Patent ID: 8823417
Filing Date: 2014-09-02
Classification: G01R,H03K

Abstract:
1. A device for detecting and discriminating a differential current, the device comprising: an input stage configured to receive all of an AC current, a positive DC current and a negative DC current, wherein the differential current actually received over a period of time represents one of the AC current, the positive DC current, or the negative DC current; a positive-side peak detector in communication with the input stage, wherein the positive-side peak detector is configured to receive an output provided by the input stage, and wherein the positive-side peak detector is configured to create a positive-side peak detector output representative of a positive peak of the current input; and a negative-side peak detector in communication with the input stage, wherein the negative-side peak detector is configured to receive the output provided by the input stage, and wherein the negative-side peak detector is configured to create a negative-side peak detector output representative of a negative peak of the current input; wherein the positive-side peak detector output and the negative-side peak detector output cooperate to identify the differential current received at the input stage, the cooperation of the positive-side peak detector output and the negative-side peak detector output discriminating the actually received one from the others of the AC current, positive DC current, and negative DC current.