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This study proposes an energy detector for a noncoherent impulse-radio UWB receiver, designed in a 0.18-mum CMOS technology. The squaring functionality is realized exploiting the quadratic characteristic of MOS transistors, and the deviation from such a characteristic due to short channel effects and device mismatch is carefully considered in the paper. The squared signal is integrated using a Gm-C...
The design and test results of a three-metal, double-poly, 0.35 μm; CMOS analog turbo decoder for the rate-1/3, block length 40, UMTS turbo code, are presented. A discrete-time model of analog decoding networks is also presented. This model can be used as a tool to both predict chip performance in a short time and give design guidelines for complex decoders, for which circuit-level simulations are...
A low-power front-end for a pacemaker atrial sensing channel based on peak detection is presented. The very tight system specifications in terms of power consumption and output noise, the need to operate with a supply voltage decreasing from 2.8 V to 2 V during the battery lifetime, and additional functionalities with respect to standard front-ends, like gain programmability and early sensing, make...
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