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. 18, 2009
Filed:
Jul. 18, 2006
Jen-chung Chang, Taoyuar County, TW;
Chia-jung Hsu, Hsinchu, TW;
Shey-shi LU, Taipei, TW;
Hsiao-chin Chen, Hsinchu, TW;
Tzu-chao Lin, Kaohsiung, TW;
Jen-Chung Chang, Taoyuar County, TW;
Chia-Jung Hsu, Hsinchu, TW;
Shey-Shi Lu, Taipei, TW;
Hsiao-Chin Chen, Hsinchu, TW;
Tzu-Chao Lin, Kaohsiung, TW;
United Microelectronics Corp., Hsinchu, TW;
National Taiwan University, Taipei, TW;
Abstract
A sub-harmonic mixer and a down converter with the sub-harmonic mixer are provided. The sub-harmonic mixer includes a differential amplifying unit, a current buffer unit, and a switching unit. The differential amplifying unit is used to amplify a radio frequency (RF) signal and employs a first resonance circuit to force a leakage signal to flow to a first voltage. The current buffer unit is used to amplify the gain of an output signal of the differential amplifying unit and employs a second resonance circuit to force the leakage signal to flow to a second voltage. Finally, the switching unit switches an output signal of the current buffer unit into a base band signal.