THEORY AND PRACTICE OF LINEARLY TUNABLE LC OSCILLATORS

Abstract

This paper is concerned with the theory and design of linearly tunable Le oscillators using variable transductance elements and linear twoports. The new ideal model introduced in the paper can be considered as a generalization of the well-known and widely used admittance transistor circuits. The new ideal structure uses linearly tunable transductance elements and two linear twoports with Hilbert transform transfer function. The ideal model and its approximate non ideal versions are analyzed and the f- V characteristics is presented in each case. One of the approximate versions of the general ideal structure can easily be implemented by IC technology.