On Wed, 15 May 1996, Microsoft Windows wrote: > Would like to ask for some help on getting some definitions. I am looking for a simple definition for inductance and characteristic impedance. I am presenting to a group that is new to CI and would like to keep things simple and easy to understand. > > Thank you in advance > > >From IPC-D-316 (Microwave Design) "Characteristic Impedance (Zo): For a uniform transmission line of any length, the ratio of inductance per unit length to capacitance per unit length. A 50 ohm characteristic impedance is often used because it matches that of most test instrumentation. When a signal propagating along a transmission line encounters a change in Zo, scattering of the signal will occur, that is, some of the signal will be reflected backwards along the line." >From IPC-D-317A (High Speed Design) "Inductance - The property of a conductor that allows it to store energy in a magnetic field induced by a current flowing through it. Units of measure: Henry." Regards __________________________________________________ David W. Bergman, Technical Director IPC 2215 Sanders Road Northbrook, IL 60062-6135 847-509-9700 x340 Phone 847-509-9798 Fax email [log in to unmask] www http://www.ipc.org ---------------------------------------------------