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Dynamic range of superconducting quantum interference devices (SQUID) can be considerably increased by using a flux-locked-loop (FLL). The FLL noise is mainly determined by the amplifier noise used in the feedback loop. The use of a very low noise amplifier working at cryogenic temperature can lead to reach the limit of SQUID intrinsic noise (typically few(More)
In this paper, the analytical expressions of the buried double junction (BDJ) leakage currents are proposed. Associated to the photocurrents equations, the BDJ equivalent electrical circuit is deduced. However, in order to not limit this model to the photoconductive mode, an extension of the Ebers-Moll equivalent circuit is adopted. Next, the incremental AC(More)
This paper presents the design and implementation of second generation current conveyor CCII- in 0.35µm CMOS process. In the design, we intended to achieve very low output impedance of voltage buffer over wide frequency range, in order to comply with high requirements for laboratory instrumentation. Selected approach relies on the optimization of(More)
This paper reports a new digital circuit architecture to identify the resonant frequencies of a micro-resonant sensor. A generic and configurable model of micro-resonant sensors has been used to evaluate the efficiency of combining a pseudorandom excitation with a non-parametric harmonic retrieval algorithm all within a digital characterization circuit.(More)
Space missions require electronics providing high performances under extreme conditions. The most restrictive ones are cryogenics temperatures and radiations. Application Specific Integrated Circuit (ASIC) aims at reaching high performances, low weight and low power consumption. Therefore, simulation models available from industrial foundries are meant to(More)
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