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IEICE TRANSACTIONS on Electronics

An Ultra-Wide Range Digitally Adaptive Control Phase Locked Loop with New 3-Phase Switched Capacitor Loop Filter

Shiro DOSHO, Naoshi YANAGISAWA, Kazuaki SOGAWA, Yuji YAMADA, Takashi MORIE

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Summary :

It is an innovative idea for modern PLL generation to control the bandwidth proportionally to the reference frequency. Recently, a frequency of the operating clock in microprocessors has been required to be changed frequently and widely in order to manage power consumption and throughput. A new compact switched capacitor (SC) filter which has fully flat response has been developed for adaptive biased PLLs. We have also developed a new digital control method for achieving the wider frequency range. The measured performances of the test chip were good enough for the use in the microprocessors.

Publication
IEICE TRANSACTIONS on Electronics Vol.E90-C No.6 pp.1197-1202
Publication Date
2007/06/01
Publicized
Online ISSN
1745-1353
DOI
10.1093/ietele/e90-c.6.1197
Type of Manuscript
Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
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