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Machine translation
1. (WO2008100055) MICROPHONE AMPLIFIER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2008/100055    International Application No.:    PCT/KR2008/000817
Publication Date: 21.08.2008 International Filing Date: 12.02.2008
IPC:
H04R 3/00 (2006.01)
Applicants: RFSEMI TECHNOLOGIES, INC. [KR/KR]; 803, TIC Center, 220 Gung-dong Yuseong-gu, Daejeon 305-764 (KR) (For All Designated States Except US).
LEE, Jin Hyo [KR/KR]; (KR) (For US Only).
LEE, Kyu Hong [KR/KR]; (KR) (For US Only).
SHIN, Hee Cheon [KR/KR]; (KR) (For US Only).
YOUN, Hun Ill [KR/KR]; (KR) (For US Only)
Inventors: LEE, Jin Hyo; (KR).
LEE, Kyu Hong; (KR).
SHIN, Hee Cheon; (KR).
YOUN, Hun Ill; (KR)
Agent: JUNG, Hwoi Hwan; Suite 713, Cheongsa Offistel, 915 Dunsan-dong Seo-gu, Daejeon 302-120 (KR)
Priority Data:
10-2007-0016271 16.02.2007 KR
Title (EN) MICROPHONE AMPLIFIER
(FR) AMPLIFICATEUR POUR MICROPHONE
Abstract: front page image
(EN)The present invention relates to a microphone amplifier, including a bias unit for providing an input signal reference potential between a signal input terminal and a ground terminal, a voltage-to-current conversion unit for amplifying the input signal, a constant current source for supplying constant current to the voltage-to-current conversion unit, and a current amplification unit for amplifying variation in current between the constant current source and the voltage-to-current conversion unit. The above-described present invention provides a highly trustworthy microphone amplifier, in which a low-noise characteristic junction field effect transistor and a low- noise characteristic bipolar transistor are combined together, thereby realizing high input impedance, high amplification gain and low current consumption.
(FR)L'invention porte sur un amplificateur pour microphone, comportant: une unité de polarisation fournissant un potentiel de référence de signal d'entrée entre une borne d'entrée et une borne de terre; une unité de conversion tension/courant amplifiant le signal d'entrée; une source de courant constant alimentant l'unité de conversion tension/courant; et une unité d'amplification amplifiant les variations de courant entre la source de courant constant et l'unité de conversion tension/courant. Ledit amplificateur est très fiable puisqu'il combine un transistor à effet de champ à jonction et un transistor bipolaire à faible bruit, d'où sa forte impédance d'entrée, son gain d'amplification élevé, et sa faible consommation de courant.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: Korean (KO)