Sum of binary weights should be equal to one. (1)
General formula for binary weights associated with LSB:
Time for a question?
Answer: 1/15 , 2/15, 4/15 and 8/15
"The voltage between the ends of the circuit is equal to the total current entering the supernode divided by the total equivalent conductance of the supernode".
Apply the formula for the circuit above.
Any idea why?
Obvious, isn't it!
AND, WE'RE DONE!
But before that,
What's the basic difference between analog and digital signals?
Relax! You don't have to answer this one.