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:
May. 23, 2006
Filed:
Jun. 03, 2004
Applicants:
Bingxue Shi, Beijing, CN;
Baoyong Chi, Beijing, CN;
Inventors:
Bingxue Shi, Beijing, CN;
Baoyong Chi, Beijing, CN;
Assignee:
Winbond Electronics Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 7/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
A down-converter and a testing device for the down-converter are provided. The down-converter implements a Class-AB single-end input, differential output double balanced mixer structure. By introducing an on-chip bias loop, it significantly improves the symmetry and linearity of the mixer. The down-converter on-chip implements an input impedance match circuit and an open-drain output stage. By optimizing the circuit structure and each device, it achieves the objectives of a high conversion gain, high linearity, and low noise coefficient.