ES8301084A1 - Circuit arrangement for modifying dynamic range - Google Patents

Circuit arrangement for modifying dynamic range

Info

Publication number
ES8301084A1
ES8301084A1 ES503497A ES503497A ES8301084A1 ES 8301084 A1 ES8301084 A1 ES 8301084A1 ES 503497 A ES503497 A ES 503497A ES 503497 A ES503497 A ES 503497A ES 8301084 A1 ES8301084 A1 ES 8301084A1
Authority
ES
Spain
Prior art keywords
gain
providing
level portion
compression
low level
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
ES503497A
Other languages
Spanish (es)
Other versions
ES503497A0 (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.)
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
Application filed by Individual filed Critical Individual
Publication of ES8301084A1 publication Critical patent/ES8301084A1/en
Publication of ES503497A0 publication Critical patent/ES503497A0/en
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • 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

  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

Compressor and expander circuits respectively are arranged in series, the circuits each having bilinear characteristics in which there is a low level portion of substantially constant gain up to a threshold, an intermediate level portion, above the threshold, of changing gain providing maximum compression ratio or expansion ratio, and a high level portion of substantially constant gain different from the gain of the low level portion. The high and low level portions thus each have a constant compression ratio of 1:1. Over the intermediate portion, the compression ratio 10 or 12 rises to a maximum 10b or 12b such as 2:1. The intermediate level changing gain portions of the characteristics are staggered between the series circuit to the extent that the resulting overall characteristic has a maximum compression or expansion ratio substantially no greater than that of any single circuit while providing an increased difference between the gains at low and high input levels (that is, providing increased compression or expansion) than for any of the circuits individually.
ES503497A 1980-06-30 1981-06-29 CIRCUIT PROVISION TO ALTER THE DYNAMIC MARGIN OF SIGNALS. Granted ES503497A0 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16395080A 1980-06-30 1980-06-30
US18077180A 1980-08-22 1980-08-22

Publications (2)

Publication Number Publication Date
ES8301084A1 true ES8301084A1 (en) 1982-11-01
ES503497A0 ES503497A0 (en) 1982-11-01

Family

ID=26860115

Family Applications (3)

Application Number Title Priority Date Filing Date
ES503493A Granted ES503493A0 (en) 1980-06-30 1981-06-29 A CIRCUIT PROVISION TO MODIFY THE DYNAMIC MARGIN OF AN ENTRY SIGNAL
ES503497A Granted ES503497A0 (en) 1980-06-30 1981-06-29 CIRCUIT PROVISION TO ALTER THE DYNAMIC MARGIN OF SIGNALS.
ES503496A Expired ES8204255A1 (en) 1980-06-30 1981-06-29 Circuit arrangement for modifying dynamic range

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES503493A Granted ES503493A0 (en) 1980-06-30 1981-06-29 A CIRCUIT PROVISION TO MODIFY THE DYNAMIC MARGIN OF AN ENTRY SIGNAL

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES503496A Expired ES8204255A1 (en) 1980-06-30 1981-06-29 Circuit arrangement for modifying dynamic range

Country Status (17)

Country Link
KR (4) KR880000106B1 (en)
AT (3) AT386911B (en)
AU (3) AU546641B2 (en)
BR (3) BR8104158A (en)
CH (3) CH654703A5 (en)
DE (3) DE3125790A1 (en)
DK (3) DK168806B1 (en)
ES (3) ES503493A0 (en)
FI (3) FI79428C (en)
GB (3) GB2079113B (en)
HK (3) HK28385A (en)
IT (3) IT1137985B (en)
MY (3) MY8501149A (en)
NL (3) NL190214C (en)
NO (3) NO157398C (en)
SE (3) SE447524B (en)
SG (3) SG4285G (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736433A (en) * 1985-06-17 1988-04-05 Dolby Ray Milton Circuit arrangements for modifying dynamic range using action substitution and superposition techniques
US4815068A (en) * 1987-08-07 1989-03-21 Dolby Ray Milton Audio encoder for use with more than one decoder each having different characteristics
US5651028A (en) * 1995-05-09 1997-07-22 Unisys Corporation Data transmission system with a low peak-to-average power ratio based on distorting frequently occuring signals
US5793797A (en) * 1995-05-09 1998-08-11 Unisys Corporation Data transmisson system with a low peak-to-average power ratio based on distorting small amplitude signals
DE10011193B4 (en) * 2000-03-08 2004-02-05 Sennheiser Electronic Gmbh & Co. Kg Compander system with a compressor circuit and an expander circuit

