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:
Mar. 24, 1998
Filed:
Dec. 04, 1995
James W Girardeau, Jr, Austin, TX (US);
David Yatim, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Data converter (10, 50, 150, 200) and method (250, 300) operate at variable sampling rates. Input gain stage (12) adjusts input bit stream (18) at an input bit rate (20) to produce gain adjusted bit stream (22). Integrator (14) and comb filter (16) operate on the gain adjusted bit stream (22) to produce a filtered bit stream (28) at an output bit rate (24). The gain of the integrator (14) and comb filter (16) pair varies with the sampling rates implemented. An input gain value of the input gain stage (12) adjusts to compensate for the gain of the integrator (14) and comb filter (16) pair to produce the filtered bit stream (28) within a predetermined dynamic range. DC offset stage (52) and output gain stage (54) provide further adjustment to the filtered bit stream (28). Data converters (10, 50) and method (250) convert data from a higher frequency bit rate to a lower frequency bit rate. Data converters (150, 200) and method (300) convert data from a lower frequency bit rate to a higher frequency bit rate.