Patent ID: 8040181
Filing Date: 2011-10-18
Classification: H03K

Abstract:
1. An apparatus, comprising: an operational amplifier having an input and an output, the input coupled to receive an input pulse signal; an output stage having an input coupled to the output of the operational amplifier, a current output configured to couple to a load and a voltage sense output; a comparator having a non-inverting input coupled to the voltage sense output of the output stage, an inverting input configured to couple to an input signal and an output; and a timing circuit having an input coupled to the output of the comparator and an input coupled to the input signal and having an output to supply the input pulse signal, the timing circuit to measure a delay from a change in the input signal to a change in the output of the comparator, the timing circuit to replicate the measured delay as a delay in a change to the input pulse signal.