Frequency modulation circuit

Details Frequency modulation circuit Frequency modulation circuit

2007-06-19

2007-06-19

Pascal, Robert (Department: 2817)

Modulators

Frequency modulator

C327S147000, C327S156000, C331S045000, C331S074000

Reexamination Certificate

active

11000224

ABSTRACT:
The frequency modulation circuit includes: a phase shift section for receiving a multiphase clock signal composed of a plurality of clock signals having a predetermined phase difference therebetween and shifting the phase of the multiphase clock signal; a clock selection section for selecting a clock signal constituting the multiphase clock signal output from the phase shift section; and a modulation control section for controlling the phase shift section and the clock selection section so that a clock signal having a frequency different from the frequency of the multiphase clock signal input into the phase shift section is output from the clock selection section.

REFERENCES:
patent: 6114914 (2000-09-01), Mar
patent: 6753712 (2004-06-01), Saeki
patent: 2001/0036239 (2001-11-01), Oka
patent: 2002/0079938 (2002-06-01), Saeki
patent: 1360396 (2002-07-01), None
patent: 2001-044826 (2001-02-01), None
patent: 2001-251185 (2001-09-01), None
Serial ATA Workgroup, “Serial ATA: High Speed Serialized AT Attachment”; Revision 1.0a; Jan. 7, 2003; pp. 83-85.

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