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This paper addresses the analysis and design of an upconversion mixer suitable for a multi-band analog interface for CMOS SOCs. This block must relocate an input signal from 3 different frequency bands (FM, VHF/UHF and CDMA/GSM) to a fixed IF frequency of 1.4 GHz. The mixer architecture is based on a Gilbert Cell and multi-tanh linearization technique, providing the required gain and linearity for...
This paper addresses the design of a track-and-latch switched analog comparator in a pre-diffused array of digital - i.e. minimum length - transistors. The mapping of each original single transistor of the circuit into an equivalent trapezoidal association of digital transistors (TAT) is analyzed. This analog module was analyzed, designed and prototyped in AMS 0.35 mum CMOS technology. Experimental...
The goal of this paper is to present a transistor optimization methodology for analog integrated CMOS circuits, based on the physics-based gm/ID characteristics provided by the ACM compact MOS model. This methodology is implemented in a design tool, exploiting all the design space with the use of simulated annealing optimization process. A single technology dependent curve and accurate expressions...
This work presents an analysis of a new type of composite transistor specially suited for the design of analog integrated circuits: the T-shape association of transistors. This association is composed by nonequal size unit transistors arranged in a series-parallel array with common gate, which can substitute the conventional rectangular transistors with advantages in some aspects, such as better high-frequency...
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