Title :
A spread-spectrum clock generator with triangular modulation
Author :
Chang, Hsiang-Hui ; Hua, I-Hui ; Liu, Shen-Iuan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/2003 12:00:00 AM
Abstract :
In this paper, a spread-spectrum clock generator (SSCG) with triangular modulation is presented. Only a divider and a programmable charge pump are added into a conventional clock generator to accomplish the spread-spectrum function. The proposed circuit has been fabricated in a 0.35-μm CMOS single-poly quadruple-metal process. The proposed SSCG can generate clocks of 66, 133, and 266 MHz with center spread ratios of 0.5%, 1%, 1.5%, 2%, and 2.5%. Experimental results confirm the theoretical analyses.
Keywords :
CMOS digital integrated circuits; clocks; spread spectrum communication; waveform generators; 0.35 micron; 133 MHz; 266 MHz; 66 MHz; CMOS process; divider; programmable charge pump; spread-spectrum clock generator; triangular modulation; CMOS process; Charge pumps; Circuits; Clocks; Electromagnetic interference; Low pass filters; Phase locked loops; Signal generators; Spread spectrum communication; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.809521
