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—The constraints on the design of CMOS operational amplifiers with rail-to-rail input range for extremely low supply voltage operation, are addressed. Two design approaches for amplifiers based on complementary input differential pairs and a single input pair, respectively, are presented. The first realizes a feedforward action to accommodate the(More)
This paper introduces a CMOS amplifier input stage with extended input common-mode voltage range, suitable for operation in extremely low-voltage environments. The approach is based on a bulk-driven input differential pair, in which the gain and the gain-bandwidth product are enhanced by means of a partial positive feedback loop. The bulk-driven input(More)
Physical unclonable function (PUF) leverages the immensely complex and irreproducible nature of physical structures to achieve device authentication and secret information storage. To enhance the security and robustness of conventional PUFs, reconfigurable physical unclonable functions (RPUFs) with dynamically refreshable challenge-response pairs (CRPs)(More)
— This paper presents a comparison between two of the most popular charge pump structures: the Dickson charge pump and the cascade of voltage doublers. The comparison has been carried out considering the power efficiency as the main parameter of interest. The discussion is supported by theoretical analysis and experimental results. To compare the two(More)
This paper presents program pulse characterization in an 8-Mb BJT-selected Phase-Change Memory test chip. Experimental results of the impact of the bit-line resistance over programming pulses efficiency are provided. Furthermore, in order to compensate for spreads in cell physical parameters in an array portion, a non-conventional staircase-down program(More)