CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2013	Jul. 29, 2012	Jul. 28, 2013	Jul. 29, 2012
Revenue	$ 977,238	$ 1,044,270	$ 1,931,977	$ 1,969,147
Cost of revenue	431,700	503,551	867,871	965,064
Gross profit	545,538	540,719	1,064,106	1,004,083
Operating expenses
Research and development	331,738	281,193	658,899	565,095
Sales, general and administrative	108,266	119,903	216,892	226,539
Total operating expenses	440,004	401,096	875,791	791,634
Income from operations	105,534	139,623	188,315	212,449
Interest income	3,865	5,316	8,941	10,514
Other income (expense), net	2,421	269	2,626	(660)
Income before income tax expense	111,820	145,208	199,882	222,303
Income tax expense	15,372	26,162	25,543	42,820
Net income	$ 96,448	$ 119,046	$ 174,339	$ 179,483
Basic net income per share	$ 0.16	$ 0.19	$ 0.29	$ 0.29
Shares used in basic per share computation	585,345	618,996	601,109	617,388
Diluted net income per share	$ 0.16	$ 0.19	$ 0.29	$ 0.29
Shares used in diluted per share computation	592,006	623,143	606,051	623,397
Cash dividends declared and paid per common share	$ 0.075	$ 0	$ 0.150	$ 0