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## Homework Statement:

- All the BJTs are the same, prove Vref = 2Vbe

## Relevant Equations:

- KVL, ohms law, BJT properties

I am given that all the BJTs are the same.

First of all, when finding node voltages like Vref should I make the node voltage a voltage source first and then do circuit analysis? If so then I would use KVL but that does not give me Vref = 2Vbe.

I do know that Vref = Vb1 = Vb2. What am I doing wrong here? How would you find Vref?

First of all, when finding node voltages like Vref should I make the node voltage a voltage source first and then do circuit analysis? If so then I would use KVL but that does not give me Vref = 2Vbe.

I do know that Vref = Vb1 = Vb2. What am I doing wrong here? How would you find Vref?