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1. (WO2011016647) SPREAD-SPECTRUM CLOCK GENERATOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2011/016647    International Application No.:    PCT/KR2010/005000
Publication Date: 10.02.2011 International Filing Date: 29.07.2010
IPC:
H03L 7/099 (2006.01), H03L 7/093 (2006.01)
Applicants: SILICON WORKS CO., LTD [KR/KR]; 707 Tamnip-dong Yuseong-gu, Daejeon 305-510 (KR) (For All Designated States Except US).
HAN, Dae Keun [KR/KR]; (KR) (For US Only).
MOON, Yong Hwan [KR/KR]; (KR) (For US Only)
Inventors: HAN, Dae Keun; (KR).
MOON, Yong Hwan; (KR)
Agent: LEE, Cheol Hee; Guardian International Patent & Law Office 2F Woo Kyeong Bldg., 156-13 Samseong-dong Kangnam-ku, Seoul 135-090 (KR)
Priority Data:
10-2009-0072286 06.08.2009 KR
Title (EN) SPREAD-SPECTRUM CLOCK GENERATOR
(FR) GÉNÉRATEUR D'HORLOGE À SPECTRE ÉTALÉ
(KO) 스프레드 스펙트럼 클럭 발생기
Abstract: front page image
(EN)The present invention relates to a technique for designing a spread-spectrum clock generator. Instead of using a general sigma-delta frequency synthesizer or an analog frequency modulation system, the spread-spectrum clock generator of the present invention comprises a phase frequency detector (PFD), a charge pump (CP), a loop filter and an oscillator, the frequency of which is adjusted by an analog voltage signal and an N-bit digital signal. According to the present invention, the spread-spectrum clock generator can be easily produced, and is advantageous in that a frequency modulation ratio is insensitive to the power voltage and peripheral temperature (PVT) variation and process variation.
(FR)La présente invention concerne une technique de conception d'un générateur d'horloge à spectre étalé. Plutôt que d'utiliser un synthétiseur de fréquence sigma-delta classique ou un système de modulation de fréquence analogique, le générateur d'horloge à spectre étalé selon la présente invention comprend un détecteur de fréquence de phase (PFD), une pompe à charge (CP), un filtre à boucle et un oscillateur, dont la fréquence est ajustée par un signal de tension analogique et un signal numérique à N-bit. Selon la présente invention, le générateur d'horloge à spectre étalé peut être produit facilement et présente l'avantage que le rapport de modulation de fréquence est insensible à la tension de puissance et aux variations de la température périphérique (PVT) et du traitement.
(KO)본 발명은 스프레드 스펙트럼 클럭 발생기의 설계기술에 관한 것이다. 본 발명에서는 일반적인 시그마-델타 주파수 합성기 또는 아날로그 주파수 변조 방식을 사용하는 대신, 위상 주파수 검출기(PFD), 챠지 펌프(CP), 루프 필터(Loop filter) 및 아날로그 전압 신호와 N 비트의 디지털 신호로 주파수가 조정되는 오실레이터를 사용하여 스프레드 스펙트럼 클럭 발생기를 구현하였다. 따라서, 스프레드 스펙트럼 클럭 발생기의 구현이 용이하고, 주파수 변조 비율(modulation ratio)이 주변의 온도, 전원 전압 및 프로세스 변화(PVT variation)에 둔감한 장점이 있다.
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, 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, PE, PG, PH, PL, PT, RO, RS, RU, 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, 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, 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: Korean (KO)
Filing Language: Korean (KO)