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We propose behavioral time-domain modeling for a Sigma-Delta Modulator (ΣΔM) to sense photocurrent in a CMOS Image Sensor (CIS). The model starts from transfer function for first-order single-bit ΣΔM in discrete-time, and then adds noise sources and nonlinearities by introducing noise floor and harmonic distortion, which determine system performance. The results were compared with the measurements...
Simulation software is a fundamental tool that should be used when designing systems dealing with electro-thermal interaction, for instance. Nevertheless, there exist some inconveniences that limit and make specific software hard to use in this task. On one side, it may require a large processing hardware capacity, and on the other, simulation time increases substantially if the model complexity and...
In this paper we deal with the synchronization of the Colpitts oscillator. The synchronization problem for chaotic systems is treated as an observation problem, some results based on a differential algebraic approach are used in order to determine observability with the measurements from the system. The strategy consists of proposing a slave system (observer) which tends to follow asymptotically the...
It is well known that software is a powerful tool for circuit simulation and analysis, conceived to verify electronic systems. However, some kind of analyses may not be completed with only one software suit, due to the nature of the system under test. In this work, a technique is presented to overcome some limitations that are present, in particular, when a simulation has to be done with a system...
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