Precision Digital SineWave Generation with the TMS32010 APPLICATION REPORT: SPRA007 Author: Domingo Garcia Digital Signal Processing – Semiconductor Group Digital Signal Processing Solutions 1989 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. Certain application using semiconductor products may involve potential risks of death, personal injury, or severe property or environmental damage (“Critical Applications”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. Inclusion of TI products in such applications is understood to be fully at the risk of the customer. Use of TI products in such applications requires the written approval of an appropriate TI officer. Questions concerning potential risk applications should be directed to TI through a local SC sales office. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Nor does TI warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. Copyright © 1997, Texas Instruments Incorporated TRADEMARKS TI is a trademark of Texas Instruments Incorporated. Other brands and names are the property of their respective owners. CONTACT INFORMATION US TMS320 HOTLINE (281) 274-2320 US TMS320 FAX (281) 274-2324 US TMS320 BBS (281) 274-2323 US TMS320 email [email protected] Precision Digital Sine-Wave Generation with the TMS32010 Abstract This report presents two methods of sine-wave generation. The first method is a fast direct table lookup scheme suitable for applications where speech is critical. The second approach, an enhancement of the first, includes linear interpolation to provide higher accurate waveforms. Precision Digital Sine-Wave Generation with the TMS32010 5 SPRA007 Product Support on the World Wide Web Our World Wide Web site at www.ti.com contains the most up to date product information, revisions, and additions. Users registering with TI&ME can build custom information pages and receive new product updates automatically via email. 6 Precision Digital Sine-Wave Generation with the TMS32010