Investors might want to bet on Texas Instruments (TXN), as earnings estimates for this company have been showing solid improvement lately. The stock has already gained solid short-term price momentum, and this trend might continue with its still improving earnings outlook.The rising trend in estimate revisions, which is a result of growing analyst optimism on the earnings prospects of this chipmaker, should get reflected in its stock price. After all, empirical research shows a strong correlation between trends in earnings estimate revisions and near-term stock price movements. Our stock rating tool -- the Zacks Rank -- has this insight at its core.The five-grade Zacks Rank system, which ranges from a Zacks Rank #1 (Strong Buy) to a Zacks Rank #5 (Strong Sell), has an impressive externally-audited track record of outperformance, with Zacks #1 Ranked stocks generating an average annual return of +25% since 2008.For Texas Instruments, there has been strong agreement among the covering analysts in raising earnings estimates, which has helped push consensus estimates considerably higher for the next quarter and full year.Current-Quarter Estimate RevisionsThe earnings estimate of $2.37 per share for the current quarter represents a change of +14.49% from the number reported a year ago.The Zacks Consensus Estimate for Texas Instruments has increased 8.53% over the last 30 days, as nine estimates have gone higher compared to no negative revisions.Current-Year Estimate RevisionsFor the full year, the earnings estimate of $9.35 per share represents a change of +13.2% from the year-ago number.In terms of estimate revisions, the trend for the current year also appears quite encouraging for Texas Instruments. Over the past month, 10 estimates have moved higher compared to one negative revision, helping the consensus estimate increase 7.37%.Favorable Zacks RankThanks to promising estimate revisions, Texas Instruments currently carries a Zacks Rank #2 (Buy). The Zacks Rank is a tried-and-tested rating tool that helps investors effectively harness the power of earnings estimate revisions and make the right investment decision. You can see the complete list of today's Zacks #1 Rank (Strong Buy) stocks here.Our research shows that stocks with Zacks Rank #1 (Strong Buy) and 2 (Buy) significantly outperform the S&P 500.Bottom LineWhile strong estimate revisions for Texas Instruments have attracted decent investments and pushed the stock 18.7% higher over the past four weeks, further upside may still be left in the stock. So, you may consider adding it to your portfolio right away. Zacks' Top Picks to Cash in on Electric Vehicles Big money has already been made in the Electric Vehicle (EV) industry. But, the EV revolution has not hit full throttle yet. There is a lot of money to be made as the next push for future technologies ramps up. Zacks’ Special Report reveals 5 picks investorsSee 5 EV Stocks With Extreme Upside Potential >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Texas Instruments Incorporated (TXN): Free Stock Analysis Report To read this article on Zacks.com click here.