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FR3061396B1 - MULTI-BAND LIMITING DEVICE AND AMPLIFIER COMPRISING SAME - Google Patents

MULTI-BAND LIMITING DEVICE AND AMPLIFIER COMPRISING SAME Download PDF

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Publication number
FR3061396B1
FR3061396B1 FR1663210A FR1663210A FR3061396B1 FR 3061396 B1 FR3061396 B1 FR 3061396B1 FR 1663210 A FR1663210 A FR 1663210A FR 1663210 A FR1663210 A FR 1663210A FR 3061396 B1 FR3061396 B1 FR 3061396B1
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France
Prior art keywords
extraction filter
frequency
response
limit value
limiter
Prior art date
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Active
Application number
FR1663210A
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French (fr)
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FR3061396A1 (en
Inventor
Pierre-Yves Diquelou
David Kerneis
Bernard Debail
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Cabasse SA
Original Assignee
Cabasse SA
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Filing date
Publication date
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Priority to FR1663210A priority Critical patent/FR3061396B1/en
Publication of FR3061396A1 publication Critical patent/FR3061396A1/en
Application granted granted Critical
Publication of FR3061396B1 publication Critical patent/FR3061396B1/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/007—Protection circuits for transducers
    • 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

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Amplifiers (AREA)

Abstract

Le dispositif limiteur multi-bandes (60), comporte : - au moins deux filtres (42, 44, 46) d'extraction de bande de fréquences, dont chaque courbe de réponse présente un coude, les courbes de réponse se croisant sensiblement à -6 dB, - au moins un filtre (43, 45) d'extraction de pic de fréquence, dont la valeur maximale de la courbe de réponse se situe au dessus du croisement des courbes de réponse de deux filtres d'extraction de bande de fréquences et - pour chaque filtre d'extraction de bande de fréquences : - un sommateur (47, 48, 49) configurer pour additionner le signal sortant dudit filtre d'extraction de bande de fréquences et d'au moins un filtre d'extraction de pic de fréquence, - un limiteur (53, 54, 55) à réponse non linéaire, dont la courbe de réponse présente une pente, au-delà d'une valeur limite prédéterminée, inférieure à la pente moyenne en-deçà de cette valeur limite, configuré pour recevoir le signal sortant dudit filtre d'extraction de bande et - un détecteur (50, 51, 52) configuré pour déclencher le limiteur lorsque la valeur efficace du signal sortant du sommateur est supérieure à une valeur limite de détection.The multi-band limiter device (60) comprises: - at least two filters (42, 44, 46) for extracting frequency bands, each response curve of which has an elbow, the response curves intersecting substantially at - 6 dB, - at least one frequency peak extraction filter (43, 45), the maximum value of the response curve of which lies above the crossing of the response curves of two frequency band extraction filters and - for each frequency band extraction filter: - an adder (47, 48, 49) configured to add the signal leaving said frequency band extraction filter and at least one peak extraction filter frequency, - a limiter (53, 54, 55) with non-linear response, the response curve of which has a slope, beyond a predetermined limit value, less than the average slope below this limit value, configured to receive the signal output from said band extraction filter and - a detector (50, 51, 52) configured to trigger the limiter when the effective value of the signal leaving the adder is greater than a detection limit value.

FR1663210A 2016-12-22 2016-12-22 MULTI-BAND LIMITING DEVICE AND AMPLIFIER COMPRISING SAME Active FR3061396B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1663210A FR3061396B1 (en) 2016-12-22 2016-12-22 MULTI-BAND LIMITING DEVICE AND AMPLIFIER COMPRISING SAME

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1663210 2016-12-22
FR1663210A FR3061396B1 (en) 2016-12-22 2016-12-22 MULTI-BAND LIMITING DEVICE AND AMPLIFIER COMPRISING SAME

Publications (2)

Publication Number Publication Date
FR3061396A1 FR3061396A1 (en) 2018-06-29
FR3061396B1 true FR3061396B1 (en) 2020-02-21

Family

ID=58609540

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1663210A Active FR3061396B1 (en) 2016-12-22 2016-12-22 MULTI-BAND LIMITING DEVICE AND AMPLIFIER COMPRISING SAME

Country Status (1)

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FR (1) FR3061396B1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8903109B2 (en) * 2010-06-23 2014-12-02 Stmicroelectronics, Inc. Frequency domain multiband dynamics compressor with automatically adjusting frequency band boundary locations
JP6336830B2 (en) * 2014-06-23 2018-06-06 ローム株式会社 Level adjustment circuit, digital sound processor, audio amplifier integrated circuit, electronic equipment, audio signal automatic level adjustment method
WO2016155853A1 (en) * 2015-04-02 2016-10-06 Harman Becker Automotive Systems Gmbh Multii-band signal compressing

Also Published As

Publication number Publication date
FR3061396A1 (en) 2018-06-29

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