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:
Mar. 04, 2003
Filed:
May. 23, 2001
Johann-Peter Forstner, Steinhöring, DE;
Franz-Xaver Sinnesbichler, Thansau, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A circuit configuration for actuating a power amplifier transistor is described, which is intended to ensure that the power consumption is as low as possible while having a variable output power. Such a circuit is particularly suitable for amplifiers in mobile telephones. In particular, a circuit configuration is described which controls at least two different operating points for at least two different output power ranges. At a first operating point, the quiescent current in the power amplifier transistor is controlled by a first balanced circuit having a temperature-compensating active feedback circuit. At a second operating point, the quiescent current in the power amplifier transistor is controlled by a second balanced circuit, having a second feedback circuit. A third operating range is used in saturation mode, which ensures maximum power efficiency with the maximum output power, although this results in the gain being only partially linear.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile