Goodwill And Intangible Assets (Tables)

9 Months Ended

Oct. 30, 2011

Goodwill And Intangible Assets [Abstract]

Schedule Of Finite-Lived Intangible Assets

			October 30, 2011							January 30, 2011
(in thousands)	Estimated Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Core technologies		2-10 years	$	65,900	$	(19,296	)	$	46,604	$	65,900	$	(14,006	)	$	51,894
Customer relationships		8-10 years		12,130		(2,589	)		9,541		12,130		(1,571	)		10,559
Technology licenses (1)		5 years		3,000		(100	)		2,900		—		—			—
Total finite-lived intangbile assets			$	81,030	$	(21,985	)	$	59,045	$	78,030	$	(15,577	)	$	62,453

(1) Technology licenses relate to licensing agreements entered into by the Company.

Schedule Of Indefinite-Lived Intangible Assets

	October 30, 2011							January 30, 2011
(in thousands)	Gross Carrying Amount		Accumulated Impairment Loss			Net Carrying Amount		Gross Carrying Amount		Accumulated Impairment Loss		Net Carrying Amount
In-process research and development	$	12,370	$	(2,470	)	$	9,900	$	12,370	$	—	$	12,370
Total indefinite-lived intangible assets	$	12,370	$	(2,470	)	$	9,900	$	12,370	$	—	$	12,370

Impairment Charges Against In-Process Research And Development

In-process research and development impairment	Net Carrying Amount		Impairment
High-speed switching technology for power management applications (1)	$	2,070	$	(2,070	)
Integrated driver for telecommunications applications (2)		400		(400	)
Total	$	2,470	$	(2,470	)

(1) related to the February 2009 Leadis Technology Inc. acquisition.

(2) related to the December 2009 Sierra Monolithics, Inc. acquisition.