| US 7,587,189 B2 | ||
| Determination and processing for fractional-N programming values | ||
| Mitchell A. Buznitsky, Carlsbad, Calif. (US); Yuqian Cedric Wong, San Diego, Calif. (US); Daniel C. Bozich, San Diego, Calif. (US); and Brima B. Ibrahim, Los Angeles, Calif. (US) | ||
| Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
| Filed on Oct. 25, 2005, as Appl. No. 11/257,945. | ||
| Application 11/257945 is a continuation of application No. 10/054247, filed on Jan. 22, 2002, granted, now 6,993,306. | ||
| Prior Publication US 2006/0040632 A1, Feb. 23, 2006 | ||
| Int. Cl. H04B 7/00 (2006.01) | ||
| U.S. Cl. 455—258 [455/259; 455/255; 327/291; 327/298; 331/47; 331/18] | 20 Claims |
| 1. An apparatus, comprising
a clock measurement and processing circuit that is operative to determine a first frequency corresponding to a first clock
signal received thereby;
a radio frequency circuit, communicatively coupled to the clock measurement and processing circuitry, that operates using
a second clock signal having a second frequency;
a baseband processing circuitry, communicatively coupled to the clock measurement and processing circuitry, that operates
using a third clock signal having a third frequency; and
a low power oscillator, communicatively coupled to the clock measurement and processing circuitry, that is operative to provide
a fourth clock signal having a fourth frequency when the apparatus operates within an operational mode other than a low power
oscillator bypass mode; and wherein:
based on the operational mode and based on a comparison of the first frequency and the second frequency, the clock measurement
and processing circuitry is operative selectively to process the first clock signal or the fourth clock signal using a first
selected constant of a plurality of constants thereby generating the second clock signal; and a predetermined characteristic
corresponding to
based on the operational mode and based on a comparison of the first frequency and a predetermined characteristic corresponding
to the third frequency, the clock measurement and processing circuitry is operative selectively to process the first clock
signal or the fourth clock signal using a second selected constant of the plurality of constants thereby generating the third
clock signal.
|