Silicon Laboratories Inc. reported unaudited consolidated earnings results for the fourth quarter and full year ended December 31, 2011. For the quarter, the company reported operating income of $15.233 million, income before income taxes of $15.779 million and net income of $12.805 million or $0.29 per diluted share on revenue of $126.692 million compared to operating income of $11.014 million, income before income taxes of $11.506 million and net income of $12.883 million or $0.28 per diluted share on revenue of $111.891 million a year ago. Non-GAAP net income was $21.384 million or $0.49 per diluted share. For the year, the company reported operating income of $50.074 million, income before income taxes of $52.340 million and net income of $35.472 million or $0.79 per diluted share on revenue of $491.625 million compared to operating income of $86.671 million, income before income taxes of $87.659 million and net income of $73.242 million or $1.57 per diluted share on revenue of $493.341 million a year ago. Net cash provided by operating activities were $88.742 million compared to $117.935 million a year ago. Purchases of property and equipment were $8.690 million compared to $13.850 million a year ago. The company expects revenue for the first quarter of 2012 to be in the range of $120 million to $125 million. The company expects tax rate to increase. The non-GAAP tax rate will be about 18% beginning in first quarter, which translates to a $0.02 EPS impact for the quarter. The company expects gross margin to sustain the current range. On a GAAP basis, the company projects earnings were $0.20 to $0.24. On a non-GAAP basis, excluding stock compensation expense, expects $0.38 to $0.42.