High Speed, Selective Multi-ADC (Analog to Digital Converters) to Computer Data Transfer Interface, for Nuclear Physics Experiments

摘要

A link connecting up to 15 Analog to Digital Converters (ADC) with a computer, through a direct memory access interface, is described. The interface decides which of the connected ADC participate in an event, and transfers the output-data from these to the computer, accompanied with a 2-byte word identifying the participating ADC. This data format can be recorded on tape without further transformations, and is easy to unfold at the off-line analysis. Data transfer is accomplished in less than a few microseconds, by the use of high speed TTL circuits.