Programmable Conductance Switches for FPAAs

Floating gate transistors make excellent switches for large-scale field-programmable analog arrays (FPAAs). In addition to simple "on" and "off" connections, they can be used as computational elements within synthesized circuits. However, the programmable range of these computational elements as well as the quality of an "on" switch can be limited by the particular switch topology and programming methods. To extend the useful range of floating gate switches, programming method improvements and indirectly programmed topologies are explored and demonstrated