UPDATE 1-AMD plans layoffs after recent rev warning-source

(adds details, background)

SAN FRANCISCO, Oct 12 (Reuters) - Advanced Micro Devices Inc

is planning significant layoffs, after the chipmaker warned this week its quarterly revenue would fall due to a weak global economy, a source familiar with the matter said on Friday.

The source, who asked not to be identified, told Reuters the layoffs would be close to a range of 10 percent to 20 percent.

As of February, AMD had 11,705 employees worldwide.

Technology blogs including CNET and All Things D reported earlier that AMD could cut between 20 percent and 30 percent of its workforce.

AMD declined to comment.

On Thursday, AMD warned that its third-quarter revenue likely fell about 10 percent from the previous quarter.

(Reporting By Noel Randewich; editing by Carol Bishopric)

((noel.randewich@thomsonreuters.com)(Twitter handle: @randewich)(415)(677 2542)(Reuters Messaging: noel.randewich.thomsonreuters.com@reuters.net))