to the stage 30 the most significant bit not shown of the comparator 10 receives an input to its divide by 2 current source from a current source also not shown the input to divide by 2 current source 38 is also supplied on line 62 as an input to current switch 64 similarly the input to divide by 2 current source 36 on line 40 is also supplied on line 66 as an input to current switch 68 the input to divide by 2 current source 34 on line 42 is also supplied on line 70 as an input to current switch 72 the input to divide by 2 current source 32 on line 44 is also supplied on line 74 as an input to current switch 76 an analog signal to be converted to digital form in the converter 10 is supplied on line 78 as an input to buffer amplifier 80 the output of buffer amplifier 80 is supplied on line 82 as an input to voltage to current converter 84 the voltage to current converter 84 supplies equal currents on lines 86 88 90 and 92 respectively as inputs to the comparators 48 56 58 and 60 outputs from the comparators 48 56 58 and 60 are respectively supplied on lines 94 96 98 and 100 to and gates 102 104 106 and 108 the other input to and gates.