DAC_R-2R Ladder_ 4 bits

This circuit demonstares a digital to analog converter (DAC) using R-2R ladder network. The Logic Levels have been set to (0V and 1v) The Output Voltage equation for the circuit as shown Vout = - 12K/20K ( V1 + (V2/2) + (V3/4) + (V4/8)). Where: V1 represents MSB_bit3 and V4 represents LSB_bit0