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US28426A (en) * 1860-05-22 Shortening tires
US2558002A (en) * 1939-10-24 1951-06-26 Int Standard Electric Corp Volume compression system
US3022473A (en) * 1959-08-18 1962-02-20 Bell Telephone Labor Inc Signal recovery circuits
GB1253031A (en) * 1968-01-10 1971-11-10
US3903485A (en) * 1968-01-10 1975-09-02 Ray Milton Dolby Compressors, expanders and noise reduction systems
US3846719A (en) * 1973-09-13 1974-11-05 Dolby Laboratories Inc Noise reduction systems
USRE28426E (en) * 1968-11-01 1975-05-20 Signal compressors and expanders
US3757254A (en) * 1970-06-05 1973-09-04 Victor Co Ltd N system noise reduction system and apparatus using a compression and expansio
GB1390341A (en) * 1971-03-12 1975-04-09 Dolby Laboratories Inc Signal compressors and expanders
GB1367002A (en) * 1971-04-06 1974-09-18 Victor Company Of Japan Compression and/or expansion system and circuit
US3875537A (en) * 1972-05-02 1975-04-01 Dolby Laboratories Inc Circuits for modifying the dynamic range of an input signal
GB1432763A (en) * 1972-05-02 1976-04-22 Dolby Laboratories Inc Compressors expanders and noise reduction systems
US3934190A (en) * 1972-09-15 1976-01-20 Dolby Laboratories, Inc. Signal compressors and expanders
US3909733A (en) * 1973-05-17 1975-09-30 Dolby Laboratories Inc Dynamic range modifying circuits utilizing variable negative resistance
US3971405A (en) * 1974-07-15 1976-07-27 Parker-Hannifin Corporation Pressure controlled hydrant valve coupler
US3930208A (en) * 1974-08-29 1975-12-30 Northern Electric Co A-C signal processing circuits for compandors
US3902131A (en) * 1974-09-06 1975-08-26 Quadracast Systems Tandem audio dynamic range expander
JPS51127608A (en) * 1975-04-30 1976-11-06 Victor Co Of Japan Ltd Signal transmitting unit
US4061874A (en) * 1976-06-03 1977-12-06 Fricke J P System for reproducing sound information
DE2803751C2 (en) * 1978-01-28 1982-06-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit for automatic dynamic compression or expansion
JPS5552971A (en) * 1978-10-16 1980-04-17 Mitsubishi Electric Corp Simulator for radar indicator

Also Published As

Publication number Publication date
MY8501149A (en) 1985-12-31
DE3125790A1 (en) 1982-05-13
NO812216L (en) 1982-01-04
ES503496A0 (en) 1982-04-16
CH654703A5 (en) 1986-02-28
AU7239381A (en) 1982-01-07
DE3125788A1 (en) 1982-05-13
AT386911B (en) 1988-11-10
NL8103124A (en) 1982-01-18
IT8122650A0 (en) 1981-06-30
FI79428C (en) 1989-12-11
AU545125B2 (en) 1985-07-04
GB2079114A (en) 1982-01-13
NO157398B (en) 1987-11-30
BR8104156A (en) 1982-03-16
DE3125790C2 (en) 1992-11-12
GB2079113A (en) 1982-01-13
DE3125788C2 (en) 1992-06-11
DK282581A (en) 1981-12-31
SE450985B (en) 1987-09-07
HK28285A (en) 1985-04-12
FI74368C (en) 1988-01-11
FI812026L (en) 1981-12-31
GB2079112A (en) 1982-01-13
SG4285G (en) 1985-06-14
NL190214B (en) 1993-07-01
ATA291681A (en) 1988-03-15
DK282881A (en) 1981-12-31
NO812217L (en) 1982-01-04
KR830006992A (en) 1983-10-12
FI79428B (en) 1989-08-31
GB2079113B (en) 1984-10-03
NL8103123A (en) 1982-01-18
NO812218L (en) 1982-01-04
DK168806B1 (en) 1994-06-13
GB2079114B (en) 1984-10-03
SE8104063L (en) 1981-12-31
IT1137985B (en) 1986-09-10
SE8104061L (en) 1981-12-31
KR840002492B1 (en) 1984-12-31
ES8204255A1 (en) 1982-04-16
IT1137986B (en) 1986-09-10
NO157398C (en) 1988-03-09
DK172325B1 (en) 1998-03-16
ATA291481A (en) 1987-12-15
NL189988C (en) 1993-09-16
NL192652B (en) 1997-07-01
DK156356B (en) 1989-08-07
CH660653A5 (en) 1987-05-15
KR840002491B1 (en) 1984-12-31
NO157400B (en) 1987-11-30
HK28485A (en) 1985-04-12
FI74368B (en) 1987-09-30
IT8122651A0 (en) 1981-06-30
AU544888B2 (en) 1985-06-20
ES503497A0 (en) 1982-11-01
AU7236581A (en) 1982-01-07
BR8104158A (en) 1982-03-16
SE447524B (en) 1986-11-17
SE8104062L (en) 1981-12-31
NL8103122A (en) 1982-01-18
NL190214C (en) 1993-12-01
IT1137987B (en) 1986-09-10
ATA291581A (en) 1983-03-15
AT386304B (en) 1988-08-10
ES8300233A1 (en) 1982-10-01
MY8501147A (en) 1985-12-31
FI76456B (en) 1988-06-30
AT372796B (en) 1983-11-10
SE447525B (en) 1986-11-17
FI812024L (en) 1981-12-31
CH662684A5 (en) 1987-10-15
NL189988B (en) 1993-04-16
ES503493A0 (en) 1982-10-01
HK28385A (en) 1985-04-12
AU7239481A (en) 1982-01-07
SG4385G (en) 1985-06-14
DK156356C (en) 1989-12-27
DE3125789C2 (en) 1984-01-12
KR830006993A (en) 1983-10-12
BR8104157A (en) 1982-03-16
NO157399C (en) 1988-03-09
NO157399B (en) 1987-11-30
MY8501148A (en) 1985-12-31
AU546641B2 (en) 1985-09-12
DE3125789A1 (en) 1982-05-19
FI76456C (en) 1988-10-10
DK282981A (en) 1981-12-31
SG4585G (en) 1985-06-14
FI812025L (en) 1981-12-31
KR880000106B1 (en) 1988-02-23
IT8122652A0 (en) 1981-06-30
NO157400C (en) 1988-03-09
KR880000105B1 (en) 1988-02-23
NL192652C (en) 1997-11-04
GB2079112B (en) 1984-10-03

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