Charge transfer device transversal filter - has several input stages switched in parallel and single output stage switchable to filters

摘要

The transversal filter allows several input signals to pass through simultaneously without mutual interference. There is therefore an economy on semiconductor surface. The charge transfer device is formed on a doped semiconductor body and comprises several input stages switched in parallel and coupled to different charge transfer elements. There is a single output stage. The input stages are coupled to a number of charge transfer elements as well as charge transfer elements offset w.r.t. each other. These are collected together in a group and connected to a common group input. Filter inputs can be switched to the group inputs via input switches. The output stage can be switched to each filter output via output switches.