Edoardo Charbon

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| A methodology for the automatic synthesis of full-custom IC layout with analog constraints is presented. The methodology guarantees that all performance constraints are met when feasible, or otherwise infeasibil-ity is detected as soon as possible, thus providing a robust and eecient design environment. In the proposed approach, performance speciications(More)
The design and characterization of an imaging sensor based on single photon avalanche diodes is presented. The sensor was fully integrated in a 0.35μm CMOS technology. The core of the imager is an array of 4x112 pixels that independently and simultaneously detect the arrival time of photons with picosecond accuracy. A novel event-driven readout scheme(More)
We report on a new single-photon avalanche diode (SPAD) fabricated in a 130 nm CMOS imaging process. A novel circular structure combining shallow trench isolation (STI) and a passivation implant creates an effective guard ring against premature edge breakdown. Thanks to this guard ring, unprecedented levels of miniaturization may be achieved at no cost of(More)
——We report on the design and characterization of a novel time-resolved image sensor fabricated in a 130 nm CMOS process. Each pixel within the 32 32 pixel array contains a low-noise single-photon detector and a high-precision time-to-digital converter (TDC). The 10-bit TDC exhibits a timing resolution of 119 ps with a timing uniformity across the entire(More)
Photon counting is useful in space-based imagers wherever quantitative lightintensity evaluation is necessary. Various types of radiation, from cosmic rays to high-energy proton beams to gamma radiation, have an effect on the functionality and accuracy of imagers and the literature is extensive [1,2]. Techniques to maximize sensor tolerance have also been(More)
Image sensors capable of resolving the time-of-arrival (ToA) of individual photons with high resolution are needed in several applications, such as fluorescence lifetime imaging microscopy (FLIM), Förster resonance energy transfer (FRET), optical rangefinding, and positron emission tomography. In FRET, for example, typical fluorescence lifetime is of the(More)
Techniques are presented to compactly represent substrate noise currents injected by digital networks. Using device-level simulation, every gate in a given library is modeled by means of the signal waveform it injects into the substrate, depending on its input transition scheme. For a given sequence of input vectors, the switching activity of every node in(More)
We propose a new image device called gigavision camera. The main differences between a conventional and a gigavision camera are that the pixels of the gigavision camera are binary and orders of magnitude smaller. A gigavision camera can be built using standard memory chip technology, where each memory bit is designed to be light sensitive. A conventional(More)
<italic>The problem of designing complex analog circuits is attacke dusing a hier archic altop-down, constr aint-driven design methodolo gy. In this methodolo gy, constraints are prop agate dautomatically from high-level specific ationsto physic aldesign through a sequence of gradual transformations. Constraint tr ansformation is a critic al step in the(More)