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1. (WO2018138491) LOUDSPEAKER PROTECTION SYSTEMS AND METHODS
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Pub. No.: WO/2018/138491 International Application No.: PCT/GB2018/050196
Publication Date: 02.08.2018 International Filing Date: 24.01.2018
IPC:
H04R 3/00 (2006.01) ,H04R 29/00 (2006.01)
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3
Circuits for transducers
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
29
Monitoring arrangements; Testing arrangements
Applicants: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LIMITED[GB/GB]; 7B Nightingale Way, Quartermile Edinburgh Central Scotland EH3 9EG, GB
Inventors: NAPOLI, Roberto; IT
WILLIAMS, Stefan; GB
Agent: O'CONNELL, David Christopher; GB
Priority Data:
62/450,32125.01.2017US
Title (EN) LOUDSPEAKER PROTECTION SYSTEMS AND METHODS
(FR) SYSTÈMES ET PROCÉDÉS DE PROTECTION DE HAUT-PARLEUR
Abstract:
(EN) A method of thermal protection of a voice coil of a loudspeaker comprises: determining an estimate of a temperature of the voice coil, determining an estimate of a rate of change of the temperature of the voice coil, and determining an estimate of power dissipation in the voice coil. A gain control signal is then generated for modulating a gain applied to an input signal in a signal path between an input terminal and said loudspeaker. The gain control signal is generated as a function of all of the estimate of the temperature of the voice coil, the estimate of the rate of change of the temperature of the voice coil, and the estimate of the power dissipation in the voice coil.
(FR) L'invention concerne un procédé de protection thermique d'une bobine mobile d'un haut-parleur consistant à : déterminer une estimation d'une température de la bobine mobile, déterminer une estimation d'un taux de variation de la température de la bobine mobile, et déterminer une estimation de la dissipation de puissance dans la bobine mobile. Un signal de commande de gain est ensuite généré pour moduler un gain appliqué à un signal d'entrée dans un trajet de signal entre une borne d'entrée et ledit haut-parleur. Le signal de commande de gain est généré en fonction de la totalité de l'estimation de la température de la bobine mobile, de l'estimation de la vitesse de variation de la température de la bobine mobile, et de l'estimation de la dissipation de puissance dans la bobine mobile.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)