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:
Aug. 19, 2008
Filed:
Oct. 14, 2005
Mei-fen Chou, HsinChu, TW;
Kuei-ann Wen, HsinChu, TW;
Chun-yen Chang, HsinChu, TW;
Other;
Abstract
In the dual-band mixer of this invention, a current combined load is presented and is shared by two separate working frequency bands. In the invented dual-band mixer, a switch is provided to connect and disconnect an adjust capacitor series to the load inductors. By determining the capacitance of respective capacitors and the inductance of the load inductors, it is possible to generate resonance with related parasitic capacitances at particular frequencies, such that value of the load inductors may be changed. This enables the invented mixer to work with selected frequencies according to the operation of the switches. In addition, a systematic methodology is proposed to implement the design of the invented dual-band mixer. The efficient design method is approved by a 2.4/5.2-GHz CMOS mixer implementation.