  We perform a self-consistent relativistic RPA calculation for the isobaric
analogue and Gamow-Teller resonances based on relativistic mean field theory
results for the ground states of $^{48}$Ca, $^{90}$Zr and $^{208}$Pb. We use
the parameter set NL1 for the $\sigma$, $\omega$ and $\rho$ mesons, and
experimental values for the pion and nucleon. An extra parameter, related to
the intensity of the contact term in the pion-exchange interaction, is crucial
to reproduce the latter resonances.
