In the following circuit, the comparators output is logic “1” if V₁ > V₂ and is logic “0” otherwise. The D / A conversion is done as per the relation V_DAC = $\sum_{n=0}^3 2^{n-1}b_n$ Volts, where b₃ (MSB), b₁, b₂ and b₀ (LSB) are the counter outputs. The counter starts from the clear state.

The stable reading of the LED displays is