Knight expressed many of the concepts very elegantly, with colourful, unambiguous diagrams.
Flipped to a page at random, and scanned it for you. You can download it (but only for the next 2 hours) here:
http://xps2pdf.co.uk/84a99cbf0a35889...ightsample.pdf
EDIT: Also bear in mind that this is more to show you the
style of Knight's presentation. If you're unfamiliar with circuits, note that this is Chapter 32 (And the prior 31 chapters adequately prepare you), which is normally the introductory
second year material (Physics 2B06).