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:
Dec. 30, 2003
Filed:
May. 16, 2000
Applicant:
Inventors:
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 2/708 ;
U.S. Cl.
CPC ...
H04L 2/708 ;
Abstract
In a radio circuit ( ) that forwards a signal pair (I,Q) by a first channel ( , I) and by a second channel ( , Q), a gain controller ( ) monitors differences between the overall gains (G , G ) in the channels and corrects a gain imbalance by feeding back a gain determining control signal (W) to one of the channels. The controller has first ( ) and second ( ) pluralities of single-bit comparators, operating at a high sampling rate, to monitor the signal pair at the channel inputs ( ) and at the channel outputs ( ), respectively, and to provide difference signals (&Dgr;X,&Dgr;Y) to an integrator ( ) that calculates the gain control signal (W) at a decimated sampling rate (F ).