The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2008
Filed:
Mar. 22, 2007
Shawn Xianggang Yu, Austin, TX (US);
Terry L. Sculley, Austin, TX (US);
Shawn Xianggang Yu, Austin, TX (US);
Terry L. Sculley, Austin, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A sample rate converter suitable for use in an audio DAC includes a first estimating circuit (A) generating first (TR) and second (STAMPR) signals synchronized to an asynchronous clock (MCLK) and representing the period and edge arrival times, respectively, of a reference clock (REFCLK). A second estimating circuit (B) operates on the first and second signals to generate third (T) and fourth (STAMP) signals representing an input sample rate (32fsin) and arrival times of input data samples, respectively, which are applied to a coefficient and address generator () to generate read addresses and coefficients input to a FIFO memory () receiving digital input data at the input sample rate and a multiplication/accumulation circuit () receiving data from the FIFO memory. The multiplication/accumulation circuit produces an output signal (SRC-out) synchronized to the asynchronous clock at an output sample rate (32fsout).