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. 08, 2006
Filed:
May. 16, 2003
Jean-françois Debroux, St Etienne de St Geoirs, FR;
Jean-François Debroux, St Etienne de St Geoirs, FR;
ATMEL Grenoble S.A., Saint Egreve, FR;
Abstract
The invention concerns an integrated circuit amplifier designed to supply an amplified signal at a power of a few hundreds of milliwatts at frequencies from one to several Gigahertz. The final stage of the amplifier comprises two signal amplification input points E and E' receiving in differential mode a signal to be amplified, and four main transistors of the same type of conductivity, each having a base, an emitter and a collector, including a first transistor or output transistor mounted in common emitter configuration, whereof the collector is linked to the output of the integrated circuit, a second transistor mounted in voltage follower configuration between the point E and the base of the output transistor, a third transistor mounted in common emitter configuration, having its collector linked to the base of the output transistor, a fourth transistor mounted in voltage follower configuration having its base linked to the point E′ and its emitter linked to the base of the third transistor, the circuit also comprising a first current source linked to the base of the first transistor and a second current source linked to the base of the third transistor and to the emitter of the fourth transistor.