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Centurelli, F. ; Luzzi, Raimondo ; Marietti, Piero ; Scotti, Giuseppe ; Tommasino, Pasquale ; Trifiletti, Alessandro
(2005)
An active balun for high-CMRR IC design.
In: Gallium Arsenide applications symposium. GAAS 2005, 3-7 ottobre 2005, Parigi.
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Abstract
A circuit topology that provides large bandwidth single-ended to differential conversion is presented. The proposed cell is based on a differential pair where feedback on common mode signal provides about 6 dB conversion gain increase, together with attenuation of common mode signal. Small-signal characterisation is presented, based on a block decomposition of the cell. Measurements on a SiGe test IC show more than 5 dB of gain improvement with respect to a simple differential pair.
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