Method for circuit fault detection in differential signal detect

Details Method for circuit fault detection in differential signal detect Method for circuit fault detection in differential signal detect

1996-07-25

1997-05-27

Mullins, James B.

Surgery

Truss

Pad

324123R, 332 2, 332 69, 332258, 606 35, A61B 504

Patent

active

056322801

ABSTRACT:
The present invention is an apparatus and method for detecting differential mode signals in an environment where differential mode signals co-exist, and might be corrupted by, common mode signals. The most basic apparatus of the present invention essentially comprises first and second input leads through which both differential mode and common mode signals are input; a first amplifier block having a gain that is substantially one; and at least an inverting node and a non-inverting node connected to the first and second input leads. The output of the amplifier block is fed back to the input of the non-inverting node of the amplifier block in a manner to increase differential mode impedance while maintaining a low common mode impedance. Various embodiments of the basic presently claimed circuitry provides for additional methods of monitoring the level of common-mode signal introduced to the apparatus and other fault detection functions.

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