CA1188996A - Circuit arrangements for modifying dynamic range - Google Patents

Circuit arrangements for modifying dynamic range

Info

Publication number
CA1188996A
CA1188996A CA000392068A CA392068A CA1188996A CA 1188996 A CA1188996 A CA 1188996A CA 000392068 A CA000392068 A CA 000392068A CA 392068 A CA392068 A CA 392068A CA 1188996 A CA1188996 A CA 1188996A
Authority
CA
Canada
Prior art keywords
signal
circuit
path
band
input
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
CA000392068A
Other languages
English (en)
French (fr)
Inventor
Ray M. Dolby
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1188996A publication Critical patent/CA1188996A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H03G9/025—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

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
CA000392068A 1981-12-01 1981-12-11 Circuit arrangements for modifying dynamic range Expired CA1188996A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US325,530 1981-12-01
US06/325,530 US4498055A (en) 1981-09-10 1981-12-01 Circuit arrangements for modifying dynamic range

Publications (1)

Publication Number Publication Date
CA1188996A true CA1188996A (en) 1985-06-18

Family

ID=23268273

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000392068A Expired CA1188996A (en) 1981-12-01 1981-12-11 Circuit arrangements for modifying dynamic range

Country Status (15)

Country Link
KR (1) KR900000483B1 (de)
BE (1) BE901906Q (de)
CA (1) CA1188996A (de)
CH (1) CH656996A5 (de)
DE (1) DE3151137A1 (de)
DK (1) DK575681A (de)
ES (1) ES508394A0 (de)
FR (1) FR2517496B1 (de)
GB (1) GB2111355B (de)
GR (1) GR77317B (de)
IE (1) IE52495B1 (de)
IT (1) IT1140402B (de)
LU (1) LU83854A1 (de)
NL (1) NL192860C (de)
SE (1) SE449281B (de)

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
CA1269138A (en) * 1986-03-03 1990-05-15 Ray Milton Dolby Attenuator circuit employing bootstrapping
EP0421559B1 (de) * 1986-03-03 1998-01-14 Ray Milton Dolby Schaltungsanordnung zum Abändern des Dynamikbereiches eines Signals
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
BE753495A (fr) * 1969-07-21 1970-12-16 Dolby Laboratories Inc Filtres limiteurs perfectionnes pour systemes attenuateurs de bruit. (
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 (fr) * 1980-06-30 1981-10-16 Dolby Ray Milton Circuit de reduction des effets de la surcharge d'un support d'enregistrement ou de transmission de signaux

Also Published As

Publication number Publication date
IT1140402B (it) 1986-09-24
ES8303848A1 (es) 1983-02-01
GB2111355A (en) 1983-06-29
SE8107495L (sv) 1983-06-02
KR900000483B1 (ko) 1990-01-30
IT8125877A0 (it) 1981-12-29
ES508394A0 (es) 1983-02-01
DE3151137C2 (de) 1993-04-01
BE901906Q (fr) 1985-07-01
IE52495B1 (en) 1987-11-25
DE3151137A1 (de) 1983-07-14
FR2517496A1 (fr) 1983-06-03
NL192860B (nl) 1997-11-03
GB2111355B (en) 1985-02-13
SE449281B (sv) 1987-04-13
FR2517496B1 (fr) 1985-11-15
IE812951L (en) 1983-06-01
NL8105775A (nl) 1983-07-01
LU83854A1 (fr) 1982-05-07
CH656996A5 (de) 1986-07-31
DK575681A (da) 1983-06-02
KR830008462A (ko) 1983-11-18
GR77317B (de) 1984-09-11
NL192860C (nl) 1998-03-04

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Legal Events

Date Code Title Description
MKEX Expiry