Patent ID: 7116094

Claim:
A system for remotely measuring signals in a circuit under test comprising: means for establishing a first signal in a first selected current path in said circuit; means for establishing a first focused magnetic field at a selected position in said first current path; means for converting said first focused magnetic field into a first Hall voltage; means for transmitting said first Hall voltage to a first frequency gated amplifier; means for gating said amplifier with a first selected signal having a first selected frequency; to modulate, in the amplifier, the converted Hall voltage to provide, at the output of said first amplifier, a second current pulsating at the frequency of said first selected signal; means for transmitting said pulsating flow of current pulses through a second current path to establish in said second current path a second focused magnetic field pulsing at the frequency of said first signal; and, remote magnetic sensing means for detecting said pulsating magnetic field and for providing a electrical output directly proportional to the current in said first path.