Broadband reciprocal active balun structure

Details Broadband reciprocal active balun structure Broadband reciprocal active balun structure

2008-11-10

2010-06-15

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including balanced to unbalanced circuits and vice versa

C330S054000, C330S053000

Reexamination Certificate

active

07737786

ABSTRACT:
The present invention relates to the field of electronic devices known as baluns. It concerns an active balun which is broadband and reciprocal. Embodiments of the invention integrate an active splitter balun with an active combiner balun so as to form three transmission lines. A first active coupling is provided between the first and second transmission lines and a second active coupling is provided between the first and third transmission lines. The active couplings are provided by means of amplifier cells distributed along the transmission lines. Embodiments of the invention have configurable means for polarizing the different amplifier cells so as to create a specific coupling direction between the various transmission lines. The device according to the invention can be applied in the field of broadband mixers which are used, notably, in radio transmission and reception circuits.

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