A NOVEL SWITCHED-CAPACITOR BASED FIELD-PROGRAMMABLE ANALOG ARRAY ARCHITECTURE

A novel field-programmable analog array (FPAA) architecture based on s witched-capacitor techniques is proposed. Each configurable analog blo ck (CAB) in the proposed architecture is an opamp with feedback switch es which are controlled by configuration bits. Interconnection network s are used to connect programmable capacitor arrays (PCAs) and the CAB s. The routing switches in the interconnection networks not only funct ion as interconnection elements but also switches for the charge trans fer required in switched-capacitor circuits. This scheme minimizes the number of connecting switches between CABs and PCAs, thereby, it redu ces the settling time of the resultant SC circuits and thus achieving high speed operation. The architecture is highly flexible and provides for the implementation of various A/D and D/A converters when the FPA A is connected with external digital circuits or field-programmable ga te arrays (FPGAs).