Title :
A 900 MHz 2.2 mW spread spectrum clock generator based on direct frequency synthesis and harmonic injection locking
Author :
Lee, Woojae ; Cho, SeongHwan
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
This paper proposes a low power spread spectrum clock generator (SSCG). The proposed SSCG is based on direct frequency synthesis and harmonic injection locking due to the highly digital frequency modulation and low power implementation. The prototype of the SSCG is implemented in 0.13 ¿m CMOS process. The proposed SSCG can generate 900 MHz spread spectrum signal with spread ratio of 1%. The simulation results show that it has 35 dB EMI reduction and consumes 2.2 mW from 1.2 V supply.
Keywords :
CMOS integrated circuits; clocks; electromagnetic interference; pulse generators; CMOS; EMI reduction; digital frequency modulation; direct frequency synthesis; frequency 900 MHz; harmonic injection locking; low power implementation; power 2.2 mW; power spread spectrum clock generator; size 0.13 mum; voltage 1.2 V; CMOS process; Clocks; Frequency modulation; Frequency synthesizers; Injection-locked oscillators; Power generation; Power system harmonics; Prototypes; Signal synthesis; Spread spectrum communication; clock generator; direct frequency synthesis; harmonic injection locking; spread spectrum;
Conference_Titel :
SoC Design Conference (ISOCC), 2009 International
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5034-3
Electronic_ISBN :
978-1-4244-5035-0
DOI :
10.1109/SOCDC.2009.5423830
