Analog-to-digital converter with interpolation

A converter comprising:

• a first comparator having a first input coupled to a first reference voltage, a second input coupled to an analog signal and an output;
• a second comparator having a first input coupled to a second reference input, a second input coupled to the analog signal and an output;
• a third comparator having a first input coupled to the output of the first comparator, a second input coupled to the output of the second comparator and an output;
• a signal processor connected to the output of the third comparator, the signal processor operable to provide a converted value of the analog signal;
• and
• wherein the converted value is greater than half of a sum of the first reference voltage and the second reference voltage when the output of the third comparator is low and less than half of the sum of the first reference voltage and the second reference voltage when the output of the third comparator is high.