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. 28, 2007
Filed:
Nov. 25, 2003
Applicant:
Sifen Luo, Potomac, MD (US);
Inventor:
Sifen Luo, Potomac, MD (US);
Assignee:
NXP B.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
An amplifier circuit () includes an amplifying transistor (QØ) and a dc bias circuit () for biasing the amplifier transistor (QØ) to obtain a conduction angle of at least about 180°. The dc bias circuit () includes a self-bias boosting circuit which has a Wilson current-mirror (Q, Q, Q) integrated with a cascode current-mirror circuit (Q, Q) to form an extended Wilson current-mirror circuit (Q-Q) having an output coupled to a control terminal of the amplifying transistor (QØ) by a resistor (R), and a capacitor (C) coupled from the extended Wilson current-mirror circuit (Q-Q) to a common terminal (Gnd).