Patent · US Expired

High-frequency power amplifier

US6281755A · kind A · utility

20Cited by

9References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Peter Feld · Nuremberg, DE
Horst Kroeckel · Bamberg, DE
Markus Vester · Koblenzer Straße, DE

Key dates

Filing date	Dec 28, 1998
Grant date	Aug 28, 2001
Priority date	—
Expiry date	Dec 28, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2200/111
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A high-frequency power amplifier for feeding an antenna of a nuclear magnetic resonance tomography apparatus has at least one amplifier stage that can emit a maximum output power within a first frequency band. Circuitry for frequency-dependently altering the maximum output power is connected to the amplifier stage, whereby the maximum output power within a second frequency band, that is higher than the first frequency band is higher than within the first frequency band.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.