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:
May. 09, 2000
Filed:
Feb. 27, 1997
Alfredo R Linz, Austin, TX (US);
Advanced Micro Devices, Austin, TX (US);
Abstract
A communication system includes a data sampling rate converter that uses a closed-loop control arrangement to convert an input signal at a first sampling rate to a second, asynchronous, sampling rate without requiring extensive input buffering. A number of data registers in a first-in-first-out input buffer are used to receive and store data samples at the first rate and to pass the data samples from the input buffer at a controlled rate. The input buffer indicates the current capacity of the input buffer circuit for use by a frequency ratio estimation circuit, which is arranged to respond by providing an estimate of the actual ratio between the first rate and the second rate. A control circuit responds to the frequency ratio estimation circuit by generating the controlled rate at which the data samples are to be passed from the input buffer. In this manner, the data samples are passed from the input buffer at the controlled rate for processing and outputting the data at the second rate.