A versatile and reconfigurable ASIC is presented, which implements two different concepts of low level trigger (L0) for Cherenkov telescopes: the Majority trigger (sum of discriminated inputs) and the Sum trigger concept (analogue clipped sum of inputs). Up to 7 input signals can be processed following one or both of the previous trigger concepts. Each differential pair output of the discriminator is also available as a LVDS output. Differential circuitry using local feedback allows the ASIC to achieve high speed (500 MHz) while maintaining good linearity in a 1 Vpp range. Experimental results are presented. A number of prototype camera designs of the Cherenkov Telescope Array (CTA) project will use this ASIC.
@article{arxiv.1611.09713,
title = {Reconfigurable ASIC for a Low Level Trigger System in Cherenkov Telescope Cameras},
author = {David Gascon and Juan Abel Barrio and Oscar Blanch and Joan Boix and Eric Delagnes and Carlos Delgado and Lluís Freixas and Fabrice Guilloux and Rubén López-Coto and Scott Griffiths and Gustavo Martínez and Oscar Martínez and Andreu Sanuy and Luis Ángel Tejedor},
journal= {arXiv preprint arXiv:1611.09713},
year = {2016}
}