Unformatted text preview: f ect can be neglected, i.e., V A = ∞ . Making use of the results of Problem 1, label the branch currents and derive the equation for the output current I O . (b) Aside from the di f erence in the equation for I O , what is the major di f erence between the Wilson mirror and the two-BJT current mirror? Make use of the answer for Problem 1 to solve for I C 2 . I REF = I O β + I O /α 1 + 2 /β = ⇒ I O = I REF 1 β + 1 /α 1 + 2 /β The output resistance is much higher than for the two-BJT current mirror. This is caused by a positive feedback e f ect. 1...
View Full Document
- Summer '08
- Integrated Circuit, Professor Leach, two-BJT current mirror