Ultra Wide Band Variable Gain Amplifier for V-band Transceivers

Conference: GeMiC 2014 - German Microwave Conference
03/10/2014 - 03/12/2014 at Aachen, Germany

Proceedings: ITG-Fb. 246: GeMiC 2014

Pages: 4Language: englishTyp: PDF

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Aimone, Alessandro; Malignaggi, Andrea; Hamidian, Amin; Boeck, Georg (Microwave Engineering Lab, Berlin Institute of Technology, Berlin, Germany)
Boeck, Georg (Ferdinand-Braun-Institut, Leibniz-Institut fuer Hoechstfrequenztechnik (FBH), Berlin, Germany)

This paper presents a wideband variable-gain amplifier implemented in a standard 90 nm CMOS process. The variable gain is obtained thanks to a variable resistive network whereas the broad bandwidth is achieved thanks to an active feedback chain and a cascade topology. The VGA has been measured and shows a gain which can be set between -2 and 25.5 dB in a continuous way and a 3 dB bandwidth larger than 4.9 GHz for all gain levels. The overall occupied chip area is 0.43 mm2 pad included, with an active area of 0.14 mm2 only.