  We have studied the possibility of a single-shot non-demolition measurement
of a superconducting qubit using a microstrip SQUID amplifier (MSA). The
Johnson noise generated by all resistors in the MSA is taken into
consideration. We show that a single-shot non-demolition measurement is
possible with six photons in the measurement resonator. For a phase qubit
inductively coupled to a measurement resonator we have obtained the expression
for the mutual inductance required for measurement of the qubit state.
