  By taking into account the full four band energy spectrum, we calculate the
transmission probability and conductance of electrons across symmetric and
asymmetric double potential barrier with a confined interlayer potential
difference in bilayer graphene. For energies less than the interlayer coupling
\gamma_{1}, E<\gamma_1, we have one channel for transmission which exhibits
resonances, even for incident particles with energies less than the strength of
barriers, E < U_j, depending on the double barrier geometry. In contrast, for
higher energies E > \gamma_{1}, we obtain four possible ways for transmission
resulting from the two propagating modes. We compute the associated
transmission probabilities as well as their contribution to the conductance,
study the effect of the double barrier geometry.
