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:
Oct. 02, 2007
Filed:
May. 16, 2002
Sining Zhou, Los Angeles, CA (US);
Sining Zhou, Los Angeles, CA (US);
Silicon Storage Technology, Inc., Sunnyvale, CA (US);
Abstract
An apparatus and method for tracking a DC offset in a mixer circuit used in wireless communication systems and for providing local oscillator DC bias level-shifting to reduce even order distortion resulting from the DC offset is described. The apparatus has an input coupled to a mixer circuit output for receiving a DC voltage present on the mixer circuit output. The DC voltage includes an offset component. A level shifting circuit is coupled to the input for level shifting the received DC voltage a predetermined amount. An output of the level shifting circuit is coupled to a local oscillator input for outputting the level shifted DC voltage to the local oscillator input. The shift in the DC bias level at the local oscillator input of the mixer circuit provided by the apparatus and method reduces even order distortion in the mixer circuit, including second order intermodulation (IM2) distortion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile