BEIJING/FRANKFURT (Reuters) - The sale of Aixtron to Chinese investors could go ahead under new terms if the German semiconductor equipment maker sells its Silicon Valley division separately to get around U.S. objections, analysts said Monday. On Friday, U.S. President Barack Obama stopped Fujian Grand Chip Investment Fund (FGC) from buying Aixtron U.S., the division of the German company in California where nearly a fifth of its 713-strong workforce is based. While the 670 million euro ($717 million) deal is small, U.S. opposition is seen as a sign of growing concern in the West about the acquisition of new technology by Chinese players and comes after Washington blocked the sale by Philips of its U.S. lighting business to Asian buyers.