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:
May. 11, 2004
Filed:
Jun. 07, 2002
Arne Rydin, Fjärdhundra, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
An amplifier system ( ) for radio frequency signals comprises a combination of a phase and gain adjuster ( ) and a first amplifier ( ) which receives an input signal and generates a first amplified signal having a gain adjusted in accordance with a gain of the phase and gain adjuster. A main amplifier ( ) receives the first amplified signal and generates a second amplified signal. A first controller ( ) uses a signal derived from the second amplified signal to generate a first control signal. The first control signal is applied to the phase and gain adjuster to control the gain of the phase and gain adjuster. A second controller ( ) is connected to receive the first control signal and to generate a second control signal which is applied to the first amplifier. The second control signal is generated to control the first control signal and thereby control noise of the amplifier system. With the second control signal being used to control the first control signal, the phase and gain adjuster ( ) can adjust the adjusted signal to make adjustments for a first type of gain variation of the amplifier system.