Patent ID: 6856126

Claim:
A method for providing signals to a measuring instrument, the method comprising: receiving a first signal and a second signal from a device under test; modifying the first signal using a first circuit located within a probe tip unit, the first circuit; having a frequency response that includes a first transmission zero; transmitting the modified first signal from the probe tip unit along a first flexible transmission line to an amplifier unit located remote from the probe tip unit; further modifying the first signal using a second circuit located within the amplifier unit, the second circuit having a frequency response that includes a first transmission pole; modifying the second signal using a third circuit located within the probe tip unit, the third circuit having a frequency response that includes a second transmission zero; transmitting the modified second signal from the probe tip unit alone a second flexible transmission line to the amplifier unit; further modifying the second signal using a fourth circuit located within the amplifier unit, the fourth circuit having a frequency response that includes a second transmission pole; and providing a third signal to the measuring instrument, the third signal having a voltage value that is responsive to a difference between a value of a current of the further modified first signal and a value of a current of the further modified second signal.