Enhanced radiation hardness and faster front ends for the beetle readout chip -н van Bakel, N, van den Brand, J, Verkooijen, H, Bauer, C, Baumeister, D, Hofmann, N, Knopfle, K, Lochner, S, Schmelling, M, Sexauer, E, Feuerstack-Raible, M, Trunk, U, Harnew, N, Smale, N