2 bit R 2R DAC

2 bit Binary Weighted DAC Vo = -V_ref*(R_f/R)(b0/4 + b1/2) If R_f = R, then Vo = -V_ref*(b0/4 + b1/2) Here I am using V_ref = -4 V When b0 = 0, b1 = 0, Vo = 0V When b0 = 1, b1 = 0, Vo = 1 V When b0 = 0, b1 = 1, Vo = 2 V When b0 = 1, b1 = 1, Vo = 3 V