output stage 28 and is configured to instantaneously control the pulsed current output of power supply 27 on a pulse by pulse basis more specifically the current limiting circuit 40 is configured to monitor the pulsed current output of power supply 27 and for each output pulse the current limiting circuit 40 measures the instantaneous current of the pulse and compares the measured instantaneous current to a predetermined threshold current in some embodiments the predetermined threshold current may be the maximum allowable current output of the power supply 27 if the measured instantaneous current exceeds the predetermined threshold current the current limiting circuit 40 controls the pulsed current output of power supply 27 and or terminates the measured pulse as will be discussed in further detail below with reference to fig3 and 4 in one embodiment current limiting circuit 40 includes suitable components preconfigured to measure instantaneous current on a pulse by pulse basis and control e g adjust terminate suspend etc output of generator 20 based on a comparison between the measured current and the predetermined threshold current as will be discussed in detail below for example in some embodiments the predetermined threshold current may be between about 4 5 a and about 6 a in another embodiment the predetermined threshold current may be for example data stored in memory 26 and configured to be compared to each current pulse measured by.