Components for Superconductor Digital-RF Predistorter

Author

Sahu, Anubhav ; Filippov, Timur V. ; Gupta, Deepnarayan

Author_Institution

Hypres, Inc., Elmsford, NY, USA

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

585

Lastpage

589

Abstract

HYPRES is developing a superconductor digital-RF predistorter for direct linearization of radio frequency (RF) power amplifiers. The predistorter utilizes proportional (P), squared integral (I) and differential (D) corrections. We report progress in the proportional component implementation. We designed, fabricated and tested a 4-to-16 decoder, a 16-to-6 memory matrix and a test pattern generator integrated on a 10 mm times 10 mm chip. We also designed a pipelined differentiator, the critical element of the differential component, and its combination with the decoder. The correct operation of a resettable counter to implement the integral predistorter function is reported. The design issues of the complete superconductor PID predistorter are discussed in brief.

Keywords

differentiating circuits; digital circuits; linearisation techniques; power amplifiers; radiofrequency amplifiers; superconducting devices; HYPRES; RF power amplifiers; decoder; direct linearization; integral predistorter function; pipelined differentiator; proportional component implementation; radio frequency power amplifiers; resettable counter; superconductor PID predistorter; superconductor digital-RF predistorter; test pattern generator; Differentiator; RSFQ; digital-RF; predistorter;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018061

Filename

5153005