128-channel “general purpose” charge sensitive amplifier. Each channel features buffered preamplifiers, a shaper with sample/hold, multiplexed analogue readout and calibration facilities. In addition, each channel has a “fast” shaper that gives a trigger signal. The analogue value and the address of the triggering channels are read out. The ASIC can output all channels, only triggered, or triggered channels with neighbors. Each channel has input leakage current compensation automatically adjusted in each preamplifier channel. This ASIC can be used in parallel with many ASICs, sharing all output lines and some control lines.

Keywords: General purpose read-out ASIC, Positron emission tomography (PET)