We present a new analysis and numerical study of a DC superconducting
quantum interference device (SQUID) with a damped loop inductance. We
find a previously unreported regime of voltage-flux bistability due to
the damping resistor when the SQUID is biased below the zero-held cri
tical current. We determine the region where this phenomenon can be fo
und in the parameter space defined by the damping resistance and the i
nductance parameter.