Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Pulse multiplication or division
Reexamination Certificate
2008-05-27
2008-05-27
Lam, Tuan T. (Department: 2816)
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Pulse multiplication or division
C377S048000
Reexamination Certificate
active
11472824
ABSTRACT:
Within a mobile communication device (for example, a cellular telephone), there is a local oscillator. The local oscillator includes a novel frequency divider that includes a novel configurable multi-modulus divider (CMMD). The frequency divider is configurable into a selectable one of multiple configurations involving different mixes of synchronous and asynchronous circuitry. In each configuration, the frequency divider produces an amount of noise and consumes an amount of power. Power consumption is loosely inversely related to noise produced in that the modes with the highest power consumption produce the least amount of noise, and vice versa. The mobile communication device is operable in one of multiple different communication standards (for example, GSM, CDMA1X and WCDMA). The different communication standards impose different noise requirements on the frequency divider. By using the lowest power configuration that satisfies the noise requirements of the standard being used, power consumption of the cellular telephone is reduced.
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Narathong Chiewcharn
Su Wenjun
Braden Stanton
Lam Tuan T.
QUALCOMM Incorporated
Rouse Thomas R.
Seo Howard
LandOfFree
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