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:
Apr. 03, 2012
Filed:
Mar. 14, 2009
Joerg Schroth, Ulm, DE;
Rolf Reber, Ulm, DE;
Rainer Rittmeyer, Ulm, DE;
Hardy Sledzik, Blaustein, DE;
Joerg Schroth, Ulm, DE;
Rolf Reber, Ulm, DE;
Rainer Rittmeyer, Ulm, DE;
Hardy Sledzik, Blaustein, DE;
EADS Deutschland GmbH, Ottobrunn, DE;
Abstract
In a method and apparatus for compensating for gain changes in an amplifier circuit comprising radio-frequency modules and attenuation elements, a radio-frequency module is driven with a first temperature-dependent monitoring voltage U(T), and an attenuation element with a second temperature-dependent monitoring voltage U(T). The first temperature-dependent monitoring voltage U(T) is produced by applying a temperature dependency to an individual monitoring voltage U, which is predetermined for a predetermined temperature for a radio-frequency module, in order to set the optimum operating point of the radio-frequency module. The second temperature-dependent monitoring voltage U(T) is produced by applying a temperature dependency to a predetermined monitoring voltage Ufor the attenuation element. The monitoring voltage Uis determined in an iteration method, such that the output power of the amplifier circuit reaches a predeterminable level at a constant input power. Memory devices are provided for storing values for producing monitoring voltages for the radio-frequency modules and attenuation elements.