A/D converter, digital PLL circuit using the same, and...

Details A/D converter, digital PLL circuit using the same, and... A/D converter, digital PLL circuit using the same, and...

2006-08-15

2006-08-15

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C360S051000, C375S375000

Reexamination Certificate

active

07091895

ABSTRACT:
An A/D converter includes a low-bit resolution A/D which converts an input signal into a digital value of 4 bits or less, and a low-pass digital filter which suppresses a high-frequency-band component in an output from the low-bit resolution A/D, and extracts phase information contained in the input signal as amplitude information. A digital PLL circuit and information recording apparatus are also disclosed.

REFERENCES:
patent: 6687841 (2004-02-01), Marukawa
patent: 6873668 (2005-03-01), Yamamoto et al.
patent: 6891490 (2005-05-01), Hales
patent: 2003/0007273 (2003-01-01), Haraguchi et al.
patent: 2004/0090355 (2004-05-01), Mayes
patent: H09-247136 (1997-09-01), None
patent: 11-031924 (1999-02-01), None
patent: 2002-217720 (2002-08-01), None
patent: 2003-078409 (2003-03-01), None
patent: 2003-115174 (2003-04-01), None
patent: 2003-209468 (2003-07-01), None

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