1.

Consider the constant current source shown in the figure below. Let

A. \({{\rm{I}}_0} = \left( {\frac{{{\rm{\beta }} + 1}}{{\rm{\beta }}}} \right)\frac{{{{\rm{V}}_{{\rm{ref}}}}}}{{\rm{R}}}{\rm{\;}}\)
B. \({{\rm{I}}_0} = \left( {\frac{{\rm{\beta }}}{{{\rm{\beta }} + 1}}} \right)\frac{{{{\rm{V}}_{{\rm{ref}}}}}}{{\rm{R}}}{\rm{\;\;}}\)
C. \({{\rm{I}}_0} = \left( {\frac{{{\rm{\beta }} + 1}}{{\rm{\beta }}}} \right)\frac{{{{\rm{V}}_{{\rm{ref}}}}}}{{2{\rm{R}}}}\)
D. \({{\rm{I}}_0} = \left( {\frac{{\rm{\beta }}}{{{\rm{\beta }} + 1}}} \right)\frac{{{{\rm{V}}_{{\rm{ref}}}}}}{{2{\rm{R}}}}\)
Answer» C. \({{\rm{I}}_0} = \left( {\frac{{{\rm{\beta }} + 1}}{{\rm{\beta }}}} \right)\frac{{{{\rm{V}}_{{\rm{ref}}}}}}{{2{\rm{R}}}}\)


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