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:
Apr. 15, 2008
Filed:
Nov. 30, 2006
Adrian Maxim, Austin, TX (US);
Richard A. Johnson, Buda, TX (US);
Adrian Maxim, Austin, TX (US);
Richard A. Johnson, Buda, TX (US);
Silicon Laboratories, Inc., Austin, TX (US);
Abstract
A receiver () includes a mixing digital-to-analog converter (DAC) (A), a direct digital frequency synthesizer (DDFS) () and a dynamic element matching (DEM) circuit (). A DAC of the mixing DAC (A) is implemented as a segmented DAC having a thermometer encoded DAC section (A) and a binary encoded DAC section (B). The DDFS () includes outputs configured to provide bits associated with a digital LO signal to inputs of a switching section (A,B) of the mixing DAC (A). The DEM circuit () is coupled between the outputs of the DDFS () and the inputs of the switching section (A) that are associated with the thermometer encoded DAC section (A). The DEM circuit () is configured to scramble the bits provided to the thermometer encoded DAC section (A).