The 13500 channels of the NA48 liquid-krypton electromagnetic calorimeter r
eadout electronics were put into operation in 1997. The digitizer electroni
cs employs a new gain switching technique that expands the dynamic range of
a standard 10-bit ADC to 14 bits at 40 MHz sampling rate employing a custo
m-developed integrated circuit (KRYPTON). The KRYPTON has been fabricated i
n 1.2 mu m BiCMOS technology and was successfully developed together with i
ndustry on a short timescale. The performance and the experience from the f
irst year of the operation of the liquid-krypton calorimeter electronics wi
ll also be briefly discussed. (C) 1998 Elsevier Science B.V. All rights res
erved.