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. 12, 2002
Filed:
Feb. 29, 2000
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/10 ;
U.S. Cl.
CPC ...
H03M 1/10 ;
Abstract
A DC offset correction method and apparatus. In a DC offset correction loop ( ), a DC offset is corrected using a binary search routine or any other digital or analog DC offset correction technique. In this binary search routine, the sign of the offset ( ) is used to control a direction in which a digital to analog converter (DAC) ( ) is stepped until the least significant bit of the DAC is set. The process is enhanced by opening up the bandwidth of the baseband filters ( ) to permit the binary search to be clocked ( ) at a higher clock rate. After the correction is established, the filters ( ) are reset to normal operating conditions.