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Goodwill and Intangible Assets
 12 Months Ended
Jan. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill
The carrying amounts of goodwill by applicable reporting unit were as follows:
(in thousands)Signal IntegrityWireless and SensingProtectionTotal
Balance at January 31, 2021$274,085 $72,128 $4,928 $351,141 
Balance at January 30, 2022$274,085 $72,128 $4,928 $351,141 
Goodwill is not amortized, but is tested for impairment at the reporting unit level using either a qualitative or quantitative assessment on an annual basis during the fourth quarter of each fiscal year, and whenever events or changes in circumstances indicate that the carrying value may not be recoverable. Impairment of goodwill is measured at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair market value of the reporting unit. The reporting units are the same as the operating segments, which have been aggregated into two reportable segments (see Note 15 on segment information). For fiscal years 2022 and 2021, the Company performed a qualitative assessment and concluded that it was more likely than not that the fair value of each of the three reporting units exceeded its carrying value. For fiscal year 2020, the Company performed a quantitative assessment that demonstrated that the fair value of the reporting units was higher than their respective carrying values. As of January 30, 2022 and January 31, 2021, there were no indications of impairment of the Company's goodwill balances, and no impairment to goodwill was recorded during fiscal years 2022, 2021 or 2020.
Purchased Intangibles
The following table sets forth the Company’s finite-lived intangible assets resulting from business acquisitions and technology licenses purchased, which are amortized over their estimated useful lives:
 January 30, 2022January 31, 2021
(in thousands)Estimated
Useful Life		Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount		Gross
Carrying
Amount		Accumulated
Amortization		Net Carrying
Amount
Core technologies
6-8 years
$26,300 $(19,496)$6,804 $29,300 $(17,554)$11,746 
Total finite-lived intangible assets$26,300 $(19,496)$6,804 $29,300 $(17,554)$11,746 
Amortization expense of finite-lived intangible assets, which was recorded in "Intangible Amortization" in the Statements of Income, was as follows:
(in thousands)January 30, 2022January 31, 2021January 26, 2020
Core technologies$4,942 $7,676 $14,263 
Customer relationships— 589 2,283 
Total amortization expense$4,942 $8,265 $16,546 
Future amortization expense of finite-lived intangible assets is expected as follows:
(in thousands) 
To be recognized in:Total
Fiscal year 2023$4,002 
Fiscal year 20241,676 
Fiscal year 2025288 
Fiscal year 2026288 
Fiscal year 2027288 
Thereafter262 
Total expected amortization expense$6,804