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:
Feb. 11, 2003
Filed:
Feb. 02, 2000
Applicant:
Inventors:
David George Rahn, Kanata, CA;
Marquis Christian Julien, Kinburn, CA;
Assignee:
SiGe Semiconductor Inc., Ottawa, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/30 ; H03G 3/10 ; H04L 2/949 ;
U.S. Cl.
CPC ...
H03F 1/30 ; H03G 3/10 ; H04L 2/949 ;
Abstract
A two stage amplifier for a portable or cellular phone is disclosed which is manufactured using a fast BiCMOS process suach as SiGe. A shunt circuit controlled by a switch is provided between a base of one of the amplifying transistors and a DC terminal to prevent it from operating in a Class B mode of operation when it is intended for the amplifier to be switched off.