Texas Instruments Plans Buyback &lt;p&gt;\&lt;/p&gt;&lt;p&gt; SAN FRANCISCO (Reuters) - Texas Instruments Inc., the\largest maker of chips for cellular phones, on Thursday said it\plans to buy back \$1 billion in stock and boost its quarterly\dividend by more than 17 percent, becoming the latest\technology company to return extra cash to investors.&lt;/p&gt;