The Cool Oscillator Model with Predicted Performance in Practical Systems with Explanations of Oscillator-Spurs and Injection-Locking Processes

摘要

The Cool-Oscillator with an effective noise temperature much lower than its ambient temperature, is predicted to give phase-noise improvements in excess of 10 to 16dB. It is a Q-multiplier (Q-M) model resulting from applying feedback-control-theory to Leeson's model. It can more easily explain: (a) oscillator-spurs; (b) injection-locking; and (c) spectrum-collapse. Control system analysis predicts system performance in each case and indicates by how much it can be improved. A simple crystal oscillator test circuit is proposed for future experimental investigation of the cool paradigm.