Investigating programmable floating-gate digital-to-analog converter as single element or element arrays

This approach analogous to the classical scaled transistor DAC techniques, where we scale our transistors by programming each transistor´s floating-gate charge instead of adjusting W/L ratios. The programable DAC allows great accuracy by eliminating any device mismatch that would otherwise impact a DACs performance. We investigate the feasibility of this approach by making experimental measurements from fabricated floating-gate DAC circuits. The resulting structure requires minimal IC area, since it only uses a minimum or nearly minimum size transistor and a capacitor per bit of resolution.