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US 9,853,604 B2Granted
Amplifier circuit and method
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorRichard Hellberg
Life of this patent
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AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorRichard Hellberg
Estimating the term…
An amplifier arrangement comprises N amplifier stages, wherein N is an integer equal or greater than four. The amplifier arrangement comprises a cascade of quarter wavelength transmission lines coupled between an output of an amplifier of a first amplifier stage and an output node of the amplifier arrangement, wherein the cascade comprises N−1 quarter wavelength transmission lines. An amplifier of the Nth stage is coupled to the output node, and remaining amplifiers between the first and Nth stages coupled to successive junctions in the cascade of quarter wavelength transmission lines. The amplifier arrangement is further configured such that the amplifier of the Nth stage is coupled to the output node via a connecting quarter wavelength transmission line, and whereby each of the remaining amplifiers of the N−2 stages closest to the output node is coupled by a respective connecting quarter wavelength transmission line to a respective junction of the cascade of quarter wavelength transmission lines.
An amplifier arrangement comprising N amplifier stages, wherein N is an integer equal or greater than four;
A method of improving the efficiency of an amplifier arrangement comprising N amplifier stages, wherein N is an integer equal or greater than four;
Dependencies are inferred from the claim text.