WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2012117757) BIAS CONTROL CIRCUIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/117757    International Application No.:    PCT/JP2012/050762
Publication Date: 07.09.2012 International Filing Date: 17.01.2012
IPC:
H03F 3/19 (2006.01), H03F 1/02 (2006.01), H03F 1/06 (2006.01), H03F 3/24 (2006.01)
Applicants: TDK Corporation [JP/JP]; 3-9-1, Shibaura, Minato-ku, Tokyo 1080023 (JP) (For All Designated States Except US).
SHIBUYA TOMOHIKO [JP/JP]; (JP) (For US Only).
AJIOKA ATSUSHI [JP/JP]; (JP) (For US Only).
TSUMITA ATSUSHI [JP/JP]; (JP) (For US Only)
Inventors: SHIBUYA TOMOHIKO; (JP).
AJIOKA ATSUSHI; (JP).
TSUMITA ATSUSHI; (JP)
Priority Data:
2011-046919 03.03.2011 JP
Title (EN) BIAS CONTROL CIRCUIT
(FR) CIRCUIT DE COMMANDE DE POLARISATION
(JA) バイアス制御回路
Abstract: front page image
(EN)[Problem] To suppress drop in gain with respect to a low-level high-frequency signal while mitigating distortion characteristics of an amplifier. [Solution] This bias control circuit (10) for controlling bias of an amplifier (20) for amplifying a high-frequency signal is provided with a detector (11) for detecting the envelope of the high-frequency signal, a first bias circuit (12) which supplies a uniform bias current to the amplifier (20), and a second bias circuit (14) which supplies a bias current that varies so as to conform to level variation of the envelope of the high-frequency signal.
(FR)La présente invention vise à supprimer la chute du gain par rapport à un signal à haute fréquence de bas niveau tout en réduisant les caractéristiques de distorsion d'un amplificateur. A cet effet, l'invention concerne un circuit de commande de polarisation (10) destiné à commander la polarisation d'un amplificateur (20) pour amplifier un signal à haute fréquence, lequel circuit de commande de polarisation (10) comprend un détecteur (11) pour détecter l'enveloppe du signal à haute fréquence, un premier circuit de polarisation (12) qui fournit un courant de polarisation uniforme à l'amplificateur (20) et un second circuit de polarisation (14) qui fournit un courant de polarisation qui varie afin de suivre la variation de niveau de l'enveloppe du signal à haute fréquence.
(JA)【課題】増幅器の歪み特性を緩和しつつ、低レベル高周波信号に対する利得低下を抑制する。 【解決手段】高周波信号を増幅する増幅器(20)のバイアスを制御するためのバイアス制御回路(10)は、高周波信号の包絡線を検波する検波器(11)と、増幅器(20)に一定のバイアス電流を供給する第一のバイアス回路(12)と、高周波信号の包絡線のレベル変動に追従して変動するバイアス電流を増幅器に供給する第二のバイアス回路(14)とを備える。
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, 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, KE, KG, KM, KN, KP, KR, 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, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 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 (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (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, ML, MR, NE, SN, TD, TG).
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)