07098709 is referenced by 7 patents and cites 9 patents.

This invention provides a clock generator which is capable of improving modulation accuracy without accompanying an increase in consumption current by steady current when spectrum spread of a clock signal is executed. The phase balanced voltage Vf to be inputted to the voltage control oscillator (VCO) 9 is modulated within a dead band region in which no difference signals Pr, Pr are outputted from the charge pump circuit 7 when a difference in oscillation frequency between an output clock signal fo and a reference clock signal fr is detected. Consequently, the output clock signal fo is changed within the range of a lock frequency in a PLL circuit, so as to execute the spectrum spread of the output clock signal fo while maintaining the lock state of the oscillation frequency in the PLL circuit.

Title
Spread-spectrum clock generator
Application Number
10/866985
Publication Number
7098709 (B2)
Application Date
June 15, 2004
Publication Date
August 29, 2006
Inventor
Tomonobu Miyata
Kasugai
JP
Koji Okada
Kasugai
JP
Takaaki Ido
Komaki
JP
Agent
Arent Fox PLLC
Assignee
Fujitsu
JP
IPC
H03L 7/06
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