A 32 Channels Charge Integrating ADC Based on Digital Signal Integration

A digital charge integrator with programmable gate width and range has been designed for use in the KLOE drift chamber front-end chain. The system has a resolution of $9$ bits ranging from $600$ $fC/count$ up to $\approx 76$ $pC$ and integration time ranging from $100$ $ns$ to about $13$ $\mu sec$. Thirty two channels have been packaged in a single VME 9U board