Share-Based Compensation (Tables)

6 Months Ended

Jul. 28, 2012

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The following table presents details of share-based compensation expenses by functional line item (in thousands):

	Three Months Ended				Six Months Ended
	July 28, 2012		July 30, 2011		July 28, 2012		July 30, 2011
Cost of goods sold	$	1,775	$	1,916	$	3,898	$	3,611
Research and development		22,413		22,128		39,587		41,721
Selling and marketing		3,458		3,207		6,494		5,861
General and administrative		5,582		3,104		10,441		6,642
	$	33,228	$	30,355	$	60,420	$	57,835

Employee Stock Purchase Plan

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

	Three and Six Months Ended
	July 28, 2012			July 30, 2011
Employee Stock Purchase Plan:
Estimated fair value	$	3.77		$	4.09
Volatility		39	%		46	%
Expected term (in years)		1.3			0.5
Risk-free interest rate		0.2	%		0.2	%
Dividend yield		2.0	%		—

Market Based Option Award

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

	Three and Six Months Ended
	July 28, 2012			July 30, 2011
Market-based Stock Options:
Weighted average fair value	$	—		$	5.08
Expected volatility		—	%		42	%
Risk-free interest rate		—	%		0.9-3.6	%

Time Based Option Award

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following weighted average assumptions were used for each respective period to calculate the fair value of each time-based stock option award on the date of grant using the Black-Scholes valuation model and of each market-based equity award using a Monte Carlo simulation model:

	Three Months Ended						Six Months Ended
	July 28, 2012			July 30, 2011			July 28, 2012			July 30, 2011
Time-based Stock Options:
Weighted average fair value	$	3.73		$	6.24		$	5.59		$	6.09
Expected volatility		46	%		46	%		44	%		43	%
Expected term (in years)		4.8			4.8			4.8			4.8
Risk-free interest rate		0.7	%		1.7	%		0.9	%		2.1	%
Expected dividend yield		2.0	%		—			0-2.0	%		—