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This paper presents an auto tuning system using a variable synchronous switched capacitor for controlling the resonant frequency of a half bridge voltage mode resonant converter. This original tuning topology does not need the addition of any bulky magnetic and consequently is naturally compatible with MRI (Magnetic Resonance Imaging) equipments.
In this paper, an automatic gain control amplifier (AGC) is proposed. The proposed AGC aims at a large input and output swing with a rapid tracking capacity. Moreover, the proposed AGC has a quite simple structure, which is very important for High intensity focused ultrasound (HIFU) applications in which an array of identical circuits must be used. The designed circuit was simulated in a CMOS 0.35μm...
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