Xilinx (XLNX +2.7%) is entering an "extended period of above industry growth," says Citi's Glen Yeung while upgrading shares to Buy. Altera (ALTR +1.6%) is up in sympathy. Yeung sees ramping Chinese 4G spend acting as a growth driver; Xilinx's FPGAs are often used in base stations and other mobile infrastructure gear. 2 days ago, Xilinx announced it had taped out an UltraScale FPGA (offers ASIC-like features) that uses TSMC's next-gen 20nm process, and boasted it has a 6-month to 12-month+ lead (depending on FPGA type) over rivals in taping out 20nm parts. Xilinx also has an aggressive timetable for using TSMC's 16nm process. Altera plans to counter by adopting Intel's 14nm process. Xilinx reports on July 17, and Altera on July 23.