  We theoretically investigate the behavior of Andreev interferometers with
three superconducting electrodes in the current-biased regime. Our analysis
allows to predict a number of interesting features of such devices, such as
both hysteretic and non-hysteretic behavior, negative magnetoresistance and two
different sets of singularities of the differential resistance at subgap
voltages. In the non-hysteretic regime we find a pronounced voltage modulation
with the magnetic flux which can be used for improving sensitivity of Andreev
interferometers.
