A floating-gate MOSFET D/A converter

The inherent capability of floating-gate MOS transistors, of performing addition of weighted input signals, can be exploited to realize single D/A converter architectures. A single floating-gate MOS device can be used as a D/A converter. Its precision for large number of bits is, however, poor. A parallel D/A architecture using floating-gate MOS transistors is proposed. This architecture is very simple but provides better precision than the single transistor D/A converter. An 8-bit D/A converter is presented and simulated to demonstrate the functionality.