Patent ID: 7545152

Claim:
A pulse measurement circuit for measuring the response of a device under test (DUT) to a pulse generated by a pulse generator wherein said pulse has a predetermined substantially constant voltage and pulse width, comprising: a conductor for coupling said pulse to a selected terminal of said DUT, said conductor having an approximately constant electrical impedance and an approximately constant pulse propagation velocity; a sensing probe connected to said conductor for generating an electrical signal in direct proportion to the current or voltage flowing in said conductor, said sensing probe positioned at an insertion point on said conductor where the propagation time from said insertion point to said DUT terminal is greater than the pulse width of said pulse multiplied by the propagation velocity of said conductor; a signal splitter for dividing the electrical signal from the said sensing probe into two approximately equal sub-signals and for coupling each said sub-signal to a separate output terminal; first and second signal delay paths each having an input end and an output end, each connected at its said input end to a respective one of said signal splitter output terminals, for delaying the propagation time of each said sub-signal a different predetermined amount; a signal combiner coupled to the output end of said first and second signal delay paths for combining said sub-signals into a single output signal; and a recorder for recording said output signal.