NEAR MAGNETIC FIELD PROBE WITH OUTPUT SIGNAL PROCESSING SYSTEM BY INTEGRATION

摘要

PROBLEM TO BE SOLVED: To reduce a signal loss and to simply analyze a high-frequency current wave-form with a simple and small structure on the real-time basis by connecting a connector to a pad section provided on a transmission line, and connecting an integrating circuit to a coaxial cable connected to the connector.;SOLUTION: A loop coil 1 at the tip section of a probe, a transmission line 2 and a pad section 3 are formed with a conductive foil on an insulating board, and a coaxial cable 5 is connected to a connector 4 connected to the pad section 3. An integrating circuit 6 is provided, on the same board, the coaxial cable 5 is connected to its input connector 7, and a coaxial cable 9 is connected to an output connector 8 and connected to a measuring instrument such as an oscilloscope. By this constitution, the differential wave-form signal from the loop coil 1 is signal-processed by the integrating circuit 6 of a chip component, thus the current flowing in the planar wire of a PCB can be detected on the real-time basis without requiring to add excess elements or to provide lead wires.;COPYRIGHT: (C)2000,JPO