IE52495B1 - Improvements in circuit arrangements for modifying dynamic range - Google Patents

Improvements in circuit arrangements for modifying dynamic range

Info

Publication number
IE52495B1
IE52495B1 IE2951/81A IE295181A IE52495B1 IE 52495 B1 IE52495 B1 IE 52495B1 IE 2951/81 A IE2951/81 A IE 2951/81A IE 295181 A IE295181 A IE 295181A IE 52495 B1 IE52495 B1 IE 52495B1
Authority
IE
Ireland
Prior art keywords
signal
circuit
band
frequency
signals
Prior art date
Application number
IE2951/81A
Other languages
English (en)
Other versions
IE812951L (en
Original Assignee
Dolby Ray Milton
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 Dolby Ray Milton filed Critical Dolby Ray Milton
Publication of IE812951L publication Critical patent/IE812951L/xx
Publication of IE52495B1 publication Critical patent/IE52495B1/en

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)
IE2951/81A 1981-12-01 1981-12-15 Improvements in circuit arrangements for modifying dynamic range IE52495B1 (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
IE812951L IE812951L (en) 1983-06-01
IE52495B1 true IE52495B1 (en) 1987-11-25

Family

ID=23268273

Family Applications (1)

Application Number Title Priority Date Filing Date
IE2951/81A IE52495B1 (en) 1981-12-01 1981-12-15 Improvements in circuit arrangements for modifying dynamic range

Country Status (15)

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

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 (en) * 1986-03-03 1998-01-14 Ray Milton Dolby Device for modifying the dynamic range of an input signal
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
US3795876A (en) * 1971-04-06 1974-03-05 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
SE449281B (sv) 1987-04-13
FR2517496A1 (fr) 1983-06-03
SE8107495L (sv) 1983-06-02
GB2111355B (en) 1985-02-13
ES8303848A1 (es) 1983-02-01
KR830008462A (ko) 1983-11-18
DE3151137A1 (de) 1983-07-14
CA1188996A (en) 1985-06-18
DE3151137C2 (sv) 1993-04-01
IE812951L (en) 1983-06-01
NL192860C (nl) 1998-03-04
GR77317B (sv) 1984-09-11
DK575681A (da) 1983-06-02
GB2111355A (en) 1983-06-29
IT1140402B (it) 1986-09-24
BE901906Q (fr) 1985-07-01
ES508394A0 (es) 1983-02-01
FR2517496B1 (fr) 1985-11-15
KR900000483B1 (ko) 1990-01-30
CH656996A5 (de) 1986-07-31
NL8105775A (nl) 1983-07-01
IT8125877A0 (it) 1981-12-29
NL192860B (nl) 1997-11-03
LU83854A1 (fr) 1982-05-07

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Legal Events

Date Code Title Description
MK9A Patent expired