Silicon Labs (Nasdaq: SLAB), a leader in high-performance, analog-intensive, mixed-signal integrated circuits (ICs), today reported record revenue for the fourth quarter and the full year. Revenue of $563.3 million for 2012 was an impressive 15 percent increase compared to 2011. Financial Highlights Fourth quarter revenue of $152.5 million was up 20 percent compared to the same period last year. On a GAAP-basis, gross margin improved meaningfully to 61.4 percent. R&D investment increased to $36.0 million, and SG&A expense increased to $32.3 million. Resulting GAAP operating income decreased to 16.6 percent. Diluted GAAP earnings per share increased to $0.44. For all of 2012, GAAP gross margin was 60 percent and operating expenses increased only slightly by two percent to $252.3 million, resulting in a five hundred basis point improvement in operating margin to 15.2 percent. GAAP earnings increased therefore by 86 percent to $1.47. The following non-GAAP results exclude the impact of stock compensation and other one-time items. Gross margin improved to 61.6 percent for the quarter. Operating expenses increased to 39.5 percent of revenue. R&D increased to $32.7 million, and SG&A increased to $27.5 million due to increasing product and sales activity as well as higher variable compensation driven by the outperformance for the quarter. Operating income for the quarter was a record for the year at 22.1 percent. Diluted earnings per share for the quarter were 61 cents, a 24 percent year-over-year increase. For all of 2012, Silicon Labs reduced operating expenses to 40.3 percent of revenue and improved operating income to 20.7 percent of revenue. Diluted earnings per share increased by 20 percent to $2.16. Reconciling charges are set forth in the financial measures table included below. The company repurchased 245 thousand shares of stock and ended the quarter with $293 million in cash, cash equivalents and investments due to continued healthy cash flow from operations.