2009•Unpublished venueRequires access

Analysis of a multi-transistor interleaved Doherty amplifier

Kimberley W. Eccleston

Abstract

Interleaving of a distributed main amplifier with a distributed peaking amplifier forms a Doherty amplifier that is smaller than a conventional Doherty amplifier using these distributed amplifiers. We call this an interleaved Doherty amplifier. A theoretical analysis of a 4-FET interleaved Doherty amplifier shows load modulation occurs in both main amplifier FETs. Simulations of a 4-FET amplifier verified the theoretical analysis and showed that the interleaved Doherty amplifier to be as good as a conventional Doherty amplifier.

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Available abstract

Key concepts: Doherty amplifier, Direct-coupled amplifier, Linear amplifier, FET amplifier, Cascade amplifier, Amplifier, Current-feedback operational amplifier, RF power amplifier