Description:A new harmonic oscillator circuit (which is the best in its class) and a new bridge oscillator circuit have been added to this edition; both circuits are of outstanding performance. This practical treatise also places all types of oscillator circuits in a common framework to explain their design and analyze their performance. Actual working circuits are given for all the basic types, and comparisons are made between them. The entire frequency range is covered, from 1 kHz to 100 mHz.