Multi-octave 200 MHz to 20 GHz amplifier for extended range digital log video amplifier application

Author

Virdee, A.S. ; Virdee, B.S.

Author_Institution

Filtronic Components Ltd., Milton Keynes, UK

Volume

3

fYear

2000

fDate

11-16 June 2000

Firstpage

1329

Abstract

This paper presents the design of a low-cost multi-octave 200 MHz to 20 GHz compact single-stage feedback amplifier employing a PHEMT device for an extended range digital log video amplifier (ERDLVA) application. The amplifier design realized exhibited a gain level of 7.84/spl plusmn/0.5 dB, input/output VSWRs better than 10 dB, and noise figure less than 4 dB. Moreover, the amplifier exhibited a twofold power added efficiency improvement when compared to a conventional travelling wave amplifier design employing the same active devices.

Keywords

Feedback amplifiers; HEMT circuits; Hybrid integrated circuits; Microwave integrated circuits; Thin film circuits; Video amplifiers; Wideband amplifiers; 19.8 GHz; 200 MHz to 20 GHz; 7.84 dB; PHEMT device; broadband amplifiers; extended range digital log video amplifier application; low-cost design; multi-octave amplifier; single-stage feedback amplifier; Assembly; Bandwidth; Broadband amplifiers; Feedback amplifiers; Impedance matching; Negative feedback; Noise figure; PHEMTs; Resistors; Signal design;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest. 2000 IEEE MTT-S International

Conference_Location

Boston, MA, USA

ISSN

0149-645X

Print_ISBN

0-7803-5687-X

Type

conf

DOI

10.1109/MWSYM.2000.861765

Filename

861765