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Segment Information (Tables) | 12 Months Ended
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Jan. 28, 2018
Segment Reporting [Abstract] |
Net sales by segment | Net sales by segment are as follows:
| Fiscal Year Ended
(in thousands) | January 28, 2018 |  | January 29, 2017 |  | January 31, 2016
Semiconductor Products Group | $ | 587,847 |  |  | $ | 544,067 |  |  | $ | 485,570 |
All others | — |  |  | 205 |  |  | 4,649 |
Total | $ | 587,847 |  |  | $ | 544,272 |  |  | $ | 490,219 |
Income by segment and reconciliation to consolidated | Income by segment and reconciliation to consolidated operating income:
| Fiscal Year Ended
(in thousands) | January 28, 2018 |  | January 29, 2017 |  | January 31, 2016
Semiconductor Products Group | $ | 160,810 |  |  | $ | 126,271 |  |  | $ | 83,422 |
All others | — |  |  | 23,406 |  |  | (3,670 | )
Operating income by segment | 160,810 |  |  | 149,677 |  |  | 79,752 |
Items to reconcile segment operating income to consolidated income before taxes |  |  |  |  |
Share-based compensation | 47,936 |  |  | 30,828 |  |  | 20,468 |
Intangible amortization | 27,867 |  |  | 25,301 |  |  | 25,059 |
Changes in the fair value of contingent earn-out obligations | 3,892 |  |  | (215 | ) |  | (16,362 | )
Other non-segment related expenses | 12,189 |  |  | 7,455 |  |  | 19,067 |
Amortization of fair value adjustments related to acquired property, plant and equipment | 190 |  |  | 2,227 |  |  | 1,521 |
Interest expense, net | 7,963 |  |  | 9,300 |  |  | 7,819 |
Non-operating expense, net | 902 |  |  | 1,721 |  |  | 1,801 |
Income before taxes | $ | 59,871 |  |  | $ | 73,060 |  |  | $ | 20,379 |
Net sales by product line | The table below provides net sales activity by product line on a comparative basis for all periods.
| Fiscal Year Ended
(in thousands, except percentages) | January 28, 2018 |  | January 29, 2017 |  | January 31, 2016
Signal Integrity | $ | 263,015 |  |  | 45 | % |  | $ | 258,824 |  |  | 47 | % |  | $ | 221,185 |  |  | 46 | %
Protection | 176,482 |  |  | 30 | % |  | 149,865 |  |  | 28 | % |  | 138,674 |  |  | 28 | %
Wireless and Sensing | 117,596 |  |  | 20 | % |  | 81,657 |  |  | 15 | % |  | 70,712 |  |  | 14 | %
Power and High-Reliability | 46,973 |  |  | 8 | % |  | 59,117 |  |  | 11 | % |  | 54,999 |  |  | 11 | %
Systems Innovation | — |  |  | — | % |  | 205 |  |  | — | % |  | 4,649 |  |  | 1 | %
Other: Warrant Shares | (16,219 | ) |  | (3 | )% |  | (5,396 | ) |  | (1 | )% |  | — |  |  | — | %
Total Net Sales | $ | 587,847 |  |  | 100 | % |  | $ | 544,272 |  |  | 100 | % |  | $ | 490,219 |  |  | 100 | %
Net sales by geographic region | Sales activity by geographic region is as follows:
| Fiscal Year Ended
(in thousands, except percentages) | January 28, 2018 |  | January 29, 2017 |  | January 31, 2016
Asia-Pacific | $ | 439,342 |  |  | 75 | % |  | $ | 412,167 |  |  | 76 | % |  | $ | 358,480 |  |  | 74 | %
North America | 121,144 |  |  | 21 | % |  | 94,123 |  |  | 17 | % |  | 46,152 |  |  | 9 | %
Europe | 43,580 |  |  | 7 | % |  | 43,378 |  |  | 8 | % |  | 85,587 |  |  | 17 | %
Other: Warrant Shares | (16,219 | ) |  | (3 | )% |  | (5,396 | ) |  | (1 | )% |  | — |  |  | — | %
Total Net Sales | $ | 587,847 |  |  | 100 | % |  | $ | 544,272 |  |  | 100 | % |  | $ | 490,219 |  |  | 100 | %
Sales activity to countries representing greater than 10% of total sales | The table below summarizes sales activity to countries that represented greater than 10% of total sales for at least one of the periods presented:
| Fiscal Year Ended
(percentage of total net sales) | January 28, 2018 |  | January 29, 2017 |  | January 31, 2016
China (including Hong Kong) | 51 | % |  | 48 | % |  | 47 | %
United States | 9 | % |  | 9 | % |  | 12 | %
Total Net Sales | 60 | % |  | 57 | % |  | 59 | %
Long-lived assets by location | Long-lived assets, which consist of property, plant and equipment, net of accumulated depreciation and classified by location are summarized as follows:
| Fiscal Year Ended
(in thousands) | January 28, 2018 |  | January 29, 2017
United States | $ | 48,289 |  |  | $ | 50,747 |
Rest of North America | 34,941 |  |  | 30,435 |
Europe | 9,752 |  |  | 8,821 |
Asia and all others | 31,624 |  |  | 18,907 |
Total | $ | 124,606 |  |  | $ | 108,910 |

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