A variable gain MMIC amplifier

Anowar Masud
Chalmers University of Technology, Microwave Electronics Laboratory, Sweden

Mattias Ferndahl
Chalmers University of Technology, Microwave Electronics Laboratory, Sweden

Herbert Zirath
Chalmers University of Technology, Microwave Electronics Laboratory, Sweden \ Ericsson AB, Microwave and High Speed Research Center, Sweden

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Ingår i: GigaHertz 2003. Proceedings from the Seventh Symposium

Linköping Electronic Conference Proceedings 8:46, s.

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Publicerad: 2003-11-06


ISSN: 1650-3686 (tryckt), 1650-3740 (online)


A variable gain single ended MMIC amplifier is demonstrated. A maximum gain of 13 dB with a control range of 13 dB is obtained at 2.5 GHz. The -3 dB bandwidth is 5 GHz. The circuit consists of a cascode input stage with an active load followed by a source follower for impedance transformation. A GaAs pseudomorphic HEMT technology is used for the implementation. The active circuit area is less than 1 mm2.


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