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1. (WO2019008628) AMPLIFYING DEVICE
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Pub. No.: WO/2019/008628 International Application No.: PCT/JP2017/024342
Publication Date: 10.01.2019 International Filing Date: 03.07.2017
IPC:
H03F 3/217 (2006.01) ,H03F 3/38 (2006.01) ,H03F 3/68 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
3
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
20
Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
21
with semiconductor devices only
217
Class D power amplifiers; Switching amplifiers
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
3
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
38
Dc amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
3
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
68
Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
Applicants:
ヤマハ株式会社 YAMAHA CORPORATION [JP/JP]; 静岡県浜松市中区中沢町10番1号 10-1, Nakazawa-cho, Naka-ku, Hamamatsu-shi, Shizuoka 4308650, JP
Inventors:
外川 武史 TOGAWA, Takeshi; JP
Agent:
大林 章 OHBAYASHI, Akira; JP
高田 聖一 TAKADA, Seiichi; JP
高橋 太朗 TAKAHASHI, Taro; JP
Priority Data:
Title (EN) AMPLIFYING DEVICE
(FR) DISPOSITIF D'AMPLIFICATION
(JA) 増幅装置
Abstract:
(EN) This amplifying device is provided with: a self-excited class-D amplifier circuit including a modulation circuit in which pulse modulation by self-excited oscillation is performed on an acoustic signal, wherein a synchronous signal synchronized with the self-excited oscillation is supplied to the modulation circuit; and a band-stop filter for attenuating a component of a frequency band including the frequency of the synchronous signal among output signals from the class-D amplifier circuit.
(FR) La présente invention concerne un dispositif d'amplification qui est pourvu : d'un circuit amplificateur de classe D auto-excité comprenant un circuit de modulation dans lequel une modulation d'impulsion par oscillation auto-excitée est effectuée sur un signal acoustique, un signal synchrone synchronisé avec l'oscillation auto-excitée étant fourni au circuit de modulation ; et d'un filtre coupe-bande pour atténuer une composante d'une bande de fréquence comprenant la fréquence du signal synchrone parmi des signaux de sortie provenant du circuit amplificateur de classe D.
(JA) 増幅装置は、自励発振によるパルス変調を音響信号に対して実行する変調回路を含み、前記自励発振が同期する同期信号が前記変調回路に供給される自励式のD級増幅回路と、前記D級増幅回路からの出力信号のうち前記同期信号の周波数を含む周波数帯域の成分を減衰させる帯域阻止フィルタとを具備する。
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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: Japanese (JA)
Filing Language: Japanese (JA)