| US 7,567,614 B2 | ||
| Altering power consumption in communication links based on measured noise | ||
| Juan Antonio Carballo, Austin, Tex. (US); Hayden Clavie Cranford, Jr., Cary, N.C. (US); Gareth John Nicholls, Brockenhurst (United Kingdom); Vernon Roberts Norman, Cary, N.C. (US); and Brian Joel Schuh, Apex, N.C. (US) | ||
| Assigned to International Business Machines Corporation, Armonk, N.Y. (US) | ||
| Filed on Jun. 10, 2008, as Appl. No. 12/136,205. | ||
| Application 12/136205 is a continuation of application No. 11/079952, filed on Mar. 15, 2005, granted, now 7,418,032. | ||
| Prior Publication US 2008/0232530 A1, Sep. 25, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04B 3/46 (2006.01) | ||
| U.S. Cl. 375—227 [375/346; 375/371; 375/224; 375/231; 375/226; 455/67.11; 455/67.12; 455/67.13] | 12 Claims |
| 1. A circuit, comprising:
a receive circuitry configured to receive a signal transmitted over a communication link;
a clock and data recovery circuit coupled to said receive circuitry, wherein said clock and data recovery circuit is configured
to recover a clock signal from said received signal;
a noise monitor coupled to a sampling unit in said clock and data recovery circuit, wherein said noise monitor is configured
to measure a type of noise in said received signal sampled by said sampling unit;
an overall jitter monitor coupled to said sampling unit in said clock and data recovery circuit, wherein said overall jitter
monitor is configured to measure an overall jitter in said received signal sampled by said sampling unit; and
a controller coupled to said noise monitor and to said overall jitter monitor, wherein said controller comprises:
a first module, wherein said first module is configured to receive said measured noise and said measured overall jitter, wherein
said first module is further configured to determine a difference between said measured noise and said measured overall jitter,
wherein said first module is further configured to use said difference while taking into consideration a quantity of said
measured overall jitter to index into a table to obtain an estimator; and
a second module coupled to said first module, wherein said second module is configured to classify said noise in said received
signal based on said estimator, wherein said second module is further configured to adjust power consumption of said circuit
based on said classification of said noise.
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