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1. (WO2018220346) AUDIO AMPLIFIERS
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Pub. No.: WO/2018/220346 International Application No.: PCT/GB2018/051396
Publication Date: 06.12.2018 International Filing Date: 23.05.2018
IPC:
H03F 1/32 (2006.01) ,H03F 3/187 (2006.01) ,H04R 3/04 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
1
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32
Modifications of amplifiers to reduce non-linear distortion
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
3
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
181
Low-frequency amplifiers, e.g. audio preamplifiers
183
with semiconductor devices only
187
in integrated circuits
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
04
for correcting frequency response
Applicants:
CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LIMITED [GB/GB]; 7B Nightingale Way, Quartermile Edinburgh Lothian EH3 9EG, GB
Inventors:
LESSO, John Paul; GB
IDO, Toru; JP
Agent:
HOWELL, Matthew; GB
Priority Data:
1711160.011.07.2017GB
62/514,30602.06.2017US
Title (EN) AUDIO AMPLIFIERS
(FR) AMPLIFICATEURS AUDIO
Abstract:
(EN) An audio driving circuit (200) has an amplifier module (102) in a forward signal path between an input (103) for receiving an input audio signal (SIN) and an output for outputting an audio driving signal (VOUT). A pre-distortion module (202) is operable to apply a first transfer function to the signal in the forward signal path upstream of the amplifier module, wherein the first transfer function comprises a non-linear distortion function based on at least one distortion setting. An error block (203) is arranged to receive a first signal (SFF) derived from the input signal and a second signal (SFB) indicative of the voltage of the audio driving signal and determine a first error signal (£1) indicative of a difference between the first and second signals. The pre-distortion module (202) is operable to control the distortion setting(s) based on the first error signal.
(FR) Cette invention concerne un circuit de commande audio (200), comprenant un module amplificateur (102) dans un trajet de signal vers l'avant entre une entrée (103) pour recevoir un signal audio d'entrée (SIN) et une sortie pour délivrer en sortie un signal de commande audio (VOUT). Un module de pré-distorsion (202) est utilisable pour appliquer une première fonction de transfert au signal dans le trajet de signal vers l'avant en amont du module amplificateur, la première fonction de transfert comprenant une fonction de distorsion non linéaire basée sur au moins un réglage de distorsion. Un bloc d'erreur (203) est conçu pour recevoir un premier signal (SFF) dérivé du signal d'entrée et un second signal (SFB) indiquant la tension du signal de commande audio et déterminer un premier signal d'erreur (£1) indiquant une différence entre les premier et second signaux. Le module de pré-distorsion (202) est utilisable pour commander le(s) réglage(s) de distorsion sur la base du premier signal d'erreur.
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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)