摘要
Based on AGET(ASIC for Generic Electronics for TPC)chip and TCA(Micro Telecommunication Computing Architecture)crate,a 256-channel readout system for Time Projection Chambers(TPC)has been build.One chip of AGET contains 64 channels,each channel includes a CSA(Charge Sensitive Preamplifier),an analog filter,a discriminator and a 512-sample analog memory constructed based on a SCA(Switched Capacitor Array).64 channels receive signals directly from each PAD of TPC.4 AGET chips are soldered on each AsAd(ASIC support&Analog-Digital conversion)card and matched with 4 chips of 4-channel 12-bit ADCs.The digital outputs of the 4 ADCs are transmitted via 4 pairs of differential lines with a maximum transmission speed of 1.2 Gbit/s to the R-Cobo(Reduced Concentration Board).
