Clock spreading systems and methods

Modulators – Phase modulator

Reexamination Certificate

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Details

C327S237000, C327S241000, C370S278000, C370S282000, C375S135000, C375S136000, C375S146000, C375S147000

Reexamination Certificate

active

07944319

ABSTRACT:
Clock spreading systems and methods are disclosed. In one embodiment of the invention, a clock spreading system is provided in an integrated transceiver system that comprises a base band control system and a transceiver coupled to the base band control system. The clock spreading system provides a spread clock output signal derived from a clock reference signal for clocking one of the base band control system and the transceiver. The clock spreading system is configured to provide a periodic phase modulated spread clock output signal during receiving of data in a receive mode and a pseudo-random phase modulated spread clock output signal during transmitting of data in a transmit mode.

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patent: 2010/0054377 (2010-03-01), Havener
Moon et al: “Clock Dithering for Electromagnetic Compliance Using Spread Spectrum Phase Modulation”; ISSCC99/Session 10/Paper TA 10.6; 1999 IEEE International Solid-State Circuits Conference, pp. 186-188.

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