Un sistema per la manipolazione di dati analogici

A system for handling analog data and, in particular, biomedical data, was developed and realized at the Istituto di Elaborazione dell'Informazione of the National Council of Research (CNR), Pisa. The system is a hybrid, special purpose, fixed program computer which performs A/D conversion and analog and digital operations. The system handles signals from d.c. up to 5 kHz, and accept repetition rate of input spike-wise signals up to 4 kHz. The analog operations that can be performed are: linear amplification, non linear amplification and band filtering. The digital ones, are: averaging, time and amplitude hystograms. When the system operates as A/D converter, the digital data are stored on a digital magnetic tape without interrupting the sampling process, by using a magnetic core memory as a buffer. Handling spike-wise signals, both amplitude and time coordinate are converted and stored in digital form.