Signal generating apparatus and method thereof

Details Signal generating apparatus and method thereof Signal generating apparatus and method thereof

2011-08-02

2011-08-02

Torres, Juan A (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

Reexamination Certificate

active

07991102

ABSTRACT:
A signal generating apparatus includes: a test data generator for generating a test data; a fractional-N phase-locked loop device coupled to the test data generator for generating a synthesized signal according to the test data when the test data is received; and a calibrating device coupled to the fractional-N phase-locked loop device for measuring power of the synthesized signal to generate a calibration signal utilized for adjusting the fractional-N phase-locked loop device.

REFERENCES:
patent: 6724265 (2004-04-01), Humphreys
patent: 2005/0185749 (2005-08-01), Convent et al.
patent: 2006/0088126 (2006-04-01), Puma
patent: 2007/0146083 (2007-06-01), Hein et al.
McMahill, “Automatic calibration of modulated fractional-N frequency synthesizer”, MIT 2001 section 2.4-2.5 p. 30-32 (see dspace.mit.edu/bitstream/handle/1721.1/16780/ 49545342.pdf?
Akamine, “A loop-bandwidth calibration system for fractional-N synthesizer and ΔΣ-PLL transmitter”, Digest of Technical Papers, ISSCC. 2005 IEEE International Solid-State Circuits Conference, 2005, Publication Year: 2005 , pp. 314-600 vol. 1.

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