  We study the physical properties of an $s$-wave -- normal metal -- $d$-wave
junction in terms of the Andreev bound states in the normal metal layer. The
phase dependence of bound states with different orientations leads to
superconducting states with broken time reversal symmetry for generic
orientations of the $d$-wave superconductor crystal. The occurrence of such a
state and the associated spontaneous supercurrent along the junction is
analyzed in the framework of Ginzburg-Landau theory and by the solution of the
Bogolyubov-de Gennes equations.
