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:
Nov. 16, 1999
Filed:
Jul. 28, 1998
Applicant:
Inventor:
Gerhard Lohninger, Munich, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ;
U.S. Cl.
CPC ...
330290 ; 330296 ;
Abstract
A transistor amplifier stage, in particular an RF amplifier stage with an npn amplifier transistor, which is coupled with its base to an alternating voltage input terminal, with its emitter to a fixed potential, and with its collector to an alternating voltage output terminal. An active operating point stabilization unit with a first and a second pnp transistor is provided between a direct voltage input terminal and the base of the npn amplifier transistor.