ACTIVE PROBE FOR MEASURING VOLTAGE AT HIGH IMPEDANCES

Abstract

The present invention relates to an active probe (1) for measuring a voltage across the terminals of a high-value impedance, said probe comprising: – an impedance-matching circuit (10) configured, on the one hand, to have an input impedance that is at least 100 times higher than the impedance to be measured and, on the other hand, to deliver a low-impedance signal at output; – a probe tip (6) configured to take a measurement and connected to said impedance-matching circuit (10); – a ground reference (G) connected to said impedance-matching circuit (10); said impedance-matching circuit (10) comprising at least one input circuit (14) and a non-inverting amplifier circuit (16) that is suitable for the high impedance values, said input circuit and non-inverting amplifier circuit being connected in a cascading arrangement.

Inventors

Applicants

IPC Classification

G01R 1/ 067 A I G01R 19/ 00 A I G01R 19/ 165 A I