  Within the RSJ model we performed an analytical and numerical investigation
of SQUID cells consisting of two Josephson junctions shunted by an extremely
small inductance leading to strong coupling of the elements. Contrary to the
well-known behavior of cells shunted by a high inductance voltage phases of the
junctions are locked with very small phase difference for almost all values of
external flux. Only for external flux in the vicinity of half a flux quantum
phase difference rises rapidly to $\pi$.
