Wide Frequency-Range Spread-Spectrum Clock Generator with Digital Modulation Control

Takashi KAWAMOTO; Masato SUZUKI; Takayuki NOTO

doi:10.1587/transele.E96.C.935

Wide Frequency-Range Spread-Spectrum Clock Generator with Digital Modulation Control

Takashi KAWAMOTO, Masato SUZUKI, Takayuki NOTO

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A technique that enables a SSCG to fine-tune an output signal frequency and a spread ratio is presented. Proposed SSCG achieves the output signal frequency from 1.2 GHz to 3.0 GHz and the spread ratio from 0 to 30000 ppm. The fine-tuning technique achieves 30 ppm adjustment of the output signal frequency and 200 ppm adjustment of the spread ratio. This technique is achieved by controlling a triangular modulation signal characteristics generated by a proposed digital controlled wave generator. A proposed multi-modulus divider can have a divide ratio of 4/5 and 8/9. This SSCG has been fabricated in a 0.13-µm CMOS process. The output signal frequency-range and the spread ratio are achieved fluently from 0.1 to 3.0 GHz and from 0 to 30000 ppm, respectively. EMI noise is suppressed at less than 17.1 dB at the output signal frequency of 3.0 GHz and spread ratio of 30000 ppm.

Publication: IEICE TRANSACTIONS on Electronics Vol.E96-C No.6 pp.935-941

Publication Date: 2013/06/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1587/transele.E96.C.935

Type of Manuscript: PAPER

Category: Electronic Circuits

Authors

Takashi KAWAMOTO
  Central Research Laboratory, Hitachi Ltd.
Masato SUZUKI
  Renesas Electronics
Takayuki NOTO
  Renesas Electronics

Keyword

spread-spectrum clock generator, PLL, VCO, multi-modulus divider

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Takashi KAWAMOTO, Masato SUZUKI, Takayuki NOTO, "Wide Frequency-Range Spread-Spectrum Clock Generator with Digital Modulation Control" in IEICE TRANSACTIONS on Electronics, vol. E96-C, no. 6, pp. 935-941, June 2013, doi: 10.1587/transele.E96.C.935.
Abstract: A technique that enables a SSCG to fine-tune an output signal frequency and a spread ratio is presented. Proposed SSCG achieves the output signal frequency from 1.2 GHz to 3.0 GHz and the spread ratio from 0 to 30000 ppm. The fine-tuning technique achieves 30 ppm adjustment of the output signal frequency and 200 ppm adjustment of the spread ratio. This technique is achieved by controlling a triangular modulation signal characteristics generated by a proposed digital controlled wave generator. A proposed multi-modulus divider can have a divide ratio of 4/5 and 8/9. This SSCG has been fabricated in a 0.13-µm CMOS process. The output signal frequency-range and the spread ratio are achieved fluently from 0.1 to 3.0 GHz and from 0 to 30000 ppm, respectively. EMI noise is suppressed at less than 17.1 dB at the output signal frequency of 3.0 GHz and spread ratio of 30000 ppm.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E96.C.935/_p

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@ARTICLE{e96-c_6_935,
author={Takashi KAWAMOTO, Masato SUZUKI, Takayuki NOTO, },
journal={IEICE TRANSACTIONS on Electronics},
title={Wide Frequency-Range Spread-Spectrum Clock Generator with Digital Modulation Control},
year={2013},
volume={E96-C},
number={6},
pages={935-941},
abstract={A technique that enables a SSCG to fine-tune an output signal frequency and a spread ratio is presented. Proposed SSCG achieves the output signal frequency from 1.2 GHz to 3.0 GHz and the spread ratio from 0 to 30000 ppm. The fine-tuning technique achieves 30 ppm adjustment of the output signal frequency and 200 ppm adjustment of the spread ratio. This technique is achieved by controlling a triangular modulation signal characteristics generated by a proposed digital controlled wave generator. A proposed multi-modulus divider can have a divide ratio of 4/5 and 8/9. This SSCG has been fabricated in a 0.13-µm CMOS process. The output signal frequency-range and the spread ratio are achieved fluently from 0.1 to 3.0 GHz and from 0 to 30000 ppm, respectively. EMI noise is suppressed at less than 17.1 dB at the output signal frequency of 3.0 GHz and spread ratio of 30000 ppm.},
keywords={},
doi={10.1587/transele.E96.C.935},
ISSN={1745-1353},
month={June},}

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TY - JOUR
TI - Wide Frequency-Range Spread-Spectrum Clock Generator with Digital Modulation Control
T2 - IEICE TRANSACTIONS on Electronics
SP - 935
EP - 941
AU - Takashi KAWAMOTO
AU - Masato SUZUKI
AU - Takayuki NOTO
PY - 2013
DO - 10.1587/transele.E96.C.935
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E96-C
IS - 6
JA - IEICE TRANSACTIONS on Electronics
Y1 - June 2013
AB - A technique that enables a SSCG to fine-tune an output signal frequency and a spread ratio is presented. Proposed SSCG achieves the output signal frequency from 1.2 GHz to 3.0 GHz and the spread ratio from 0 to 30000 ppm. The fine-tuning technique achieves 30 ppm adjustment of the output signal frequency and 200 ppm adjustment of the spread ratio. This technique is achieved by controlling a triangular modulation signal characteristics generated by a proposed digital controlled wave generator. A proposed multi-modulus divider can have a divide ratio of 4/5 and 8/9. This SSCG has been fabricated in a 0.13-µm CMOS process. The output signal frequency-range and the spread ratio are achieved fluently from 0.1 to 3.0 GHz and from 0 to 30000 ppm, respectively. EMI noise is suppressed at less than 17.1 dB at the output signal frequency of 3.0 GHz and spread ratio of 30000 ppm.
ER -