AtoD

A to D

Here is an idea for a one bit A to D converter.

  Vinput --- [ one bit AtoD ] --- Voutput

If the input is between Vmax and Vmax/2 subtract Vmax/2

  Vbit = Vmax * ( Vinput > Vmax/2 )

  Voutput = ( Vin - Vbit ) * 2

These one bit AtoD converters can be chained together until tolerences break it.