System for measuring response time of a circuit by determining the time difference between the earlier and the later clock pulses applied to the circuit

摘要

A method and device for measuring the response time of a circuit are described in which clocking pulses are applied to the circuit at input pads, the input pads being connected to the circuit by circuitry having substantially the same delays. By adjusting the timing of the later clock pulse relative to the earlier clock pulse until a valid output is just achieved, the response time of the circuit can be measured using a register circuit.