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. (WO1999010987) PREDISTORTION LINEARIZER CIRCUIT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1999/010987    International Application No.:    PCT/FI1998/000649
Publication Date: 04.03.1999 International Filing Date: 24.08.1998
Chapter 2 Demand Filed:    29.03.1999    
IPC:
H03F 1/32 (2006.01), H04B 1/62 (2006.01)
Applicants: YLINEN ELECTRONICS OY [FI/FI]; Teollisuustie 9 A FIN-02700 Kauniainen (FI) (AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, CA, CF, CG, CH, CI, CM, CN, CU, CY, CZ, DE, DK, EE, ES, FI, FR, GA, GB, GE, GH, GM, GN, GR, GW, HR, HU, ID, IE, IL, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MC, MD, MG, MK, ML, MN, MR, MW, MX, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW only).
KANGASLAHTI, Pekka [FI/FI]; (FI) (For US Only).
KALAJO, Sami [FI/FI]; (FI) (For US Only)
Inventors: KANGASLAHTI, Pekka; (FI).
KALAJO, Sami; (FI)
Agent: KOLSTER OY AB; Iso Roobertinkatu 23 P.O. Box 148 FIN-00121 Helsinki (FI)
Priority Data:
973525 27.08.1997 FI
Title (EN) PREDISTORTION LINEARIZER CIRCUIT
(FR) CIRCUIT DE LINEARISATION DE PREDISTORSION
Abstract: front page image
(EN)A predistortion linearizer circuit comprising an amplitude distorting part (AM/AM) and a phase distorting part (AM/PM). At least the phase distorting part (AM/PM) comprises broadband biasing means (51) and a non-linear transmission line (L51/D51 to L55/D55) responsive to them. The biasing means (51) are arranged to bias the non-linear transmission line (L51/D51 to L55/D55) to a substantially phase distorting area. The characteristics of the circuit can be changed by adjusting a biasing voltage (VB1) or by switching some of the diodes (D54, D55) inactive by activation signals (VA1, VA2). The amplitude distorting part (AM/AM) and the phase distorting part (AM/PM) can be similar in structure, but the diodes (D51 to D55) are partly forward-biased, whereby the losses caused by them decrease the amplitude of the signal.
(FR)Ce circuit de linéarisation de prédistorsion comporte un élément de distorsion d'amplitude (AM/AM) et un élément de distorsion de phase (AM/PM). L'élément de distorsion de phase (AM/PM), celui-ci au moins, comporte des systèmes de polarisation de bande large (51) et une ligne de transmission non linéaire (L51/D51 - L55/D55) réagissant à ceux-ci. Ces systèmes de polarisation (51) sont conçus pour polariser la ligne de transmission non linéaire (L51/D51 - L55/D55) vers une zone sensiblement de distorsion de phase. Il est possible de modifier les caractéristiques du circuit par adaptation d'une tension de polarisation (VB1) ou par commutation de certaines diodes (D54, D55), les désactivant au moyen de signaux d'activation (VA1, VA2). L'élément de distorsion d'amplitude (AM/AM) et l'élément de distorsion de phase (AM/PM) peuvent avoir une structure similaire mais les diodes (D51 - D55) sont en partie polarisées en sens direct, les pertes qu'elles occasionnent réduisant l'amplitude du signal.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, HR, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)