Novel analog to digital converters using voltage inverter switches. I. Reference circuits

Novel analog to digital converter (ADC) circuits that incorporate voltage inverter switches (VISs) are described. In the first part the principles of voltage inversion are described. It is shown how these circuits can be used to construct very accurate divide-by-two reference circuits. Due to the ability of the VIS circuits to compensate for parasitic losses during the process of capacitor charge redistribution, these reference circuits are superior to previous designs. Three different VIS reference circuits are presented. Theoretical analyses are confirmed with computer simulations and measured results from experimental circuits.>