969-07-21 1972-05-23 Dolby Laboratories Inc Compressors and expanders for noise reduction systems
GB1367002A (en) * 1971-04-06 1974-09-18 Victor Company Of Japan Compression and/or expansion system and circuit
US4101849A (en) * 1976-11-08 1978-07-18 Dbx, Inc. Adaptive filter
BE889426A (en) * 1980-06-30 1981-10-16 Dolby Ray Milton CIRCUIT FOR REDUCING THE EFFECTS OF OVERLOADING OF A SIGNAL RECORDING OR TRANSMISSION MEDIUM

Also Published As

Publication number Publication date
DE3151137C2 (en) 1993-04-01
IE52495B1 (en) 1987-11-25
NL192860C (en) 1998-03-04
NL8105775A (en) 1983-07-01
FR2517496B1 (en) 1985-11-15
LU83854A1 (en) 1982-05-07
CA1188996A (en) 1985-06-18
FR2517496A1 (en) 1983-06-03
KR830008462A (en) 1983-11-18
SE449281B (en) 1987-04-13
ES508394A0 (en) 1983-02-01
IE812951L (en) 1983-06-01
ES8303848A1 (en) 1983-02-01
SE8107495L (en) 1983-06-02
CH656996A5 (en) 1986-07-31
DK575681A (en) 1983-06-02
GB2111355A (en) 1983-06-29
GB2111355B (en) 1985-02-13
NL192860B (en) 1997-11-03
GR77317B (en) 1984-09-11
IT8125877A0 (en) 1981-12-29
BE901906Q (en) 1985-07-01
KR900000483B1 (en) 1990-01-30
DE3151137A1 (en) 1983-07-14

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19961227