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...
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This note was uploaded on 05/26/2011 for the course ECE 3050 taught by Professor Hollis during the Summer '08 term at Georgia Tech.
- Summer '08