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:
Feb. 06, 2007
Filed:
Sep. 20, 2002
Wesley K. Masenten, Irvine, CA (US);
Keith Soo Hoo, Long Beach, CA (US);
Peter Stubberud, Henderson, NV (US);
Thang Victor Dinh, Westminster, CA (US);
Elias Dagher, Aliso Viejo, CA (US);
Wesley K. Masenten, Irvine, CA (US);
Keith Soo Hoo, Long Beach, CA (US);
Peter Stubberud, Henderson, NV (US);
Thang Victor Dinh, Westminster, CA (US);
Elias Dagher, Aliso Viejo, CA (US);
DiTrans IP, Inc., Menlo Park, CA (US);
Abstract
An improved complex-IF digital receiver has various improvements. The improved complex-IF digital receiver, for single or dual band applications, preferably synchronizes all of the signals to each other, which may be an integer multiple of each other. For example, the decimation filter, delta-sigma modulator, sensitivity DAC, and other circuits in the receiver can be synchronized. The delta-sigma modulator preferably includes a comparator whose input is coupled to a sensitivity DAC or synchronous dithering circuit. Ideally, the sensitivity DAC forces the comparator to trigger at every clock cycle and reduces the effect of hysteresis and offset at the input of the comparator. The receiver includes a translation circuit that translates an intermediate frequency signal to baseband, where the translation circuit preferably operates a translation ratio that is a multiple of 4.