Patent ID: 8456173
Filing Date: 2013-06-04
Classification: G01R

Abstract:
1. A signal acquisition system comprising: a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor coaxial signal cable having a characteristic impedance; and a signal processing instrument having an input node directly coupled to the resistive center conductor coaxial signal cable of the signal acquisition probe and directly coupled to an input amplifier disposed in the signal processing instrument via input circuitry disposed in the signal processing instrument between the input node and the input amplifier; wherein the input circuitry comprises only passive circuit elements or combinations of passive circuit elements in series, with no passive circuit elements or combination of passive circuit elements connecting the input circuitry to ground; wherein the resistive center conductor coaxial signal cable and the input circuitry are directly coupled in series with an input node of the input amplifier and the input circuitry substantially terminating both a resistive part and a capacitive part of the characteristic impedance of the resistive center conductor coaxial signal cable across the input node of the signal processing instrument thereby increasing mid-band and high-band frequency signal current from the output of the resistive center conductor coaxial signal cable into the input node of the input amplifier.