Analog front ends, asynchronous MAPS readout, system surrogates, timing, and radiation-aware implementation.
Monolithic active-pixel sensors combine charge collection, analog front ends, asynchronous event signalling, and digital periphery in the same technology. The research program asks how circuit behaviour, grouping, timing, and bandwidth interact before a hit becomes usable detector data.
MALTA-2 and MALTA-3 front-end work connects detector-level requirements to low-voltage gain, threshold and calibration behaviour, device variability, layout extraction, timing, and measurement. TPSCo 65 nm implementation questions add process and parasitic constraints that cannot be resolved at the behavioural-model level alone.
When events arrive without a global frame clock, grouping and merging create characteristic loss mechanisms. The program studies OR-merging loss, deterministic encoding cliffs, crossover rules, grouping, buffering, merger throughput, link allocation, and layout-aware delay. Analytic surrogates are calibrated against detailed simulation so architectural exploration remains tractable without losing the observable event-survival behaviour.
Adrian Sibiga's co-supervised work with Thomas Koffas connects low-voltage detector requirements to analog front-end architecture, calibration, layout extraction, timing, and measurement for MALTA-2 and MALTA-3 contexts.
Analytic and simulation-backed surrogates study how grouping, OR merging, encoding cliffs, buffering, merger delay, and link allocation affect hit survival in bandwidth-limited monolithic active-pixel-sensor readout.
An earlier differential active-pixel-sensor publication provides historical continuity for the present return to monolithic sensors, while the contemporary program adds asynchronous event flow, layout-aware timing, and radiation-relevant CMOS constraints.
Radiation-aware work considers process choice, device and layout effects, variability, fault tolerance, asynchronous operation, and the evidence needed to support stronger claims. Design for a radiation environment, simulated tolerance, irradiated behaviour, and formally qualified radiation-hard hardware are different levels of evidence and are reported separately.