0001104659-06-026905 10-Q 4 20060401 20060424 20060424 SILICON LABORATORIES INC 0001038074 3674 742793174 DE 1231 10-Q 34 000-29823 06774946 4635 BOSTON LN AUSTIN TX 78735 4635 BOSTON LANE AUSTIN TX 78735 10-Q 1 a06-9797_110q.htm QUARTERLY REPORT PURSUANT TO SECTIONS 13 OR 15(D) EX-31.1 2 a06-9797_1ex31d1.htm EX-31 EX-31.2 3 a06-9797_1ex31d2.htm EX-31 EX-32.1 4 a06-9797_1ex32d1.htm EX-32