Front End Processing for a 100 MHz Flash-ADC-System
An intelligent interface for readout of a high speed (100 MHz), multichannel Flash-ADC System [1] is described. 3072 FADC channels are controlled and read by a system of 34 microprocessors M68000 placed at two different hierarchical levels. In addition to the readout itself, the processors perform a detailed pulse shape analysis neccessary for a compact and manageable data format. The purpose of the system is to exploit the good double track separation and time resolution provided by Flash-ADCs in conjunction with large drift chamber detectors such as JADE at PETRA [2] and OPAL at LEP [3]. Details of the system presently being installed at JADE are reviewed.