Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio

Kohji Chiba, Toshio Nojima, Shigeru Tomisato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

The design and performance of the LSA-BC, a novel power amplifier, are presented. A linear amplifier with the high efficiency of a switching-mode saturation amplifier can be realized. A high-efficiency GaAs FET is roughly linearized by dynamically varying its drain DC voltage with a high-efficiency variable-output DC-DC converter. A negative envelope feedback is utilized to compensate for the residual. The circuit construction is simple enough for use in the portable subscriber units of a digital mobile radio system. A 1.5-GHz-band 1-W LSA-BC was constructed to determine its performance with 32-kb/s roll-off QPSK (quadrature phase-shift keying). As a result, a 40% total efficiency is achieved as well as a stable third-order intermodulation distortion of -50 dB to the signal level.

Original languageEnglish
Title of host publicationIEEE Global Telecommunications Conference and Exhibition
PublisherPubl by IEEE
Pages1958-1962
Number of pages5
Volume3
ISBN (Print)0879426322
Publication statusPublished - 1990
Externally publishedYes
EventIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3) - San Diego, CA, USA
Duration: Dec 2 1990Dec 5 1990

Other

OtherIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3)
CitySan Diego, CA, USA
Period12/2/9012/5/90

Fingerprint

Mobile radio systems
Intermodulation distortion
Quadrature phase shift keying
DC-DC converters
Field effect transistors
Power amplifiers
Feedback
Networks (circuits)
Electric potential

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Chiba, K., Nojima, T., & Tomisato, S. (1990). Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio. In IEEE Global Telecommunications Conference and Exhibition (Vol. 3, pp. 1958-1962). Publ by IEEE.

Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio. / Chiba, Kohji; Nojima, Toshio; Tomisato, Shigeru.

IEEE Global Telecommunications Conference and Exhibition. Vol. 3 Publ by IEEE, 1990. p. 1958-1962.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chiba, K, Nojima, T & Tomisato, S 1990, Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio. in IEEE Global Telecommunications Conference and Exhibition. vol. 3, Publ by IEEE, pp. 1958-1962, IEEE Global Telecommunications Conference & Exhibition Part 3 (of 3), San Diego, CA, USA, 12/2/90.
Chiba K, Nojima T, Tomisato S. Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio. In IEEE Global Telecommunications Conference and Exhibition. Vol. 3. Publ by IEEE. 1990. p. 1958-1962
Chiba, Kohji ; Nojima, Toshio ; Tomisato, Shigeru. / Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio. IEEE Global Telecommunications Conference and Exhibition. Vol. 3 Publ by IEEE, 1990. pp. 1958-1962
@inproceedings{e6c99f82ba274d979f3c680d8be518ee,
title = "Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio",
abstract = "The design and performance of the LSA-BC, a novel power amplifier, are presented. A linear amplifier with the high efficiency of a switching-mode saturation amplifier can be realized. A high-efficiency GaAs FET is roughly linearized by dynamically varying its drain DC voltage with a high-efficiency variable-output DC-DC converter. A negative envelope feedback is utilized to compensate for the residual. The circuit construction is simple enough for use in the portable subscriber units of a digital mobile radio system. A 1.5-GHz-band 1-W LSA-BC was constructed to determine its performance with 32-kb/s roll-off QPSK (quadrature phase-shift keying). As a result, a 40{\%} total efficiency is achieved as well as a stable third-order intermodulation distortion of -50 dB to the signal level.",
author = "Kohji Chiba and Toshio Nojima and Shigeru Tomisato",
year = "1990",
language = "English",
isbn = "0879426322",
volume = "3",
pages = "1958--1962",
booktitle = "IEEE Global Telecommunications Conference and Exhibition",
publisher = "Publ by IEEE",

}

TY - GEN

T1 - Linearized saturation amplifier with bidirectional control (LSA-BC) for digital mobile radio

AU - Chiba, Kohji

AU - Nojima, Toshio

AU - Tomisato, Shigeru

PY - 1990

Y1 - 1990

N2 - The design and performance of the LSA-BC, a novel power amplifier, are presented. A linear amplifier with the high efficiency of a switching-mode saturation amplifier can be realized. A high-efficiency GaAs FET is roughly linearized by dynamically varying its drain DC voltage with a high-efficiency variable-output DC-DC converter. A negative envelope feedback is utilized to compensate for the residual. The circuit construction is simple enough for use in the portable subscriber units of a digital mobile radio system. A 1.5-GHz-band 1-W LSA-BC was constructed to determine its performance with 32-kb/s roll-off QPSK (quadrature phase-shift keying). As a result, a 40% total efficiency is achieved as well as a stable third-order intermodulation distortion of -50 dB to the signal level.

AB - The design and performance of the LSA-BC, a novel power amplifier, are presented. A linear amplifier with the high efficiency of a switching-mode saturation amplifier can be realized. A high-efficiency GaAs FET is roughly linearized by dynamically varying its drain DC voltage with a high-efficiency variable-output DC-DC converter. A negative envelope feedback is utilized to compensate for the residual. The circuit construction is simple enough for use in the portable subscriber units of a digital mobile radio system. A 1.5-GHz-band 1-W LSA-BC was constructed to determine its performance with 32-kb/s roll-off QPSK (quadrature phase-shift keying). As a result, a 40% total efficiency is achieved as well as a stable third-order intermodulation distortion of -50 dB to the signal level.

UR - http://www.scopus.com/inward/record.url?scp=0025545142&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025545142&partnerID=8YFLogxK

M3 - Conference contribution

SN - 0879426322

VL - 3

SP - 1958

EP - 1962

BT - IEEE Global Telecommunications Conference and Exhibition

PB - Publ by IEEE

ER -