Circuit for high impedance broad band probe

摘要

A zero capacitance measurement probe to be used to make electrical measurements at a broad range of frequencies without having the probe itself affect the measured values. The probe reduces internal capacitances in the solid state active elements or creates a negative impedance to counteract capacitance external capacitance. Elimination of capacitance is accomplished by adjusting gains and current flow within active elements and by insulating the elements from ground by an additional substrate and metalized layer.