After the Bell -- Texas Instruments Up  NEW YORK (Reuters) - Shares of Texas Instruments Inc.  &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=TXN.N target=/stocks/quickinfo/fullquote"&gt;TXN.N&lt;/A&gt; rose after the market close on Thursday, after the chip  maker said it plans to buy back \$1 billion in stock and boost  its quarterly dividend by more than 17 percent.