Irvine's Broadcom Corp. said Monday it filed a lawsuit in federal court in Santa Ana against one-time acquisition target Emulex Corp. for alleged patent infringement. Broadcom contends that Emulex infringed on 10 of its patents for chips related to high-speed networking and data storage technologies, the company said in a statement. The suit covers technologies that brought the Irvine chipmaker and the Costa Mesa-based maker of electronics for data storage networks head to head earlier this year in a hostile takeover battle that lasted for months. In July, the battle ended with Broadcom dropping its bid to acquire Emulex after directors rejected its upped $912 million buyout offer from late June. The moves ended a public takeover drama that started with Broadcom's April offer of $764 million, which Emulex rejected on several occasions.