Title :
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
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;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.861765
