Digitally assisted feedforward power amplifier

Author

Pinckley, D.T. ; Chu, T. ; McBeath, S.M.

Author_Institution

Motorola Labs, Fort Worth, TX, USA

Volume

2

fYear

2002

fDate

4-7 Aug. 2002

Abstract

Digitally assisted feedforward (DAFF) is a digital enhancement to a feedforward power amplifier (PA). In the standard feedforward configuration, both on-channel and off-channel distortion is suppressed. In the DAFF configuration, a special reference signal is generated such that only the off-channel distortion is suppressed. This process greatly reduces the peak-to-average power in the error amplifier, which facilitates an increase in output power for the entire amplification circuit. Additionally, one can suppress on-channel distortion to varying degrees, which simply reduces, to varying degrees, the improvement in output power.

Keywords

MMIC power amplifiers; UHF integrated circuits; UHF power amplifiers; distortion; feedforward; DAFF; digital enhancement; digitally assisted feedforward power amplifier; error amplifier; off-channel distortion; on-channel distortion; output power; peak-to-average power; reference signal; standard feedforward configuration; Baseband; Circuits; Error correction; Filters; Frequency; Nonlinear distortion; Peak to average power ratio; Power amplifiers; Power generation; Signal generators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on

Print_ISBN

0-7803-7523-8

Type

conf

DOI

10.1109/MWSCAS.2002.1186898

Filename

1186898