Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> Its a calculus equation: the rate change of voltage divided by the rate change in time. Dr. Resonance Resonance Research Corporation E11870 Shadylane Rd. Baraboo WI 53913 > > May I ask what is meant by dv/dt? > > Luke Galyan > Bluu-at-cox-dot-net > http://members.cox-dot-net/bluu