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:
Oct. 23, 2007
Filed:
Dec. 05, 2003
Heinrich Schemmann, Villingen-Schwenningen, DE;
Mehmet Ipek, Villingen-Schwenningen, DE;
Sabine Roth, Mönchweiler, DE;
Heinrich Schemmann, Villingen-Schwenningen, DE;
Mehmet Ipek, Villingen-Schwenningen, DE;
Sabine Roth, Mönchweiler, DE;
Thomson Licensing, Boulogne-Billancourt, FR;
Abstract
A variable-gain RF amplifier arrangement whose input impedance is essentially independent of the selected gain is proposed, which has a large number of selectable elementary amplifiers, with an input signal being scaled and the input impedance being set to be the same by means of switchable current limiting elements upstream of the elementary amplifiers, which are associated with the elementary amplifiers. The circuit also has a low noise level, which is largely independent of the selected gain, and good linearity. A broadcast radio receiver as well as a receiver for receiving data signals using an amplifier according to the invention are also proposed.